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Message-ID: <alpine.DEB.2.20.1612251431340.3605@nanos>
Date: Sun, 25 Dec 2016 14:39:31 +0100 (CET)
From: Thomas Gleixner <tglx@...utronix.de>
To: Linus Torvalds <torvalds@...ux-foundation.org>
cc: LKML <linux-kernel@...r.kernel.org>,
Ingo Molnar <mingo@...nel.org>,
"H. Peter Anvin" <hpa@...or.com>
Subject: [GIT pull] smp/hotplug: Removal of notifiers
Linus,
please pull the latest smp-urgent-for-linus git tree from:
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git smp-urgent-for-linus
This is the final cleanup of the hotplug notifier infrastructure. The
series has been reintgrated in the last two days because there came a new
driver using the old infrastructure via the SCSI tree.
- Convert the last leftover drivers utilizing notifiers
- Fixup for a completely broken hotplug user
- Prevent setup of already used states
- Removal of the notifiers
- Treewide cleanup of hotplug state names
- Consolidation of state space
There is a sphinx based documentation pending, but that needs review from
the documentation folks.
Thanks,
tglx
------------------>
Anna-Maria Gleixner (1):
staging/lustre/libcfs: Convert to hotplug state machine
Sebastian Andrzej Siewior (2):
scsi/bnx2fc: Convert to hotplug state machine
scsi/bnx2i: Convert to hotplug state machine
Thomas Gleixner (11):
scsi: qedi: Convert to hotplug state machine
ARM/imx/mmcd: Fix broken cpu hotplug handling
perf/x86/intel/cstate: Prevent hotplug callback leak
bus: arm-ccn: Prevent hotplug callback leak
x86/msr: Remove bogus cleanup from the error path
cpu/hotplug: Prevent overwriting of callbacks
cpu/hotplug: Remove obsolete cpu hotplug register/unregister functions
cpu/hotplug: Cleanup state names
coresight/etm3/4x: Consolidate hotplug state space
irqchip/gic: Consolidate hotplug state space
irqchip/armada-xp: Consolidate hotplug state space
arch/arm/kernel/smp_twd.c | 2 +-
arch/arm/mach-imx/mmdc.c | 34 +--
arch/arm/mach-mvebu/coherency.c | 2 +-
arch/arm/mm/cache-l2x0-pmu.c | 2 +-
arch/arm/mm/cache-l2x0.c | 2 +-
arch/arm/vfp/vfpmodule.c | 2 +-
arch/arm/xen/enlighten.c | 2 +-
arch/arm64/kernel/armv8_deprecated.c | 2 +-
arch/arm64/kernel/debug-monitors.c | 2 +-
arch/arm64/kernel/hw_breakpoint.c | 2 +-
arch/blackfin/kernel/perf_event.c | 2 +-
arch/metag/kernel/perf/perf_event.c | 2 +-
arch/mips/kernel/pm-cps.c | 2 +-
arch/mips/oprofile/op_model_loongson3.c | 2 +-
arch/powerpc/mm/numa.c | 2 +-
arch/powerpc/perf/core-book3s.c | 2 +-
arch/s390/kernel/perf_cpum_cf.c | 2 +-
arch/s390/kernel/perf_cpum_sf.c | 2 +-
arch/x86/entry/vdso/vma.c | 2 +-
arch/x86/events/amd/ibs.c | 2 +-
arch/x86/events/amd/power.c | 2 +-
arch/x86/events/amd/uncore.c | 6 +-
arch/x86/events/core.c | 6 +-
arch/x86/events/intel/cqm.c | 4 +-
arch/x86/events/intel/cstate.c | 14 +-
arch/x86/events/intel/rapl.c | 4 +-
arch/x86/events/intel/uncore.c | 10 +-
arch/x86/kernel/apb_timer.c | 2 +-
arch/x86/kernel/apic/x2apic_cluster.c | 2 +-
arch/x86/kernel/hpet.c | 4 +-
arch/x86/kernel/msr.c | 1 -
arch/x86/kernel/tboot.c | 2 +-
arch/x86/kvm/x86.c | 2 +-
arch/x86/xen/enlighten.c | 4 +-
arch/xtensa/kernel/perf_event.c | 2 +-
drivers/bus/arm-cci.c | 2 +-
drivers/bus/arm-ccn.c | 7 +-
drivers/clocksource/arc_timer.c | 2 +-
drivers/clocksource/arm_arch_timer.c | 2 +-
drivers/clocksource/arm_global_timer.c | 2 +-
drivers/clocksource/dummy_timer.c | 2 +-
drivers/clocksource/exynos_mct.c | 2 +-
drivers/clocksource/jcore-pit.c | 2 +-
drivers/clocksource/metag_generic.c | 2 +-
drivers/clocksource/mips-gic-timer.c | 4 +-
drivers/clocksource/qcom-timer.c | 2 +-
drivers/clocksource/time-armada-370-xp.c | 2 +-
drivers/clocksource/timer-atlas7.c | 2 +-
drivers/hwtracing/coresight/coresight-etm3x.c | 4 +-
drivers/hwtracing/coresight/coresight-etm4x.c | 8 +-
drivers/irqchip/irq-armada-370-xp.c | 6 +-
drivers/irqchip/irq-bcm2836.c | 2 +-
drivers/irqchip/irq-gic-v3.c | 6 +-
drivers/irqchip/irq-gic.c | 2 +-
drivers/irqchip/irq-hip04.c | 2 +-
drivers/leds/trigger/ledtrig-cpu.c | 2 +-
drivers/net/virtio_net.c | 4 +-
drivers/perf/arm_pmu.c | 2 +-
drivers/scsi/bnx2fc/bnx2fc_fcoe.c | 79 +++----
drivers/scsi/bnx2i/bnx2i_init.c | 78 +++----
drivers/scsi/qedi/qedi_main.c | 96 +++------
.../staging/lustre/lnet/libcfs/linux/linux-cpu.c | 85 ++++----
drivers/xen/events/events_fifo.c | 2 +-
include/linux/cpu.h | 90 --------
include/linux/cpuhotplug.h | 9 +-
kernel/cpu.c | 235 +++++----------------
lib/Kconfig.debug | 24 ---
lib/Makefile | 1 -
lib/cpu-notifier-error-inject.c | 84 --------
virt/kvm/arm/arch_timer.c | 2 +-
virt/kvm/arm/vgic/vgic-init.c | 2 +-
virt/kvm/kvm_main.c | 2 +-
72 files changed, 308 insertions(+), 689 deletions(-)
delete mode 100644 lib/cpu-notifier-error-inject.c
diff --git a/arch/arm/kernel/smp_twd.c b/arch/arm/kernel/smp_twd.c
index 02d5e5e8d44c..895ae5197159 100644
--- a/arch/arm/kernel/smp_twd.c
+++ b/arch/arm/kernel/smp_twd.c
@@ -339,7 +339,7 @@ static int __init twd_local_timer_common_register(struct device_node *np)
}
cpuhp_setup_state_nocalls(CPUHP_AP_ARM_TWD_STARTING,
- "AP_ARM_TWD_STARTING",
+ "arm/timer/twd:starting",
twd_timer_starting_cpu, twd_timer_dying_cpu);
twd_get_clock(np);
diff --git a/arch/arm/mach-imx/mmdc.c b/arch/arm/mach-imx/mmdc.c
index ba96bf979625..699157759120 100644
--- a/arch/arm/mach-imx/mmdc.c
+++ b/arch/arm/mach-imx/mmdc.c
@@ -60,6 +60,7 @@
#define to_mmdc_pmu(p) container_of(p, struct mmdc_pmu, pmu)
+static enum cpuhp_state cpuhp_mmdc_state;
static int ddr_type;
struct fsl_mmdc_devtype_data {
@@ -451,8 +452,8 @@ static int imx_mmdc_remove(struct platform_device *pdev)
{
struct mmdc_pmu *pmu_mmdc = platform_get_drvdata(pdev);
+ cpuhp_state_remove_instance_nocalls(cpuhp_mmdc_state, &pmu_mmdc->node);
perf_pmu_unregister(&pmu_mmdc->pmu);
- cpuhp_remove_state_nocalls(CPUHP_ONLINE);
kfree(pmu_mmdc);
return 0;
}
@@ -472,6 +473,18 @@ static int imx_mmdc_perf_init(struct platform_device *pdev, void __iomem *mmdc_b
return -ENOMEM;
}
+ /* The first instance registers the hotplug state */
+ if (!cpuhp_mmdc_state) {
+ ret = cpuhp_setup_state_multi(CPUHP_AP_ONLINE_DYN,
+ "perf/arm/mmdc:online", NULL,
+ mmdc_pmu_offline_cpu);
+ if (ret < 0) {
+ pr_err("cpuhp_setup_state_multi failed\n");
+ goto pmu_free;
+ }
+ cpuhp_mmdc_state = ret;
+ }
+
mmdc_num = mmdc_pmu_init(pmu_mmdc, mmdc_base, &pdev->dev);
if (mmdc_num == 0)
name = "mmdc";
@@ -485,26 +498,23 @@ static int imx_mmdc_perf_init(struct platform_device *pdev, void __iomem *mmdc_b
HRTIMER_MODE_REL);
pmu_mmdc->hrtimer.function = mmdc_pmu_timer_handler;
- cpuhp_state_add_instance_nocalls(CPUHP_ONLINE,
- &pmu_mmdc->node);
- cpumask_set_cpu(smp_processor_id(), &pmu_mmdc->cpu);
- ret = cpuhp_setup_state_multi(CPUHP_AP_NOTIFY_ONLINE,
- "MMDC_ONLINE", NULL,
- mmdc_pmu_offline_cpu);
- if (ret) {
- pr_err("cpuhp_setup_state_multi failure\n");
- goto pmu_register_err;
- }
+ cpumask_set_cpu(raw_smp_processor_id(), &pmu_mmdc->cpu);
+
+ /* Register the pmu instance for cpu hotplug */
+ cpuhp_state_add_instance_nocalls(cpuhp_mmdc_state, &pmu_mmdc->node);
ret = perf_pmu_register(&(pmu_mmdc->pmu), name, -1);
- platform_set_drvdata(pdev, pmu_mmdc);
if (ret)
goto pmu_register_err;
+
+ platform_set_drvdata(pdev, pmu_mmdc);
return 0;
pmu_register_err:
pr_warn("MMDC Perf PMU failed (%d), disabled\n", ret);
+ cpuhp_state_remove_instance_nocalls(cpuhp_mmdc_state, &pmu_mmdc->node);
hrtimer_cancel(&pmu_mmdc->hrtimer);
+pmu_free:
kfree(pmu_mmdc);
return ret;
}
diff --git a/arch/arm/mach-mvebu/coherency.c b/arch/arm/mach-mvebu/coherency.c
index ae2a018b9305..8f8748a0c84f 100644
--- a/arch/arm/mach-mvebu/coherency.c
+++ b/arch/arm/mach-mvebu/coherency.c
@@ -148,7 +148,7 @@ static void __init armada_370_coherency_init(struct device_node *np)
of_node_put(cpu_config_np);
cpuhp_setup_state_nocalls(CPUHP_AP_ARM_MVEBU_COHERENCY,
- "AP_ARM_MVEBU_COHERENCY",
+ "arm/mvebu/coherency:starting",
armada_xp_clear_l2_starting, NULL);
exit:
set_cpu_coherent();
diff --git a/arch/arm/mm/cache-l2x0-pmu.c b/arch/arm/mm/cache-l2x0-pmu.c
index 976d3057272e..0a1e2280141f 100644
--- a/arch/arm/mm/cache-l2x0-pmu.c
+++ b/arch/arm/mm/cache-l2x0-pmu.c
@@ -563,7 +563,7 @@ static __init int l2x0_pmu_init(void)
cpumask_set_cpu(0, &pmu_cpu);
ret = cpuhp_setup_state_nocalls(CPUHP_AP_PERF_ARM_L2X0_ONLINE,
- "AP_PERF_ARM_L2X0_ONLINE", NULL,
+ "perf/arm/l2x0:online", NULL,
l2x0_pmu_offline_cpu);
if (ret)
goto out_pmu;
diff --git a/arch/arm/mm/cache-l2x0.c b/arch/arm/mm/cache-l2x0.c
index d1870c777c6e..2290be390f87 100644
--- a/arch/arm/mm/cache-l2x0.c
+++ b/arch/arm/mm/cache-l2x0.c
@@ -683,7 +683,7 @@ static void __init l2c310_enable(void __iomem *base, unsigned num_lock)
if (aux & L310_AUX_CTRL_FULL_LINE_ZERO)
cpuhp_setup_state(CPUHP_AP_ARM_L2X0_STARTING,
- "AP_ARM_L2X0_STARTING", l2c310_starting_cpu,
+ "arm/l2x0:starting", l2c310_starting_cpu,
l2c310_dying_cpu);
}
diff --git a/arch/arm/vfp/vfpmodule.c b/arch/arm/vfp/vfpmodule.c
index 0351f5645fb1..569d5a650a4a 100644
--- a/arch/arm/vfp/vfpmodule.c
+++ b/arch/arm/vfp/vfpmodule.c
@@ -799,7 +799,7 @@ static int __init vfp_init(void)
}
cpuhp_setup_state_nocalls(CPUHP_AP_ARM_VFP_STARTING,
- "AP_ARM_VFP_STARTING", vfp_starting_cpu,
+ "arm/vfp:starting", vfp_starting_cpu,
vfp_dying_cpu);
vfp_vector = vfp_support_entry;
diff --git a/arch/arm/xen/enlighten.c b/arch/arm/xen/enlighten.c
index 4986dc0c1dff..11d9f2898b16 100644
--- a/arch/arm/xen/enlighten.c
+++ b/arch/arm/xen/enlighten.c
@@ -412,7 +412,7 @@ static int __init xen_guest_init(void)
pvclock_gtod_register_notifier(&xen_pvclock_gtod_notifier);
return cpuhp_setup_state(CPUHP_AP_ARM_XEN_STARTING,
- "AP_ARM_XEN_STARTING", xen_starting_cpu,
+ "arm/xen:starting", xen_starting_cpu,
xen_dying_cpu);
}
early_initcall(xen_guest_init);
diff --git a/arch/arm64/kernel/armv8_deprecated.c b/arch/arm64/kernel/armv8_deprecated.c
index 04de188a36c9..a211addeb6bc 100644
--- a/arch/arm64/kernel/armv8_deprecated.c
+++ b/arch/arm64/kernel/armv8_deprecated.c
@@ -640,7 +640,7 @@ static int __init armv8_deprecated_init(void)
}
cpuhp_setup_state_nocalls(CPUHP_AP_ARM64_ISNDEP_STARTING,
- "AP_ARM64_ISNDEP_STARTING",
+ "arm64/isndep:starting",
run_all_insn_set_hw_mode, NULL);
register_insn_emulation_sysctl(ctl_abi);
diff --git a/arch/arm64/kernel/debug-monitors.c b/arch/arm64/kernel/debug-monitors.c
index 605df76f0a06..2bd426448fc1 100644
--- a/arch/arm64/kernel/debug-monitors.c
+++ b/arch/arm64/kernel/debug-monitors.c
@@ -140,7 +140,7 @@ static int clear_os_lock(unsigned int cpu)
static int debug_monitors_init(void)
{
return cpuhp_setup_state(CPUHP_AP_ARM64_DEBUG_MONITORS_STARTING,
- "CPUHP_AP_ARM64_DEBUG_MONITORS_STARTING",
+ "arm64/debug_monitors:starting",
clear_os_lock, NULL);
}
postcore_initcall(debug_monitors_init);
diff --git a/arch/arm64/kernel/hw_breakpoint.c b/arch/arm64/kernel/hw_breakpoint.c
index 1b3c747fedda..0296e7924240 100644
--- a/arch/arm64/kernel/hw_breakpoint.c
+++ b/arch/arm64/kernel/hw_breakpoint.c
@@ -1001,7 +1001,7 @@ static int __init arch_hw_breakpoint_init(void)
* debugger will leave the world in a nice state for us.
*/
ret = cpuhp_setup_state(CPUHP_AP_PERF_ARM_HW_BREAKPOINT_STARTING,
- "CPUHP_AP_PERF_ARM_HW_BREAKPOINT_STARTING",
+ "perf/arm64/hw_breakpoint:starting",
hw_breakpoint_reset, NULL);
if (ret)
pr_err("failed to register CPU hotplug notifier: %d\n", ret);
diff --git a/arch/blackfin/kernel/perf_event.c b/arch/blackfin/kernel/perf_event.c
index 6355e97d22b9..6a9524ad04a5 100644
--- a/arch/blackfin/kernel/perf_event.c
+++ b/arch/blackfin/kernel/perf_event.c
@@ -475,7 +475,7 @@ static int __init bfin_pmu_init(void)
ret = perf_pmu_register(&pmu, "cpu", PERF_TYPE_RAW);
if (!ret)
- cpuhp_setup_state(CPUHP_PERF_BFIN, "PERF_BFIN",
+ cpuhp_setup_state(CPUHP_PERF_BFIN,"perf/bfin:starting",
bfin_pmu_prepare_cpu, NULL);
return ret;
}
diff --git a/arch/metag/kernel/perf/perf_event.c b/arch/metag/kernel/perf/perf_event.c
index 052cba23708c..7e793eb0c1fe 100644
--- a/arch/metag/kernel/perf/perf_event.c
+++ b/arch/metag/kernel/perf/perf_event.c
@@ -868,7 +868,7 @@ static int __init init_hw_perf_events(void)
metag_out32(0, PERF_COUNT(1));
cpuhp_setup_state(CPUHP_AP_PERF_METAG_STARTING,
- "AP_PERF_METAG_STARTING", metag_pmu_starting_cpu,
+ "perf/metag:starting", metag_pmu_starting_cpu,
NULL);
ret = perf_pmu_register(&pmu, metag_pmu->name, PERF_TYPE_RAW);
diff --git a/arch/mips/kernel/pm-cps.c b/arch/mips/kernel/pm-cps.c
index 7cf653e21423..5f928c34c148 100644
--- a/arch/mips/kernel/pm-cps.c
+++ b/arch/mips/kernel/pm-cps.c
@@ -713,7 +713,7 @@ static int __init cps_pm_init(void)
pr_warn("pm-cps: no CPC, clock & power gating unavailable\n");
}
- return cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "AP_PM_CPS_CPU_ONLINE",
+ return cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "mips/cps_pm:online",
cps_pm_online_cpu, NULL);
}
arch_initcall(cps_pm_init);
diff --git a/arch/mips/oprofile/op_model_loongson3.c b/arch/mips/oprofile/op_model_loongson3.c
index 85f3ee4ab456..d60d97b6113d 100644
--- a/arch/mips/oprofile/op_model_loongson3.c
+++ b/arch/mips/oprofile/op_model_loongson3.c
@@ -186,7 +186,7 @@ static int __init loongson3_init(void)
{
on_each_cpu(reset_counters, NULL, 1);
cpuhp_setup_state_nocalls(CPUHP_AP_MIPS_OP_LOONGSON3_STARTING,
- "AP_MIPS_OP_LOONGSON3_STARTING",
+ "mips/oprofile/loongson3:starting",
loongson3_starting_cpu, loongson3_dying_cpu);
save_perf_irq = perf_irq;
perf_irq = loongson3_perfcount_handler;
diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c
index 0cb6bd8bfccf..b1099cb2f393 100644
--- a/arch/powerpc/mm/numa.c
+++ b/arch/powerpc/mm/numa.c
@@ -944,7 +944,7 @@ void __init initmem_init(void)
* _nocalls() + manual invocation is used because cpuhp is not yet
* initialized for the boot CPU.
*/
- cpuhp_setup_state_nocalls(CPUHP_POWER_NUMA_PREPARE, "POWER_NUMA_PREPARE",
+ cpuhp_setup_state_nocalls(CPUHP_POWER_NUMA_PREPARE, "powerpc/numa:prepare",
ppc_numa_cpu_prepare, ppc_numa_cpu_dead);
for_each_present_cpu(cpu)
numa_setup_cpu(cpu);
diff --git a/arch/powerpc/perf/core-book3s.c b/arch/powerpc/perf/core-book3s.c
index 72c27b8d2cf3..fd3e4034c04d 100644
--- a/arch/powerpc/perf/core-book3s.c
+++ b/arch/powerpc/perf/core-book3s.c
@@ -2189,7 +2189,7 @@ int register_power_pmu(struct power_pmu *pmu)
#endif /* CONFIG_PPC64 */
perf_pmu_register(&power_pmu, "cpu", PERF_TYPE_RAW);
- cpuhp_setup_state(CPUHP_PERF_POWER, "PERF_POWER",
+ cpuhp_setup_state(CPUHP_PERF_POWER, "perf/powerpc:prepare",
power_pmu_prepare_cpu, NULL);
return 0;
}
diff --git a/arch/s390/kernel/perf_cpum_cf.c b/arch/s390/kernel/perf_cpum_cf.c
index 037c2a253ae4..1aba10e90906 100644
--- a/arch/s390/kernel/perf_cpum_cf.c
+++ b/arch/s390/kernel/perf_cpum_cf.c
@@ -711,7 +711,7 @@ static int __init cpumf_pmu_init(void)
return rc;
}
return cpuhp_setup_state(CPUHP_AP_PERF_S390_CF_ONLINE,
- "AP_PERF_S390_CF_ONLINE",
+ "perf/s390/cf:online",
s390_pmu_online_cpu, s390_pmu_offline_cpu);
}
early_initcall(cpumf_pmu_init);
diff --git a/arch/s390/kernel/perf_cpum_sf.c b/arch/s390/kernel/perf_cpum_sf.c
index 763dec18edcd..1c0b58545c04 100644
--- a/arch/s390/kernel/perf_cpum_sf.c
+++ b/arch/s390/kernel/perf_cpum_sf.c
@@ -1623,7 +1623,7 @@ static int __init init_cpum_sampling_pmu(void)
goto out;
}
- cpuhp_setup_state(CPUHP_AP_PERF_S390_SF_ONLINE, "AP_PERF_S390_SF_ONLINE",
+ cpuhp_setup_state(CPUHP_AP_PERF_S390_SF_ONLINE, "perf/s390/sf:online",
s390_pmu_sf_online_cpu, s390_pmu_sf_offline_cpu);
out:
return err;
diff --git a/arch/x86/entry/vdso/vma.c b/arch/x86/entry/vdso/vma.c
index 40121d14d34d..10820f6cefbf 100644
--- a/arch/x86/entry/vdso/vma.c
+++ b/arch/x86/entry/vdso/vma.c
@@ -371,7 +371,7 @@ static int __init init_vdso(void)
/* notifier priority > KVM */
return cpuhp_setup_state(CPUHP_AP_X86_VDSO_VMA_ONLINE,
- "AP_X86_VDSO_VMA_ONLINE", vgetcpu_online, NULL);
+ "x86/vdso/vma:online", vgetcpu_online, NULL);
}
subsys_initcall(init_vdso);
#endif /* CONFIG_X86_64 */
diff --git a/arch/x86/events/amd/ibs.c b/arch/x86/events/amd/ibs.c
index b26ee32f73e8..05612a2529c8 100644
--- a/arch/x86/events/amd/ibs.c
+++ b/arch/x86/events/amd/ibs.c
@@ -1010,7 +1010,7 @@ static __init int amd_ibs_init(void)
* all online cpus.
*/
cpuhp_setup_state(CPUHP_AP_PERF_X86_AMD_IBS_STARTING,
- "AP_PERF_X86_AMD_IBS_STARTING",
+ "perf/x86/amd/ibs:STARTING",
x86_pmu_amd_ibs_starting_cpu,
x86_pmu_amd_ibs_dying_cpu);
diff --git a/arch/x86/events/amd/power.c b/arch/x86/events/amd/power.c
index 9842270ed2f2..a6eee5ac4f58 100644
--- a/arch/x86/events/amd/power.c
+++ b/arch/x86/events/amd/power.c
@@ -291,7 +291,7 @@ static int __init amd_power_pmu_init(void)
cpuhp_setup_state(CPUHP_AP_PERF_X86_AMD_POWER_ONLINE,
- "AP_PERF_X86_AMD_POWER_ONLINE",
+ "perf/x86/amd/power:online",
power_cpu_init, power_cpu_exit);
ret = perf_pmu_register(&pmu_class, "power", -1);
diff --git a/arch/x86/events/amd/uncore.c b/arch/x86/events/amd/uncore.c
index 65577f081d07..a0b1bdb3ad42 100644
--- a/arch/x86/events/amd/uncore.c
+++ b/arch/x86/events/amd/uncore.c
@@ -527,16 +527,16 @@ static int __init amd_uncore_init(void)
* Install callbacks. Core will call them for each online cpu.
*/
if (cpuhp_setup_state(CPUHP_PERF_X86_AMD_UNCORE_PREP,
- "PERF_X86_AMD_UNCORE_PREP",
+ "perf/x86/amd/uncore:prepare",
amd_uncore_cpu_up_prepare, amd_uncore_cpu_dead))
goto fail_l2;
if (cpuhp_setup_state(CPUHP_AP_PERF_X86_AMD_UNCORE_STARTING,
- "AP_PERF_X86_AMD_UNCORE_STARTING",
+ "perf/x86/amd/uncore:starting",
amd_uncore_cpu_starting, NULL))
goto fail_prep;
if (cpuhp_setup_state(CPUHP_AP_PERF_X86_AMD_UNCORE_ONLINE,
- "AP_PERF_X86_AMD_UNCORE_ONLINE",
+ "perf/x86/amd/uncore:online",
amd_uncore_cpu_online,
amd_uncore_cpu_down_prepare))
goto fail_start;
diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c
index f1c22584a46f..019c5887b698 100644
--- a/arch/x86/events/core.c
+++ b/arch/x86/events/core.c
@@ -1820,18 +1820,18 @@ static int __init init_hw_perf_events(void)
* Install callbacks. Core will call them for each online
* cpu.
*/
- err = cpuhp_setup_state(CPUHP_PERF_X86_PREPARE, "PERF_X86_PREPARE",
+ err = cpuhp_setup_state(CPUHP_PERF_X86_PREPARE, "perf/x86:prepare",
x86_pmu_prepare_cpu, x86_pmu_dead_cpu);
if (err)
return err;
err = cpuhp_setup_state(CPUHP_AP_PERF_X86_STARTING,
- "AP_PERF_X86_STARTING", x86_pmu_starting_cpu,
+ "perf/x86:starting", x86_pmu_starting_cpu,
x86_pmu_dying_cpu);
if (err)
goto out;
- err = cpuhp_setup_state(CPUHP_AP_PERF_X86_ONLINE, "AP_PERF_X86_ONLINE",
+ err = cpuhp_setup_state(CPUHP_AP_PERF_X86_ONLINE, "perf/x86:online",
x86_pmu_online_cpu, NULL);
if (err)
goto out1;
diff --git a/arch/x86/events/intel/cqm.c b/arch/x86/events/intel/cqm.c
index 0c45cc8e64ba..8c00dc09a5d2 100644
--- a/arch/x86/events/intel/cqm.c
+++ b/arch/x86/events/intel/cqm.c
@@ -1747,9 +1747,9 @@ static int __init intel_cqm_init(void)
* is enabled to avoid notifier leak.
*/
cpuhp_setup_state(CPUHP_AP_PERF_X86_CQM_STARTING,
- "AP_PERF_X86_CQM_STARTING",
+ "perf/x86/cqm:starting",
intel_cqm_cpu_starting, NULL);
- cpuhp_setup_state(CPUHP_AP_PERF_X86_CQM_ONLINE, "AP_PERF_X86_CQM_ONLINE",
+ cpuhp_setup_state(CPUHP_AP_PERF_X86_CQM_ONLINE, "perf/x86/cqm:online",
NULL, intel_cqm_cpu_exit);
out:
diff --git a/arch/x86/events/intel/cstate.c b/arch/x86/events/intel/cstate.c
index da51e5a3e2ff..fec8a461bdef 100644
--- a/arch/x86/events/intel/cstate.c
+++ b/arch/x86/events/intel/cstate.c
@@ -594,6 +594,9 @@ static int __init cstate_probe(const struct cstate_model *cm)
static inline void cstate_cleanup(void)
{
+ cpuhp_remove_state_nocalls(CPUHP_AP_PERF_X86_CSTATE_ONLINE);
+ cpuhp_remove_state_nocalls(CPUHP_AP_PERF_X86_CSTATE_STARTING);
+
if (has_cstate_core)
perf_pmu_unregister(&cstate_core_pmu);
@@ -606,16 +609,16 @@ static int __init cstate_init(void)
int err;
cpuhp_setup_state(CPUHP_AP_PERF_X86_CSTATE_STARTING,
- "AP_PERF_X86_CSTATE_STARTING", cstate_cpu_init,
- NULL);
+ "perf/x86/cstate:starting", cstate_cpu_init, NULL);
cpuhp_setup_state(CPUHP_AP_PERF_X86_CSTATE_ONLINE,
- "AP_PERF_X86_CSTATE_ONLINE", NULL, cstate_cpu_exit);
+ "perf/x86/cstate:online", NULL, cstate_cpu_exit);
if (has_cstate_core) {
err = perf_pmu_register(&cstate_core_pmu, cstate_core_pmu.name, -1);
if (err) {
has_cstate_core = false;
pr_info("Failed to register cstate core pmu\n");
+ cstate_cleanup();
return err;
}
}
@@ -629,8 +632,7 @@ static int __init cstate_init(void)
return err;
}
}
-
- return err;
+ return 0;
}
static int __init cstate_pmu_init(void)
@@ -655,8 +657,6 @@ module_init(cstate_pmu_init);
static void __exit cstate_pmu_exit(void)
{
- cpuhp_remove_state_nocalls(CPUHP_AP_PERF_X86_CSTATE_ONLINE);
- cpuhp_remove_state_nocalls(CPUHP_AP_PERF_X86_CSTATE_STARTING);
cstate_cleanup();
}
module_exit(cstate_pmu_exit);
diff --git a/arch/x86/events/intel/rapl.c b/arch/x86/events/intel/rapl.c
index 0a535cea8ff3..bd34124449b0 100644
--- a/arch/x86/events/intel/rapl.c
+++ b/arch/x86/events/intel/rapl.c
@@ -803,13 +803,13 @@ static int __init rapl_pmu_init(void)
* Install callbacks. Core will call them for each online cpu.
*/
- ret = cpuhp_setup_state(CPUHP_PERF_X86_RAPL_PREP, "PERF_X86_RAPL_PREP",
+ ret = cpuhp_setup_state(CPUHP_PERF_X86_RAPL_PREP, "perf/x86/rapl:prepare",
rapl_cpu_prepare, NULL);
if (ret)
goto out;
ret = cpuhp_setup_state(CPUHP_AP_PERF_X86_RAPL_ONLINE,
- "AP_PERF_X86_RAPL_ONLINE",
+ "perf/x86/rapl:online",
rapl_cpu_online, rapl_cpu_offline);
if (ret)
goto out1;
diff --git a/arch/x86/events/intel/uncore.c b/arch/x86/events/intel/uncore.c
index dbaaf7dc8373..97c246f84dea 100644
--- a/arch/x86/events/intel/uncore.c
+++ b/arch/x86/events/intel/uncore.c
@@ -1398,22 +1398,22 @@ static int __init intel_uncore_init(void)
*/
if (!cret) {
ret = cpuhp_setup_state(CPUHP_PERF_X86_UNCORE_PREP,
- "PERF_X86_UNCORE_PREP",
- uncore_cpu_prepare, NULL);
+ "perf/x86/intel/uncore:prepare",
+ uncore_cpu_prepare, NULL);
if (ret)
goto err;
} else {
cpuhp_setup_state_nocalls(CPUHP_PERF_X86_UNCORE_PREP,
- "PERF_X86_UNCORE_PREP",
+ "perf/x86/intel/uncore:prepare",
uncore_cpu_prepare, NULL);
}
first_init = 1;
cpuhp_setup_state(CPUHP_AP_PERF_X86_UNCORE_STARTING,
- "AP_PERF_X86_UNCORE_STARTING",
+ "perf/x86/uncore:starting",
uncore_cpu_starting, uncore_cpu_dying);
first_init = 0;
cpuhp_setup_state(CPUHP_AP_PERF_X86_UNCORE_ONLINE,
- "AP_PERF_X86_UNCORE_ONLINE",
+ "perf/x86/uncore:online",
uncore_event_cpu_online, uncore_event_cpu_offline);
return 0;
diff --git a/arch/x86/kernel/apb_timer.c b/arch/x86/kernel/apb_timer.c
index 456316f6c868..202a7817beaf 100644
--- a/arch/x86/kernel/apb_timer.c
+++ b/arch/x86/kernel/apb_timer.c
@@ -234,7 +234,7 @@ static __init int apbt_late_init(void)
if (intel_mid_timer_options == INTEL_MID_TIMER_LAPIC_APBT ||
!apb_timer_block_enabled)
return 0;
- return cpuhp_setup_state(CPUHP_X86_APB_DEAD, "X86_APB_DEAD", NULL,
+ return cpuhp_setup_state(CPUHP_X86_APB_DEAD, "x86/apb:dead", NULL,
apbt_cpu_dead);
}
fs_initcall(apbt_late_init);
diff --git a/arch/x86/kernel/apic/x2apic_cluster.c b/arch/x86/kernel/apic/x2apic_cluster.c
index 200af5ae9662..5a35f208ed95 100644
--- a/arch/x86/kernel/apic/x2apic_cluster.c
+++ b/arch/x86/kernel/apic/x2apic_cluster.c
@@ -191,7 +191,7 @@ static int x2apic_cluster_probe(void)
if (!x2apic_mode)
return 0;
- ret = cpuhp_setup_state(CPUHP_X2APIC_PREPARE, "X2APIC_PREPARE",
+ ret = cpuhp_setup_state(CPUHP_X2APIC_PREPARE, "x86/x2apic:prepare",
x2apic_prepare_cpu, x2apic_dead_cpu);
if (ret < 0) {
pr_err("Failed to register X2APIC_PREPARE\n");
diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c
index 274fab99169d..38c8fd684d38 100644
--- a/arch/x86/kernel/hpet.c
+++ b/arch/x86/kernel/hpet.c
@@ -1051,11 +1051,11 @@ static __init int hpet_late_init(void)
return 0;
/* This notifier should be called after workqueue is ready */
- ret = cpuhp_setup_state(CPUHP_AP_X86_HPET_ONLINE, "AP_X86_HPET_ONLINE",
+ ret = cpuhp_setup_state(CPUHP_AP_X86_HPET_ONLINE, "x86/hpet:online",
hpet_cpuhp_online, NULL);
if (ret)
return ret;
- ret = cpuhp_setup_state(CPUHP_X86_HPET_DEAD, "X86_HPET_DEAD", NULL,
+ ret = cpuhp_setup_state(CPUHP_X86_HPET_DEAD, "x86/hpet:dead", NULL,
hpet_cpuhp_dead);
if (ret)
goto err_cpuhp;
diff --git a/arch/x86/kernel/msr.c b/arch/x86/kernel/msr.c
index f5e3ff835cc8..ef688804f80d 100644
--- a/arch/x86/kernel/msr.c
+++ b/arch/x86/kernel/msr.c
@@ -224,7 +224,6 @@ static int __init msr_init(void)
return 0;
out_class:
- cpuhp_remove_state(cpuhp_msr_state);
class_destroy(msr_class);
out_chrdev:
__unregister_chrdev(MSR_MAJOR, 0, NR_CPUS, "cpu/msr");
diff --git a/arch/x86/kernel/tboot.c b/arch/x86/kernel/tboot.c
index 8402907825b0..b868fa1b812b 100644
--- a/arch/x86/kernel/tboot.c
+++ b/arch/x86/kernel/tboot.c
@@ -408,7 +408,7 @@ static __init int tboot_late_init(void)
tboot_create_trampoline();
atomic_set(&ap_wfs_count, 0);
- cpuhp_setup_state(CPUHP_AP_X86_TBOOT_DYING, "AP_X86_TBOOT_DYING", NULL,
+ cpuhp_setup_state(CPUHP_AP_X86_TBOOT_DYING, "x86/tboot:dying", NULL,
tboot_dying_cpu);
#ifdef CONFIG_DEBUG_FS
debugfs_create_file("tboot_log", S_IRUSR,
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 445c51b6cf6d..6414fa6cb9fd 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -5855,7 +5855,7 @@ static void kvm_timer_init(void)
}
pr_debug("kvm: max_tsc_khz = %ld\n", max_tsc_khz);
- cpuhp_setup_state(CPUHP_AP_X86_KVM_CLK_ONLINE, "AP_X86_KVM_CLK_ONLINE",
+ cpuhp_setup_state(CPUHP_AP_X86_KVM_CLK_ONLINE, "x86/kvm/clk:online",
kvmclock_cpu_online, kvmclock_cpu_down_prep);
}
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index ced7027b3fbc..51ef95232725 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1529,11 +1529,11 @@ static int xen_cpuhp_setup(void)
int rc;
rc = cpuhp_setup_state_nocalls(CPUHP_XEN_PREPARE,
- "XEN_HVM_GUEST_PREPARE",
+ "x86/xen/hvm_guest:prepare",
xen_cpu_up_prepare, xen_cpu_dead);
if (rc >= 0) {
rc = cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN,
- "XEN_HVM_GUEST_ONLINE",
+ "x86/xen/hvm_guest:online",
xen_cpu_up_online, NULL);
if (rc < 0)
cpuhp_remove_state_nocalls(CPUHP_XEN_PREPARE);
diff --git a/arch/xtensa/kernel/perf_event.c b/arch/xtensa/kernel/perf_event.c
index 0fecc8a2c0b5..ff1d81385ed7 100644
--- a/arch/xtensa/kernel/perf_event.c
+++ b/arch/xtensa/kernel/perf_event.c
@@ -422,7 +422,7 @@ static int __init xtensa_pmu_init(void)
int irq = irq_create_mapping(NULL, XCHAL_PROFILING_INTERRUPT);
ret = cpuhp_setup_state(CPUHP_AP_PERF_XTENSA_STARTING,
- "AP_PERF_XTENSA_STARTING", xtensa_pmu_setup,
+ "perf/xtensa:starting", xtensa_pmu_setup,
NULL);
if (ret) {
pr_err("xtensa_pmu: failed to register CPU-hotplug.\n");
diff --git a/drivers/bus/arm-cci.c b/drivers/bus/arm-cci.c
index 231633328dfa..c49da15d9790 100644
--- a/drivers/bus/arm-cci.c
+++ b/drivers/bus/arm-cci.c
@@ -1796,7 +1796,7 @@ static int __init cci_platform_init(void)
int ret;
ret = cpuhp_setup_state_multi(CPUHP_AP_PERF_ARM_CCI_ONLINE,
- "AP_PERF_ARM_CCI_ONLINE", NULL,
+ "perf/arm/cci:online", NULL,
cci_pmu_offline_cpu);
if (ret)
return ret;
diff --git a/drivers/bus/arm-ccn.c b/drivers/bus/arm-ccn.c
index d1074d9b38ba..4d6a2b7e4d3f 100644
--- a/drivers/bus/arm-ccn.c
+++ b/drivers/bus/arm-ccn.c
@@ -1562,7 +1562,7 @@ static int __init arm_ccn_init(void)
int i, ret;
ret = cpuhp_setup_state_multi(CPUHP_AP_PERF_ARM_CCN_ONLINE,
- "AP_PERF_ARM_CCN_ONLINE", NULL,
+ "perf/arm/ccn:online", NULL,
arm_ccn_pmu_offline_cpu);
if (ret)
return ret;
@@ -1570,7 +1570,10 @@ static int __init arm_ccn_init(void)
for (i = 0; i < ARRAY_SIZE(arm_ccn_pmu_events); i++)
arm_ccn_pmu_events_attrs[i] = &arm_ccn_pmu_events[i].attr.attr;
- return platform_driver_register(&arm_ccn_driver);
+ ret = platform_driver_register(&arm_ccn_driver);
+ if (ret)
+ cpuhp_remove_multi_state(CPUHP_AP_PERF_ARM_CCN_ONLINE);
+ return ret;
}
static void __exit arm_ccn_exit(void)
diff --git a/drivers/clocksource/arc_timer.c b/drivers/clocksource/arc_timer.c
index a49748d826c0..2b7e87134d1a 100644
--- a/drivers/clocksource/arc_timer.c
+++ b/drivers/clocksource/arc_timer.c
@@ -309,7 +309,7 @@ static int __init arc_clockevent_setup(struct device_node *node)
}
ret = cpuhp_setup_state(CPUHP_AP_ARC_TIMER_STARTING,
- "AP_ARC_TIMER_STARTING",
+ "clockevents/arc/timer:starting",
arc_timer_starting_cpu,
arc_timer_dying_cpu);
if (ret) {
diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
index 02fef6830e72..cdeca850f29e 100644
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -738,7 +738,7 @@ static int __init arch_timer_register(void)
/* Register and immediately configure the timer on the boot CPU */
err = cpuhp_setup_state(CPUHP_AP_ARM_ARCH_TIMER_STARTING,
- "AP_ARM_ARCH_TIMER_STARTING",
+ "clockevents/arm/arch_timer:starting",
arch_timer_starting_cpu, arch_timer_dying_cpu);
if (err)
goto out_unreg_cpupm;
diff --git a/drivers/clocksource/arm_global_timer.c b/drivers/clocksource/arm_global_timer.c
index 8da03298f844..bbfeb2800a94 100644
--- a/drivers/clocksource/arm_global_timer.c
+++ b/drivers/clocksource/arm_global_timer.c
@@ -316,7 +316,7 @@ static int __init global_timer_of_register(struct device_node *np)
goto out_irq;
err = cpuhp_setup_state(CPUHP_AP_ARM_GLOBAL_TIMER_STARTING,
- "AP_ARM_GLOBAL_TIMER_STARTING",
+ "clockevents/arm/global_timer:starting",
gt_starting_cpu, gt_dying_cpu);
if (err)
goto out_irq;
diff --git a/drivers/clocksource/dummy_timer.c b/drivers/clocksource/dummy_timer.c
index 89f1c2edbe02..01f3f5a59bc6 100644
--- a/drivers/clocksource/dummy_timer.c
+++ b/drivers/clocksource/dummy_timer.c
@@ -34,7 +34,7 @@ static int dummy_timer_starting_cpu(unsigned int cpu)
static int __init dummy_timer_register(void)
{
return cpuhp_setup_state(CPUHP_AP_DUMMY_TIMER_STARTING,
- "AP_DUMMY_TIMER_STARTING",
+ "clockevents/dummy_timer:starting",
dummy_timer_starting_cpu, NULL);
}
early_initcall(dummy_timer_register);
diff --git a/drivers/clocksource/exynos_mct.c b/drivers/clocksource/exynos_mct.c
index 8f3488b80896..b45b72b95861 100644
--- a/drivers/clocksource/exynos_mct.c
+++ b/drivers/clocksource/exynos_mct.c
@@ -552,7 +552,7 @@ static int __init exynos4_timer_resources(struct device_node *np, void __iomem *
/* Install hotplug callbacks which configure the timer on this CPU */
err = cpuhp_setup_state(CPUHP_AP_EXYNOS4_MCT_TIMER_STARTING,
- "AP_EXYNOS4_MCT_TIMER_STARTING",
+ "clockevents/exynos4/mct_timer:starting",
exynos4_mct_starting_cpu,
exynos4_mct_dying_cpu);
if (err)
diff --git a/drivers/clocksource/jcore-pit.c b/drivers/clocksource/jcore-pit.c
index 54e1665aa03c..4e4146f69845 100644
--- a/drivers/clocksource/jcore-pit.c
+++ b/drivers/clocksource/jcore-pit.c
@@ -240,7 +240,7 @@ static int __init jcore_pit_init(struct device_node *node)
}
cpuhp_setup_state(CPUHP_AP_JCORE_TIMER_STARTING,
- "AP_JCORE_TIMER_STARTING",
+ "clockevents/jcore:starting",
jcore_pit_local_init, NULL);
return 0;
diff --git a/drivers/clocksource/metag_generic.c b/drivers/clocksource/metag_generic.c
index a80ab3e446b7..172f43d4bc1a 100644
--- a/drivers/clocksource/metag_generic.c
+++ b/drivers/clocksource/metag_generic.c
@@ -154,6 +154,6 @@ int __init metag_generic_timer_init(void)
/* Hook cpu boot to configure the CPU's timers */
return cpuhp_setup_state(CPUHP_AP_METAG_TIMER_STARTING,
- "AP_METAG_TIMER_STARTING",
+ "clockevents/metag:starting",
arch_timer_starting_cpu, NULL);
}
diff --git a/drivers/clocksource/mips-gic-timer.c b/drivers/clocksource/mips-gic-timer.c
index 7a960cd01104..d9278847ffb2 100644
--- a/drivers/clocksource/mips-gic-timer.c
+++ b/drivers/clocksource/mips-gic-timer.c
@@ -120,8 +120,8 @@ static int gic_clockevent_init(void)
}
cpuhp_setup_state(CPUHP_AP_MIPS_GIC_TIMER_STARTING,
- "AP_MIPS_GIC_TIMER_STARTING", gic_starting_cpu,
- gic_dying_cpu);
+ "clockevents/mips/gic/timer:starting",
+ gic_starting_cpu, gic_dying_cpu);
return 0;
}
diff --git a/drivers/clocksource/qcom-timer.c b/drivers/clocksource/qcom-timer.c
index 3283cfa2aa52..3bf65fff5c08 100644
--- a/drivers/clocksource/qcom-timer.c
+++ b/drivers/clocksource/qcom-timer.c
@@ -182,7 +182,7 @@ static int __init msm_timer_init(u32 dgt_hz, int sched_bits, int irq,
} else {
/* Install and invoke hotplug callbacks */
res = cpuhp_setup_state(CPUHP_AP_QCOM_TIMER_STARTING,
- "AP_QCOM_TIMER_STARTING",
+ "clockevents/qcom/timer:starting",
msm_local_timer_starting_cpu,
msm_local_timer_dying_cpu);
if (res) {
diff --git a/drivers/clocksource/time-armada-370-xp.c b/drivers/clocksource/time-armada-370-xp.c
index 3c39e6f45971..4440aefc59cd 100644
--- a/drivers/clocksource/time-armada-370-xp.c
+++ b/drivers/clocksource/time-armada-370-xp.c
@@ -320,7 +320,7 @@ static int __init armada_370_xp_timer_common_init(struct device_node *np)
}
res = cpuhp_setup_state(CPUHP_AP_ARMADA_TIMER_STARTING,
- "AP_ARMADA_TIMER_STARTING",
+ "clockevents/armada:starting",
armada_370_xp_timer_starting_cpu,
armada_370_xp_timer_dying_cpu);
if (res) {
diff --git a/drivers/clocksource/timer-atlas7.c b/drivers/clocksource/timer-atlas7.c
index 4334e0330ada..3c23e1744f4a 100644
--- a/drivers/clocksource/timer-atlas7.c
+++ b/drivers/clocksource/timer-atlas7.c
@@ -221,7 +221,7 @@ static int __init sirfsoc_clockevent_init(void)
/* Install and invoke hotplug callbacks */
return cpuhp_setup_state(CPUHP_AP_MARCO_TIMER_STARTING,
- "AP_MARCO_TIMER_STARTING",
+ "clockevents/marco:starting",
sirfsoc_local_timer_starting_cpu,
sirfsoc_local_timer_dying_cpu);
}
diff --git a/drivers/hwtracing/coresight/coresight-etm3x.c b/drivers/hwtracing/coresight/coresight-etm3x.c
index 3fe368b23d15..a51b6b64ecdf 100644
--- a/drivers/hwtracing/coresight/coresight-etm3x.c
+++ b/drivers/hwtracing/coresight/coresight-etm3x.c
@@ -804,10 +804,10 @@ static int etm_probe(struct amba_device *adev, const struct amba_id *id)
if (!etm_count++) {
cpuhp_setup_state_nocalls(CPUHP_AP_ARM_CORESIGHT_STARTING,
- "AP_ARM_CORESIGHT_STARTING",
+ "arm/coresight:starting",
etm_starting_cpu, etm_dying_cpu);
ret = cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN,
- "AP_ARM_CORESIGHT_ONLINE",
+ "arm/coresight:online",
etm_online_cpu, NULL);
if (ret < 0)
goto err_arch_supported;
diff --git a/drivers/hwtracing/coresight/coresight-etm4x.c b/drivers/hwtracing/coresight/coresight-etm4x.c
index 4db8d6a4d0cb..031480f2c34d 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x.c
+++ b/drivers/hwtracing/coresight/coresight-etm4x.c
@@ -986,11 +986,11 @@ static int etm4_probe(struct amba_device *adev, const struct amba_id *id)
dev_err(dev, "ETM arch init failed\n");
if (!etm4_count++) {
- cpuhp_setup_state_nocalls(CPUHP_AP_ARM_CORESIGHT4_STARTING,
- "AP_ARM_CORESIGHT4_STARTING",
+ cpuhp_setup_state_nocalls(CPUHP_AP_ARM_CORESIGHT_STARTING,
+ "arm/coresight4:starting",
etm4_starting_cpu, etm4_dying_cpu);
ret = cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN,
- "AP_ARM_CORESIGHT4_ONLINE",
+ "arm/coresight4:online",
etm4_online_cpu, NULL);
if (ret < 0)
goto err_arch_supported;
@@ -1037,7 +1037,7 @@ static int etm4_probe(struct amba_device *adev, const struct amba_id *id)
err_arch_supported:
if (--etm4_count == 0) {
- cpuhp_remove_state_nocalls(CPUHP_AP_ARM_CORESIGHT4_STARTING);
+ cpuhp_remove_state_nocalls(CPUHP_AP_ARM_CORESIGHT_STARTING);
if (hp_online)
cpuhp_remove_state_nocalls(hp_online);
}
diff --git a/drivers/irqchip/irq-armada-370-xp.c b/drivers/irqchip/irq-armada-370-xp.c
index 8bcee65a0b8c..eb0d4d41b156 100644
--- a/drivers/irqchip/irq-armada-370-xp.c
+++ b/drivers/irqchip/irq-armada-370-xp.c
@@ -578,13 +578,13 @@ static int __init armada_370_xp_mpic_of_init(struct device_node *node,
#ifdef CONFIG_SMP
set_smp_cross_call(armada_mpic_send_doorbell);
cpuhp_setup_state_nocalls(CPUHP_AP_IRQ_ARMADA_XP_STARTING,
- "AP_IRQ_ARMADA_XP_STARTING",
+ "irqchip/armada/ipi:starting",
armada_xp_mpic_starting_cpu, NULL);
#endif
} else {
#ifdef CONFIG_SMP
- cpuhp_setup_state_nocalls(CPUHP_AP_IRQ_ARMADA_CASC_STARTING,
- "AP_IRQ_ARMADA_CASC_STARTING",
+ cpuhp_setup_state_nocalls(CPUHP_AP_IRQ_ARMADA_XP_STARTING,
+ "irqchip/armada/cascade:starting",
mpic_cascaded_starting_cpu, NULL);
#endif
irq_set_chained_handler(parent_irq,
diff --git a/drivers/irqchip/irq-bcm2836.c b/drivers/irqchip/irq-bcm2836.c
index d96b2c947e74..e7463e3c0814 100644
--- a/drivers/irqchip/irq-bcm2836.c
+++ b/drivers/irqchip/irq-bcm2836.c
@@ -245,7 +245,7 @@ bcm2836_arm_irqchip_smp_init(void)
#ifdef CONFIG_SMP
/* Unmask IPIs to the boot CPU. */
cpuhp_setup_state(CPUHP_AP_IRQ_BCM2836_STARTING,
- "AP_IRQ_BCM2836_STARTING", bcm2836_cpu_starting,
+ "irqchip/bcm2836:starting", bcm2836_cpu_starting,
bcm2836_cpu_dying);
set_smp_cross_call(bcm2836_arm_irqchip_send_ipi);
diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c
index 26e1d7fafb1e..c132f29322cc 100644
--- a/drivers/irqchip/irq-gic-v3.c
+++ b/drivers/irqchip/irq-gic-v3.c
@@ -632,9 +632,9 @@ static void gic_raise_softirq(const struct cpumask *mask, unsigned int irq)
static void gic_smp_init(void)
{
set_smp_cross_call(gic_raise_softirq);
- cpuhp_setup_state_nocalls(CPUHP_AP_IRQ_GICV3_STARTING,
- "AP_IRQ_GICV3_STARTING", gic_starting_cpu,
- NULL);
+ cpuhp_setup_state_nocalls(CPUHP_AP_IRQ_GIC_STARTING,
+ "irqchip/arm/gicv3:starting",
+ gic_starting_cpu, NULL);
}
static int gic_set_affinity(struct irq_data *d, const struct cpumask *mask_val,
diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c
index d6c404b3584d..1b1df4f770bd 100644
--- a/drivers/irqchip/irq-gic.c
+++ b/drivers/irqchip/irq-gic.c
@@ -1191,7 +1191,7 @@ static int __init __gic_init_bases(struct gic_chip_data *gic,
set_smp_cross_call(gic_raise_softirq);
#endif
cpuhp_setup_state_nocalls(CPUHP_AP_IRQ_GIC_STARTING,
- "AP_IRQ_GIC_STARTING",
+ "irqchip/arm/gic:starting",
gic_starting_cpu, NULL);
set_handle_irq(gic_handle_irq);
if (static_key_true(&supports_deactivate))
diff --git a/drivers/irqchip/irq-hip04.c b/drivers/irqchip/irq-hip04.c
index 021b0e0833c1..c1b4ee955dbe 100644
--- a/drivers/irqchip/irq-hip04.c
+++ b/drivers/irqchip/irq-hip04.c
@@ -407,7 +407,7 @@ hip04_of_init(struct device_node *node, struct device_node *parent)
set_handle_irq(hip04_handle_irq);
hip04_irq_dist_init(&hip04_data);
- cpuhp_setup_state(CPUHP_AP_IRQ_HIP04_STARTING, "AP_IRQ_HIP04_STARTING",
+ cpuhp_setup_state(CPUHP_AP_IRQ_HIP04_STARTING, "irqchip/hip04:starting",
hip04_irq_starting_cpu, NULL);
return 0;
}
diff --git a/drivers/leds/trigger/ledtrig-cpu.c b/drivers/leds/trigger/ledtrig-cpu.c
index 9719caf7437c..a41896468cb3 100644
--- a/drivers/leds/trigger/ledtrig-cpu.c
+++ b/drivers/leds/trigger/ledtrig-cpu.c
@@ -127,7 +127,7 @@ static int __init ledtrig_cpu_init(void)
register_syscore_ops(&ledtrig_cpu_syscore_ops);
- ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "AP_LEDTRIG_STARTING",
+ ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "leds/trigger:starting",
ledtrig_online_cpu, ledtrig_prepare_down_cpu);
if (ret < 0)
pr_err("CPU hotplug notifier for ledtrig-cpu could not be registered: %d\n",
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 5deeda61d6d3..4a105006ca63 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -2484,13 +2484,13 @@ static __init int virtio_net_driver_init(void)
{
int ret;
- ret = cpuhp_setup_state_multi(CPUHP_AP_ONLINE_DYN, "AP_VIRT_NET_ONLINE",
+ ret = cpuhp_setup_state_multi(CPUHP_AP_ONLINE_DYN, "virtio/net:online",
virtnet_cpu_online,
virtnet_cpu_down_prep);
if (ret < 0)
goto out;
virtionet_online = ret;
- ret = cpuhp_setup_state_multi(CPUHP_VIRT_NET_DEAD, "VIRT_NET_DEAD",
+ ret = cpuhp_setup_state_multi(CPUHP_VIRT_NET_DEAD, "virtio/net:dead",
NULL, virtnet_cpu_dead);
if (ret)
goto err_dead;
diff --git a/drivers/perf/arm_pmu.c b/drivers/perf/arm_pmu.c
index b37b57294566..6d9335865880 100644
--- a/drivers/perf/arm_pmu.c
+++ b/drivers/perf/arm_pmu.c
@@ -1084,7 +1084,7 @@ static int arm_pmu_hp_init(void)
int ret;
ret = cpuhp_setup_state_multi(CPUHP_AP_PERF_ARM_STARTING,
- "AP_PERF_ARM_STARTING",
+ "perf/arm/pmu:starting",
arm_perf_starting_cpu, NULL);
if (ret)
pr_err("CPU hotplug notifier for ARM PMU could not be registered: %d\n",
diff --git a/drivers/scsi/bnx2fc/bnx2fc_fcoe.c b/drivers/scsi/bnx2fc/bnx2fc_fcoe.c
index 0990130821fa..c639d5a02656 100644
--- a/drivers/scsi/bnx2fc/bnx2fc_fcoe.c
+++ b/drivers/scsi/bnx2fc/bnx2fc_fcoe.c
@@ -127,13 +127,6 @@ module_param_named(log_fka, bnx2fc_log_fka, uint, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(log_fka, " Print message to kernel log when fcoe is "
"initiating a FIP keep alive when debug logging is enabled.");
-static int bnx2fc_cpu_callback(struct notifier_block *nfb,
- unsigned long action, void *hcpu);
-/* notification function for CPU hotplug events */
-static struct notifier_block bnx2fc_cpu_notifier = {
- .notifier_call = bnx2fc_cpu_callback,
-};
-
static inline struct net_device *bnx2fc_netdev(const struct fc_lport *lport)
{
return ((struct bnx2fc_interface *)
@@ -2622,37 +2615,19 @@ static void bnx2fc_percpu_thread_destroy(unsigned int cpu)
kthread_stop(thread);
}
-/**
- * bnx2fc_cpu_callback - Handler for CPU hotplug events
- *
- * @nfb: The callback data block
- * @action: The event triggering the callback
- * @hcpu: The index of the CPU that the event is for
- *
- * This creates or destroys per-CPU data for fcoe
- *
- * Returns NOTIFY_OK always.
- */
-static int bnx2fc_cpu_callback(struct notifier_block *nfb,
- unsigned long action, void *hcpu)
+
+static int bnx2fc_cpu_online(unsigned int cpu)
{
- unsigned cpu = (unsigned long)hcpu;
+ printk(PFX "CPU %x online: Create Rx thread\n", cpu);
+ bnx2fc_percpu_thread_create(cpu);
+ return 0;
+}
- switch (action) {
- case CPU_ONLINE:
- case CPU_ONLINE_FROZEN:
- printk(PFX "CPU %x online: Create Rx thread\n", cpu);
- bnx2fc_percpu_thread_create(cpu);
- break;
- case CPU_DEAD:
- case CPU_DEAD_FROZEN:
- printk(PFX "CPU %x offline: Remove Rx thread\n", cpu);
- bnx2fc_percpu_thread_destroy(cpu);
- break;
- default:
- break;
- }
- return NOTIFY_OK;
+static int bnx2fc_cpu_dead(unsigned int cpu)
+{
+ printk(PFX "CPU %x offline: Remove Rx thread\n", cpu);
+ bnx2fc_percpu_thread_destroy(cpu);
+ return 0;
}
static int bnx2fc_slave_configure(struct scsi_device *sdev)
@@ -2664,6 +2639,8 @@ static int bnx2fc_slave_configure(struct scsi_device *sdev)
return 0;
}
+static enum cpuhp_state bnx2fc_online_state;
+
/**
* bnx2fc_mod_init - module init entry point
*
@@ -2724,21 +2701,31 @@ static int __init bnx2fc_mod_init(void)
spin_lock_init(&p->fp_work_lock);
}
- cpu_notifier_register_begin();
+ get_online_cpus();
- for_each_online_cpu(cpu) {
+ for_each_online_cpu(cpu)
bnx2fc_percpu_thread_create(cpu);
- }
- /* Initialize per CPU interrupt thread */
- __register_hotcpu_notifier(&bnx2fc_cpu_notifier);
+ rc = cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN,
+ "scsi/bnx2fc:online",
+ bnx2fc_cpu_online, NULL);
+ if (rc < 0)
+ goto stop_threads;
+ bnx2fc_online_state = rc;
- cpu_notifier_register_done();
+ cpuhp_setup_state_nocalls(CPUHP_SCSI_BNX2FC_DEAD, "scsi/bnx2fc:dead",
+ NULL, bnx2fc_cpu_dead);
+ put_online_cpus();
cnic_register_driver(CNIC_ULP_FCOE, &bnx2fc_cnic_cb);
return 0;
+stop_threads:
+ for_each_online_cpu(cpu)
+ bnx2fc_percpu_thread_destroy(cpu);
+ put_online_cpus();
+ kthread_stop(l2_thread);
free_wq:
destroy_workqueue(bnx2fc_wq);
release_bt:
@@ -2797,16 +2784,16 @@ static void __exit bnx2fc_mod_exit(void)
if (l2_thread)
kthread_stop(l2_thread);
- cpu_notifier_register_begin();
-
+ get_online_cpus();
/* Destroy per cpu threads */
for_each_online_cpu(cpu) {
bnx2fc_percpu_thread_destroy(cpu);
}
- __unregister_hotcpu_notifier(&bnx2fc_cpu_notifier);
+ cpuhp_remove_state_nocalls(bnx2fc_online_state);
+ cpuhp_remove_state_nocalls(CPUHP_SCSI_BNX2FC_DEAD);
- cpu_notifier_register_done();
+ put_online_cpus();
destroy_workqueue(bnx2fc_wq);
/*
diff --git a/drivers/scsi/bnx2i/bnx2i_init.c b/drivers/scsi/bnx2i/bnx2i_init.c
index c8b410c24cf0..86afc002814c 100644
--- a/drivers/scsi/bnx2i/bnx2i_init.c
+++ b/drivers/scsi/bnx2i/bnx2i_init.c
@@ -70,14 +70,6 @@ u64 iscsi_error_mask = 0x00;
DEFINE_PER_CPU(struct bnx2i_percpu_s, bnx2i_percpu);
-static int bnx2i_cpu_callback(struct notifier_block *nfb,
- unsigned long action, void *hcpu);
-/* notification function for CPU hotplug events */
-static struct notifier_block bnx2i_cpu_notifier = {
- .notifier_call = bnx2i_cpu_callback,
-};
-
-
/**
* bnx2i_identify_device - identifies NetXtreme II device type
* @hba: Adapter structure pointer
@@ -461,41 +453,21 @@ static void bnx2i_percpu_thread_destroy(unsigned int cpu)
kthread_stop(thread);
}
-
-/**
- * bnx2i_cpu_callback - Handler for CPU hotplug events
- *
- * @nfb: The callback data block
- * @action: The event triggering the callback
- * @hcpu: The index of the CPU that the event is for
- *
- * This creates or destroys per-CPU data for iSCSI
- *
- * Returns NOTIFY_OK always.
- */
-static int bnx2i_cpu_callback(struct notifier_block *nfb,
- unsigned long action, void *hcpu)
+static int bnx2i_cpu_online(unsigned int cpu)
{
- unsigned cpu = (unsigned long)hcpu;
+ pr_info("bnx2i: CPU %x online: Create Rx thread\n", cpu);
+ bnx2i_percpu_thread_create(cpu);
+ return 0;
+}
- switch (action) {
- case CPU_ONLINE:
- case CPU_ONLINE_FROZEN:
- printk(KERN_INFO "bnx2i: CPU %x online: Create Rx thread\n",
- cpu);
- bnx2i_percpu_thread_create(cpu);
- break;
- case CPU_DEAD:
- case CPU_DEAD_FROZEN:
- printk(KERN_INFO "CPU %x offline: Remove Rx thread\n", cpu);
- bnx2i_percpu_thread_destroy(cpu);
- break;
- default:
- break;
- }
- return NOTIFY_OK;
+static int bnx2i_cpu_dead(unsigned int cpu)
+{
+ pr_info("CPU %x offline: Remove Rx thread\n", cpu);
+ bnx2i_percpu_thread_destroy(cpu);
+ return 0;
}
+static enum cpuhp_state bnx2i_online_state;
/**
* bnx2i_mod_init - module init entry point
@@ -539,18 +511,28 @@ static int __init bnx2i_mod_init(void)
p->iothread = NULL;
}
- cpu_notifier_register_begin();
+ get_online_cpus();
for_each_online_cpu(cpu)
bnx2i_percpu_thread_create(cpu);
- /* Initialize per CPU interrupt thread */
- __register_hotcpu_notifier(&bnx2i_cpu_notifier);
-
- cpu_notifier_register_done();
+ err = cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN,
+ "scsi/bnx2i:online",
+ bnx2i_cpu_online, NULL);
+ if (err < 0)
+ goto remove_threads;
+ bnx2i_online_state = err;
+ cpuhp_setup_state_nocalls(CPUHP_SCSI_BNX2I_DEAD, "scsi/bnx2i:dead",
+ NULL, bnx2i_cpu_dead);
+ put_online_cpus();
return 0;
+remove_threads:
+ for_each_online_cpu(cpu)
+ bnx2i_percpu_thread_destroy(cpu);
+ put_online_cpus();
+ cnic_unregister_driver(CNIC_ULP_ISCSI);
unreg_xport:
iscsi_unregister_transport(&bnx2i_iscsi_transport);
out:
@@ -587,14 +569,14 @@ static void __exit bnx2i_mod_exit(void)
}
mutex_unlock(&bnx2i_dev_lock);
- cpu_notifier_register_begin();
+ get_online_cpus();
for_each_online_cpu(cpu)
bnx2i_percpu_thread_destroy(cpu);
- __unregister_hotcpu_notifier(&bnx2i_cpu_notifier);
-
- cpu_notifier_register_done();
+ cpuhp_remove_state_nocalls(bnx2i_online_state);
+ cpuhp_remove_state_nocalls(CPUHP_SCSI_BNX2I_DEAD);
+ put_online_cpus();
iscsi_unregister_transport(&bnx2i_iscsi_transport);
cnic_unregister_driver(CNIC_ULP_ISCSI);
diff --git a/drivers/scsi/qedi/qedi_main.c b/drivers/scsi/qedi/qedi_main.c
index 19ead8d17e55..5eda21d903e9 100644
--- a/drivers/scsi/qedi/qedi_main.c
+++ b/drivers/scsi/qedi/qedi_main.c
@@ -1612,30 +1612,29 @@ static int qedi_percpu_io_thread(void *arg)
return 0;
}
-static void qedi_percpu_thread_create(unsigned int cpu)
+static int qedi_cpu_online(unsigned int cpu)
{
- struct qedi_percpu_s *p;
+ struct qedi_percpu_s *p = this_cpu_ptr(&qedi_percpu);
struct task_struct *thread;
- p = &per_cpu(qedi_percpu, cpu);
-
thread = kthread_create_on_node(qedi_percpu_io_thread, (void *)p,
cpu_to_node(cpu),
"qedi_thread/%d", cpu);
- if (likely(!IS_ERR(thread))) {
- kthread_bind(thread, cpu);
- p->iothread = thread;
- wake_up_process(thread);
- }
+ if (IS_ERR(thread))
+ return PTR_ERR(thread);
+
+ kthread_bind(thread, cpu);
+ p->iothread = thread;
+ wake_up_process(thread);
+ return 0;
}
-static void qedi_percpu_thread_destroy(unsigned int cpu)
+static int qedi_cpu_offline(unsigned int cpu)
{
- struct qedi_percpu_s *p;
- struct task_struct *thread;
+ struct qedi_percpu_s *p = this_cpu_ptr(&qedi_percpu);
struct qedi_work *work, *tmp;
+ struct task_struct *thread;
- p = &per_cpu(qedi_percpu, cpu);
spin_lock_bh(&p->p_work_lock);
thread = p->iothread;
p->iothread = NULL;
@@ -1650,35 +1649,9 @@ static void qedi_percpu_thread_destroy(unsigned int cpu)
spin_unlock_bh(&p->p_work_lock);
if (thread)
kthread_stop(thread);
+ return 0;
}
-static int qedi_cpu_callback(struct notifier_block *nfb,
- unsigned long action, void *hcpu)
-{
- unsigned int cpu = (unsigned long)hcpu;
-
- switch (action) {
- case CPU_ONLINE:
- case CPU_ONLINE_FROZEN:
- QEDI_ERR(NULL, "CPU %d online.\n", cpu);
- qedi_percpu_thread_create(cpu);
- break;
- case CPU_DEAD:
- case CPU_DEAD_FROZEN:
- QEDI_ERR(NULL, "CPU %d offline.\n", cpu);
- qedi_percpu_thread_destroy(cpu);
- break;
- default:
- break;
- }
-
- return NOTIFY_OK;
-}
-
-static struct notifier_block qedi_cpu_notifier = {
- .notifier_call = qedi_cpu_callback,
-};
-
void qedi_reset_host_mtu(struct qedi_ctx *qedi, u16 mtu)
{
struct qed_ll2_params params;
@@ -2038,6 +2011,8 @@ static struct pci_device_id qedi_pci_tbl[] = {
};
MODULE_DEVICE_TABLE(pci, qedi_pci_tbl);
+static enum cpuhp_state qedi_cpuhp_state;
+
static struct pci_driver qedi_pci_driver = {
.name = QEDI_MODULE_NAME,
.id_table = qedi_pci_tbl,
@@ -2047,16 +2022,13 @@ static struct pci_driver qedi_pci_driver = {
static int __init qedi_init(void)
{
- int rc = 0;
- int ret;
struct qedi_percpu_s *p;
- unsigned int cpu = 0;
+ int cpu, rc = 0;
qedi_ops = qed_get_iscsi_ops();
if (!qedi_ops) {
QEDI_ERR(NULL, "Failed to get qed iSCSI operations\n");
- rc = -EINVAL;
- goto exit_qedi_init_0;
+ return -EINVAL;
}
#ifdef CONFIG_DEBUG_FS
@@ -2070,15 +2042,6 @@ static int __init qedi_init(void)
goto exit_qedi_init_1;
}
- register_hotcpu_notifier(&qedi_cpu_notifier);
-
- ret = pci_register_driver(&qedi_pci_driver);
- if (ret) {
- QEDI_ERR(NULL, "Failed to register driver\n");
- rc = -EINVAL;
- goto exit_qedi_init_2;
- }
-
for_each_possible_cpu(cpu) {
p = &per_cpu(qedi_percpu, cpu);
INIT_LIST_HEAD(&p->work_list);
@@ -2086,11 +2049,22 @@ static int __init qedi_init(void)
p->iothread = NULL;
}
- for_each_online_cpu(cpu)
- qedi_percpu_thread_create(cpu);
+ rc = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "scsi/qedi:online",
+ qedi_cpu_online, qedi_cpu_offline);
+ if (rc < 0)
+ goto exit_qedi_init_2;
+ qedi_cpuhp_state = rc;
- return rc;
+ rc = pci_register_driver(&qedi_pci_driver);
+ if (rc) {
+ QEDI_ERR(NULL, "Failed to register driver\n");
+ goto exit_qedi_hp;
+ }
+
+ return 0;
+exit_qedi_hp:
+ cpuhp_remove_state(qedi_cpuhp_state);
exit_qedi_init_2:
iscsi_unregister_transport(&qedi_iscsi_transport);
exit_qedi_init_1:
@@ -2098,19 +2072,13 @@ static int __init qedi_init(void)
qedi_dbg_exit();
#endif
qed_put_iscsi_ops();
-exit_qedi_init_0:
return rc;
}
static void __exit qedi_cleanup(void)
{
- unsigned int cpu = 0;
-
- for_each_online_cpu(cpu)
- qedi_percpu_thread_destroy(cpu);
-
pci_unregister_driver(&qedi_pci_driver);
- unregister_hotcpu_notifier(&qedi_cpu_notifier);
+ cpuhp_remove_state(qedi_cpuhp_state);
iscsi_unregister_transport(&qedi_iscsi_transport);
#ifdef CONFIG_DEBUG_FS
diff --git a/drivers/staging/lustre/lnet/libcfs/linux/linux-cpu.c b/drivers/staging/lustre/lnet/libcfs/linux/linux-cpu.c
index 6b9cf06e8df2..427e2198bb9e 100644
--- a/drivers/staging/lustre/lnet/libcfs/linux/linux-cpu.c
+++ b/drivers/staging/lustre/lnet/libcfs/linux/linux-cpu.c
@@ -967,48 +967,38 @@ cfs_cpt_table_create_pattern(char *pattern)
}
#ifdef CONFIG_HOTPLUG_CPU
-static int
-cfs_cpu_notify(struct notifier_block *self, unsigned long action, void *hcpu)
-{
- unsigned int cpu = (unsigned long)hcpu;
- bool warn;
-
- switch (action) {
- case CPU_DEAD:
- case CPU_DEAD_FROZEN:
- case CPU_ONLINE:
- case CPU_ONLINE_FROZEN:
- spin_lock(&cpt_data.cpt_lock);
- cpt_data.cpt_version++;
- spin_unlock(&cpt_data.cpt_lock);
- /* Fall through */
- default:
- if (action != CPU_DEAD && action != CPU_DEAD_FROZEN) {
- CDEBUG(D_INFO, "CPU changed [cpu %u action %lx]\n",
- cpu, action);
- break;
- }
+static enum cpuhp_state lustre_cpu_online;
- mutex_lock(&cpt_data.cpt_mutex);
- /* if all HTs in a core are offline, it may break affinity */
- cpumask_copy(cpt_data.cpt_cpumask,
- topology_sibling_cpumask(cpu));
- warn = cpumask_any_and(cpt_data.cpt_cpumask,
- cpu_online_mask) >= nr_cpu_ids;
- mutex_unlock(&cpt_data.cpt_mutex);
- CDEBUG(warn ? D_WARNING : D_INFO,
- "Lustre: can't support CPU plug-out well now, performance and stability could be impacted [CPU %u action: %lx]\n",
- cpu, action);
- }
+static void cfs_cpu_incr_cpt_version(void)
+{
+ spin_lock(&cpt_data.cpt_lock);
+ cpt_data.cpt_version++;
+ spin_unlock(&cpt_data.cpt_lock);
+}
- return NOTIFY_OK;
+static int cfs_cpu_online(unsigned int cpu)
+{
+ cfs_cpu_incr_cpt_version();
+ return 0;
}
-static struct notifier_block cfs_cpu_notifier = {
- .notifier_call = cfs_cpu_notify,
- .priority = 0
-};
+static int cfs_cpu_dead(unsigned int cpu)
+{
+ bool warn;
+
+ cfs_cpu_incr_cpt_version();
+ mutex_lock(&cpt_data.cpt_mutex);
+ /* if all HTs in a core are offline, it may break affinity */
+ cpumask_copy(cpt_data.cpt_cpumask, topology_sibling_cpumask(cpu));
+ warn = cpumask_any_and(cpt_data.cpt_cpumask,
+ cpu_online_mask) >= nr_cpu_ids;
+ mutex_unlock(&cpt_data.cpt_mutex);
+ CDEBUG(warn ? D_WARNING : D_INFO,
+ "Lustre: can't support CPU plug-out well now, performance and stability could be impacted [CPU %u]\n",
+ cpu);
+ return 0;
+}
#endif
void
@@ -1018,7 +1008,9 @@ cfs_cpu_fini(void)
cfs_cpt_table_free(cfs_cpt_table);
#ifdef CONFIG_HOTPLUG_CPU
- unregister_hotcpu_notifier(&cfs_cpu_notifier);
+ if (lustre_cpu_online > 0)
+ cpuhp_remove_state_nocalls(lustre_cpu_online);
+ cpuhp_remove_state_nocalls(CPUHP_LUSTRE_CFS_DEAD);
#endif
if (cpt_data.cpt_cpumask)
LIBCFS_FREE(cpt_data.cpt_cpumask, cpumask_size());
@@ -1027,6 +1019,8 @@ cfs_cpu_fini(void)
int
cfs_cpu_init(void)
{
+ int ret = 0;
+
LASSERT(!cfs_cpt_table);
memset(&cpt_data, 0, sizeof(cpt_data));
@@ -1041,8 +1035,19 @@ cfs_cpu_init(void)
mutex_init(&cpt_data.cpt_mutex);
#ifdef CONFIG_HOTPLUG_CPU
- register_hotcpu_notifier(&cfs_cpu_notifier);
+ ret = cpuhp_setup_state_nocalls(CPUHP_LUSTRE_CFS_DEAD,
+ "staging/lustre/cfe:dead", NULL,
+ cfs_cpu_dead);
+ if (ret < 0)
+ goto failed;
+ ret = cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN,
+ "staging/lustre/cfe:online",
+ cfs_cpu_online, NULL);
+ if (ret < 0)
+ goto failed;
+ lustre_cpu_online = ret;
#endif
+ ret = -EINVAL;
if (*cpu_pattern) {
cfs_cpt_table = cfs_cpt_table_create_pattern(cpu_pattern);
@@ -1075,7 +1080,7 @@ cfs_cpu_init(void)
failed:
cfs_cpu_fini();
- return -1;
+ return ret;
}
#endif
diff --git a/drivers/xen/events/events_fifo.c b/drivers/xen/events/events_fifo.c
index 7ef27c6ed72f..c03f9c86c7e3 100644
--- a/drivers/xen/events/events_fifo.c
+++ b/drivers/xen/events/events_fifo.c
@@ -445,7 +445,7 @@ int __init xen_evtchn_fifo_init(void)
evtchn_ops = &evtchn_ops_fifo;
cpuhp_setup_state_nocalls(CPUHP_XEN_EVTCHN_PREPARE,
- "CPUHP_XEN_EVTCHN_PREPARE",
+ "xen/evtchn:prepare",
xen_evtchn_cpu_prepare, xen_evtchn_cpu_dead);
out:
put_cpu();
diff --git a/include/linux/cpu.h b/include/linux/cpu.h
index 09807c2ce328..21f9c74496e7 100644
--- a/include/linux/cpu.h
+++ b/include/linux/cpu.h
@@ -57,9 +57,6 @@ struct notifier_block;
#define CPU_ONLINE 0x0002 /* CPU (unsigned)v is up */
#define CPU_UP_PREPARE 0x0003 /* CPU (unsigned)v coming up */
-#define CPU_UP_CANCELED 0x0004 /* CPU (unsigned)v NOT coming up */
-#define CPU_DOWN_PREPARE 0x0005 /* CPU (unsigned)v going down */
-#define CPU_DOWN_FAILED 0x0006 /* CPU (unsigned)v NOT going down */
#define CPU_DEAD 0x0007 /* CPU (unsigned)v dead */
#define CPU_POST_DEAD 0x0009 /* CPU (unsigned)v dead, cpu_hotplug
* lock is dropped */
@@ -80,80 +77,14 @@ struct notifier_block;
#ifdef CONFIG_SMP
extern bool cpuhp_tasks_frozen;
-/* Need to know about CPUs going up/down? */
-#if defined(CONFIG_HOTPLUG_CPU) || !defined(MODULE)
-#define cpu_notifier(fn, pri) { \
- static struct notifier_block fn##_nb = \
- { .notifier_call = fn, .priority = pri }; \
- register_cpu_notifier(&fn##_nb); \
-}
-
-#define __cpu_notifier(fn, pri) { \
- static struct notifier_block fn##_nb = \
- { .notifier_call = fn, .priority = pri }; \
- __register_cpu_notifier(&fn##_nb); \
-}
-
-extern int register_cpu_notifier(struct notifier_block *nb);
-extern int __register_cpu_notifier(struct notifier_block *nb);
-extern void unregister_cpu_notifier(struct notifier_block *nb);
-extern void __unregister_cpu_notifier(struct notifier_block *nb);
-
-#else /* #if defined(CONFIG_HOTPLUG_CPU) || !defined(MODULE) */
-#define cpu_notifier(fn, pri) do { (void)(fn); } while (0)
-#define __cpu_notifier(fn, pri) do { (void)(fn); } while (0)
-
-static inline int register_cpu_notifier(struct notifier_block *nb)
-{
- return 0;
-}
-
-static inline int __register_cpu_notifier(struct notifier_block *nb)
-{
- return 0;
-}
-
-static inline void unregister_cpu_notifier(struct notifier_block *nb)
-{
-}
-
-static inline void __unregister_cpu_notifier(struct notifier_block *nb)
-{
-}
-#endif
-
int cpu_up(unsigned int cpu);
void notify_cpu_starting(unsigned int cpu);
extern void cpu_maps_update_begin(void);
extern void cpu_maps_update_done(void);
-#define cpu_notifier_register_begin cpu_maps_update_begin
-#define cpu_notifier_register_done cpu_maps_update_done
-
#else /* CONFIG_SMP */
#define cpuhp_tasks_frozen 0
-#define cpu_notifier(fn, pri) do { (void)(fn); } while (0)
-#define __cpu_notifier(fn, pri) do { (void)(fn); } while (0)
-
-static inline int register_cpu_notifier(struct notifier_block *nb)
-{
- return 0;
-}
-
-static inline int __register_cpu_notifier(struct notifier_block *nb)
-{
- return 0;
-}
-
-static inline void unregister_cpu_notifier(struct notifier_block *nb)
-{
-}
-
-static inline void __unregister_cpu_notifier(struct notifier_block *nb)
-{
-}
-
static inline void cpu_maps_update_begin(void)
{
}
@@ -162,14 +93,6 @@ static inline void cpu_maps_update_done(void)
{
}
-static inline void cpu_notifier_register_begin(void)
-{
-}
-
-static inline void cpu_notifier_register_done(void)
-{
-}
-
#endif /* CONFIG_SMP */
extern struct bus_type cpu_subsys;
@@ -182,12 +105,6 @@ extern void get_online_cpus(void);
extern void put_online_cpus(void);
extern void cpu_hotplug_disable(void);
extern void cpu_hotplug_enable(void);
-#define hotcpu_notifier(fn, pri) cpu_notifier(fn, pri)
-#define __hotcpu_notifier(fn, pri) __cpu_notifier(fn, pri)
-#define register_hotcpu_notifier(nb) register_cpu_notifier(nb)
-#define __register_hotcpu_notifier(nb) __register_cpu_notifier(nb)
-#define unregister_hotcpu_notifier(nb) unregister_cpu_notifier(nb)
-#define __unregister_hotcpu_notifier(nb) __unregister_cpu_notifier(nb)
void clear_tasks_mm_cpumask(int cpu);
int cpu_down(unsigned int cpu);
@@ -199,13 +116,6 @@ static inline void cpu_hotplug_done(void) {}
#define put_online_cpus() do { } while (0)
#define cpu_hotplug_disable() do { } while (0)
#define cpu_hotplug_enable() do { } while (0)
-#define hotcpu_notifier(fn, pri) do { (void)(fn); } while (0)
-#define __hotcpu_notifier(fn, pri) do { (void)(fn); } while (0)
-/* These aren't inline functions due to a GCC bug. */
-#define register_hotcpu_notifier(nb) ({ (void)(nb); 0; })
-#define __register_hotcpu_notifier(nb) ({ (void)(nb); 0; })
-#define unregister_hotcpu_notifier(nb) ({ (void)(nb); })
-#define __unregister_hotcpu_notifier(nb) ({ (void)(nb); })
#endif /* CONFIG_HOTPLUG_CPU */
#ifdef CONFIG_PM_SLEEP_SMP
diff --git a/include/linux/cpuhotplug.h b/include/linux/cpuhotplug.h
index 2ab7bf53d529..20bfefbe7594 100644
--- a/include/linux/cpuhotplug.h
+++ b/include/linux/cpuhotplug.h
@@ -41,6 +41,9 @@ enum cpuhp_state {
CPUHP_NET_DEV_DEAD,
CPUHP_PCI_XGENE_DEAD,
CPUHP_IOMMU_INTEL_DEAD,
+ CPUHP_LUSTRE_CFS_DEAD,
+ CPUHP_SCSI_BNX2FC_DEAD,
+ CPUHP_SCSI_BNX2I_DEAD,
CPUHP_WORKQUEUE_PREP,
CPUHP_POWER_NUMA_PREPARE,
CPUHP_HRTIMERS_PREPARE,
@@ -56,7 +59,6 @@ enum cpuhp_state {
CPUHP_POWERPC_MMU_CTX_PREPARE,
CPUHP_XEN_PREPARE,
CPUHP_XEN_EVTCHN_PREPARE,
- CPUHP_NOTIFY_PREPARE,
CPUHP_ARM_SHMOBILE_SCU_PREPARE,
CPUHP_SH_SH3X_PREPARE,
CPUHP_BLK_MQ_PREPARE,
@@ -71,7 +73,6 @@ enum cpuhp_state {
CPUHP_KVM_PPC_BOOK3S_PREPARE,
CPUHP_ZCOMP_PREPARE,
CPUHP_TIMERS_DEAD,
- CPUHP_NOTF_ERR_INJ_PREPARE,
CPUHP_MIPS_SOC_PREPARE,
CPUHP_BRINGUP_CPU,
CPUHP_AP_IDLE_DEAD,
@@ -79,10 +80,8 @@ enum cpuhp_state {
CPUHP_AP_SCHED_STARTING,
CPUHP_AP_RCUTREE_DYING,
CPUHP_AP_IRQ_GIC_STARTING,
- CPUHP_AP_IRQ_GICV3_STARTING,
CPUHP_AP_IRQ_HIP04_STARTING,
CPUHP_AP_IRQ_ARMADA_XP_STARTING,
- CPUHP_AP_IRQ_ARMADA_CASC_STARTING,
CPUHP_AP_IRQ_BCM2836_STARTING,
CPUHP_AP_ARM_MVEBU_COHERENCY,
CPUHP_AP_PERF_X86_UNCORE_STARTING,
@@ -118,7 +117,6 @@ enum cpuhp_state {
CPUHP_AP_DUMMY_TIMER_STARTING,
CPUHP_AP_ARM_XEN_STARTING,
CPUHP_AP_ARM_CORESIGHT_STARTING,
- CPUHP_AP_ARM_CORESIGHT4_STARTING,
CPUHP_AP_ARM64_ISNDEP_STARTING,
CPUHP_AP_SMPCFD_DYING,
CPUHP_AP_X86_TBOOT_DYING,
@@ -142,7 +140,6 @@ enum cpuhp_state {
CPUHP_AP_PERF_ARM_L2X0_ONLINE,
CPUHP_AP_WORKQUEUE_ONLINE,
CPUHP_AP_RCUTREE_ONLINE,
- CPUHP_AP_NOTIFY_ONLINE,
CPUHP_AP_ONLINE_DYN,
CPUHP_AP_ONLINE_DYN_END = CPUHP_AP_ONLINE_DYN + 30,
CPUHP_AP_X86_HPET_ONLINE,
diff --git a/kernel/cpu.c b/kernel/cpu.c
index 5339aca811d2..042fd7e8e030 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -183,23 +183,16 @@ EXPORT_SYMBOL_GPL(cpuhp_tasks_frozen);
/*
* The following two APIs (cpu_maps_update_begin/done) must be used when
* attempting to serialize the updates to cpu_online_mask & cpu_present_mask.
- * The APIs cpu_notifier_register_begin/done() must be used to protect CPU
- * hotplug callback (un)registration performed using __register_cpu_notifier()
- * or __unregister_cpu_notifier().
*/
void cpu_maps_update_begin(void)
{
mutex_lock(&cpu_add_remove_lock);
}
-EXPORT_SYMBOL(cpu_notifier_register_begin);
void cpu_maps_update_done(void)
{
mutex_unlock(&cpu_add_remove_lock);
}
-EXPORT_SYMBOL(cpu_notifier_register_done);
-
-static RAW_NOTIFIER_HEAD(cpu_chain);
/* If set, cpu_up and cpu_down will return -EBUSY and do nothing.
* Should always be manipulated under cpu_add_remove_lock
@@ -349,66 +342,7 @@ void cpu_hotplug_enable(void)
EXPORT_SYMBOL_GPL(cpu_hotplug_enable);
#endif /* CONFIG_HOTPLUG_CPU */
-/* Need to know about CPUs going up/down? */
-int register_cpu_notifier(struct notifier_block *nb)
-{
- int ret;
- cpu_maps_update_begin();
- ret = raw_notifier_chain_register(&cpu_chain, nb);
- cpu_maps_update_done();
- return ret;
-}
-
-int __register_cpu_notifier(struct notifier_block *nb)
-{
- return raw_notifier_chain_register(&cpu_chain, nb);
-}
-
-static int __cpu_notify(unsigned long val, unsigned int cpu, int nr_to_call,
- int *nr_calls)
-{
- unsigned long mod = cpuhp_tasks_frozen ? CPU_TASKS_FROZEN : 0;
- void *hcpu = (void *)(long)cpu;
-
- int ret;
-
- ret = __raw_notifier_call_chain(&cpu_chain, val | mod, hcpu, nr_to_call,
- nr_calls);
-
- return notifier_to_errno(ret);
-}
-
-static int cpu_notify(unsigned long val, unsigned int cpu)
-{
- return __cpu_notify(val, cpu, -1, NULL);
-}
-
-static void cpu_notify_nofail(unsigned long val, unsigned int cpu)
-{
- BUG_ON(cpu_notify(val, cpu));
-}
-
/* Notifier wrappers for transitioning to state machine */
-static int notify_prepare(unsigned int cpu)
-{
- int nr_calls = 0;
- int ret;
-
- ret = __cpu_notify(CPU_UP_PREPARE, cpu, -1, &nr_calls);
- if (ret) {
- nr_calls--;
- printk(KERN_WARNING "%s: attempt to bring up CPU %u failed\n",
- __func__, cpu);
- __cpu_notify(CPU_UP_CANCELED, cpu, nr_calls, NULL);
- }
- return ret;
-}
-
-static int notify_online(unsigned int cpu)
-{
- cpu_notify(CPU_ONLINE, cpu);
- return 0;
-}
static int bringup_wait_for_ap(unsigned int cpu)
{
@@ -433,10 +367,8 @@ static int bringup_cpu(unsigned int cpu)
/* Arch-specific enabling code. */
ret = __cpu_up(cpu, idle);
irq_unlock_sparse();
- if (ret) {
- cpu_notify(CPU_UP_CANCELED, cpu);
+ if (ret)
return ret;
- }
ret = bringup_wait_for_ap(cpu);
BUG_ON(!cpu_online(cpu));
return ret;
@@ -565,11 +497,6 @@ static void cpuhp_thread_fun(unsigned int cpu)
BUG_ON(st->state < CPUHP_AP_ONLINE_IDLE);
undo_cpu_down(cpu, st);
- /*
- * This is a momentary workaround to keep the notifier users
- * happy. Will go away once we got rid of the notifiers.
- */
- cpu_notify_nofail(CPU_DOWN_FAILED, cpu);
st->rollback = false;
} else {
/* Cannot happen .... */
@@ -659,22 +586,6 @@ void __init cpuhp_threads_init(void)
kthread_unpark(this_cpu_read(cpuhp_state.thread));
}
-EXPORT_SYMBOL(register_cpu_notifier);
-EXPORT_SYMBOL(__register_cpu_notifier);
-void unregister_cpu_notifier(struct notifier_block *nb)
-{
- cpu_maps_update_begin();
- raw_notifier_chain_unregister(&cpu_chain, nb);
- cpu_maps_update_done();
-}
-EXPORT_SYMBOL(unregister_cpu_notifier);
-
-void __unregister_cpu_notifier(struct notifier_block *nb)
-{
- raw_notifier_chain_unregister(&cpu_chain, nb);
-}
-EXPORT_SYMBOL(__unregister_cpu_notifier);
-
#ifdef CONFIG_HOTPLUG_CPU
/**
* clear_tasks_mm_cpumask - Safely clear tasks' mm_cpumask for a CPU
@@ -741,20 +652,6 @@ static inline void check_for_tasks(int dead_cpu)
read_unlock(&tasklist_lock);
}
-static int notify_down_prepare(unsigned int cpu)
-{
- int err, nr_calls = 0;
-
- err = __cpu_notify(CPU_DOWN_PREPARE, cpu, -1, &nr_calls);
- if (err) {
- nr_calls--;
- __cpu_notify(CPU_DOWN_FAILED, cpu, nr_calls, NULL);
- pr_warn("%s: attempt to take down CPU %u failed\n",
- __func__, cpu);
- }
- return err;
-}
-
/* Take this CPU down. */
static int take_cpu_down(void *_param)
{
@@ -833,13 +730,6 @@ static int takedown_cpu(unsigned int cpu)
return 0;
}
-static int notify_dead(unsigned int cpu)
-{
- cpu_notify_nofail(CPU_DEAD, cpu);
- check_for_tasks(cpu);
- return 0;
-}
-
static void cpuhp_complete_idle_dead(void *arg)
{
struct cpuhp_cpu_state *st = arg;
@@ -863,9 +753,7 @@ void cpuhp_report_idle_dead(void)
}
#else
-#define notify_down_prepare NULL
#define takedown_cpu NULL
-#define notify_dead NULL
#endif
#ifdef CONFIG_HOTPLUG_CPU
@@ -924,9 +812,6 @@ static int __ref _cpu_down(unsigned int cpu, int tasks_frozen,
hasdied = prev_state != st->state && st->state == CPUHP_OFFLINE;
out:
cpu_hotplug_done();
- /* This post dead nonsense must die */
- if (!ret && hasdied)
- cpu_notify_nofail(CPU_POST_DEAD, cpu);
return ret;
}
@@ -1292,17 +1177,6 @@ static struct cpuhp_step cpuhp_bp_states[] = {
.teardown.single = rcutree_dead_cpu,
},
/*
- * Preparatory and dead notifiers. Will be replaced once the notifiers
- * are converted to states.
- */
- [CPUHP_NOTIFY_PREPARE] = {
- .name = "notify:prepare",
- .startup.single = notify_prepare,
- .teardown.single = notify_dead,
- .skip_onerr = true,
- .cant_stop = true,
- },
- /*
* On the tear-down path, timers_dead_cpu() must be invoked
* before blk_mq_queue_reinit_notify() from notify_dead(),
* otherwise a RCU stall occurs.
@@ -1391,17 +1265,6 @@ static struct cpuhp_step cpuhp_ap_states[] = {
.startup.single = rcutree_online_cpu,
.teardown.single = rcutree_offline_cpu,
},
-
- /*
- * Online/down_prepare notifiers. Will be removed once the notifiers
- * are converted to states.
- */
- [CPUHP_AP_NOTIFY_ONLINE] = {
- .name = "notify:online",
- .startup.single = notify_online,
- .teardown.single = notify_down_prepare,
- .skip_onerr = true,
- },
#endif
/*
* The dynamically registered state space is here
@@ -1432,23 +1295,53 @@ static int cpuhp_cb_check(enum cpuhp_state state)
return 0;
}
-static void cpuhp_store_callbacks(enum cpuhp_state state,
- const char *name,
- int (*startup)(unsigned int cpu),
- int (*teardown)(unsigned int cpu),
- bool multi_instance)
+/*
+ * Returns a free for dynamic slot assignment of the Online state. The states
+ * are protected by the cpuhp_slot_states mutex and an empty slot is identified
+ * by having no name assigned.
+ */
+static int cpuhp_reserve_state(enum cpuhp_state state)
+{
+ enum cpuhp_state i;
+
+ for (i = CPUHP_AP_ONLINE_DYN; i <= CPUHP_AP_ONLINE_DYN_END; i++) {
+ if (!cpuhp_ap_states[i].name)
+ return i;
+ }
+ WARN(1, "No more dynamic states available for CPU hotplug\n");
+ return -ENOSPC;
+}
+
+static int cpuhp_store_callbacks(enum cpuhp_state state, const char *name,
+ int (*startup)(unsigned int cpu),
+ int (*teardown)(unsigned int cpu),
+ bool multi_instance)
{
/* (Un)Install the callbacks for further cpu hotplug operations */
struct cpuhp_step *sp;
+ int ret = 0;
mutex_lock(&cpuhp_state_mutex);
+
+ if (state == CPUHP_AP_ONLINE_DYN) {
+ ret = cpuhp_reserve_state(state);
+ if (ret < 0)
+ goto out;
+ state = ret;
+ }
sp = cpuhp_get_step(state);
+ if (name && sp->name) {
+ ret = -EBUSY;
+ goto out;
+ }
sp->startup.single = startup;
sp->teardown.single = teardown;
sp->name = name;
sp->multi_instance = multi_instance;
INIT_HLIST_HEAD(&sp->list);
+out:
mutex_unlock(&cpuhp_state_mutex);
+ return ret;
}
static void *cpuhp_get_teardown_cb(enum cpuhp_state state)
@@ -1509,29 +1402,6 @@ static void cpuhp_rollback_install(int failedcpu, enum cpuhp_state state,
}
}
-/*
- * Returns a free for dynamic slot assignment of the Online state. The states
- * are protected by the cpuhp_slot_states mutex and an empty slot is identified
- * by having no name assigned.
- */
-static int cpuhp_reserve_state(enum cpuhp_state state)
-{
- enum cpuhp_state i;
-
- mutex_lock(&cpuhp_state_mutex);
- for (i = CPUHP_AP_ONLINE_DYN; i <= CPUHP_AP_ONLINE_DYN_END; i++) {
- if (cpuhp_ap_states[i].name)
- continue;
-
- cpuhp_ap_states[i].name = "Reserved";
- mutex_unlock(&cpuhp_state_mutex);
- return i;
- }
- mutex_unlock(&cpuhp_state_mutex);
- WARN(1, "No more dynamic states available for CPU hotplug\n");
- return -ENOSPC;
-}
-
int __cpuhp_state_add_instance(enum cpuhp_state state, struct hlist_node *node,
bool invoke)
{
@@ -1580,11 +1450,13 @@ EXPORT_SYMBOL_GPL(__cpuhp_state_add_instance);
/**
* __cpuhp_setup_state - Setup the callbacks for an hotplug machine state
- * @state: The state to setup
- * @invoke: If true, the startup function is invoked for cpus where
- * cpu state >= @state
- * @startup: startup callback function
- * @teardown: teardown callback function
+ * @state: The state to setup
+ * @invoke: If true, the startup function is invoked for cpus where
+ * cpu state >= @state
+ * @startup: startup callback function
+ * @teardown: teardown callback function
+ * @multi_instance: State is set up for multiple instances which get
+ * added afterwards.
*
* Returns:
* On success:
@@ -1599,25 +1471,16 @@ int __cpuhp_setup_state(enum cpuhp_state state,
bool multi_instance)
{
int cpu, ret = 0;
- int dyn_state = 0;
if (cpuhp_cb_check(state) || !name)
return -EINVAL;
get_online_cpus();
- /* currently assignments for the ONLINE state are possible */
- if (state == CPUHP_AP_ONLINE_DYN) {
- dyn_state = 1;
- ret = cpuhp_reserve_state(state);
- if (ret < 0)
- goto out;
- state = ret;
- }
+ ret = cpuhp_store_callbacks(state, name, startup, teardown,
+ multi_instance);
- cpuhp_store_callbacks(state, name, startup, teardown, multi_instance);
-
- if (!invoke || !startup)
+ if (ret || !invoke || !startup)
goto out;
/*
@@ -1641,7 +1504,11 @@ int __cpuhp_setup_state(enum cpuhp_state state,
}
out:
put_online_cpus();
- if (!ret && dyn_state)
+ /*
+ * If the requested state is CPUHP_AP_ONLINE_DYN, return the
+ * dynamically allocated state in case of success.
+ */
+ if (!ret && state == CPUHP_AP_ONLINE_DYN)
return state;
return ret;
}
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index cb66a4648840..b06848a104e6 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -1538,30 +1538,6 @@ config NOTIFIER_ERROR_INJECTION
Say N if unsure.
-config CPU_NOTIFIER_ERROR_INJECT
- tristate "CPU notifier error injection module"
- depends on HOTPLUG_CPU && NOTIFIER_ERROR_INJECTION
- help
- This option provides a kernel module that can be used to test
- the error handling of the cpu notifiers by injecting artificial
- errors to CPU notifier chain callbacks. It is controlled through
- debugfs interface under /sys/kernel/debug/notifier-error-inject/cpu
-
- If the notifier call chain should be failed with some events
- notified, write the error code to "actions/<notifier event>/error".
-
- Example: Inject CPU offline error (-1 == -EPERM)
-
- # cd /sys/kernel/debug/notifier-error-inject/cpu
- # echo -1 > actions/CPU_DOWN_PREPARE/error
- # echo 0 > /sys/devices/system/cpu/cpu1/online
- bash: echo: write error: Operation not permitted
-
- To compile this code as a module, choose M here: the module will
- be called cpu-notifier-error-inject.
-
- If unsure, say N.
-
config PM_NOTIFIER_ERROR_INJECT
tristate "PM notifier error injection module"
depends on PM && NOTIFIER_ERROR_INJECTION
diff --git a/lib/Makefile b/lib/Makefile
index 50144a3aeebd..bc4073a8cd08 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -128,7 +128,6 @@ obj-$(CONFIG_SWIOTLB) += swiotlb.o
obj-$(CONFIG_IOMMU_HELPER) += iommu-helper.o iommu-common.o
obj-$(CONFIG_FAULT_INJECTION) += fault-inject.o
obj-$(CONFIG_NOTIFIER_ERROR_INJECTION) += notifier-error-inject.o
-obj-$(CONFIG_CPU_NOTIFIER_ERROR_INJECT) += cpu-notifier-error-inject.o
obj-$(CONFIG_PM_NOTIFIER_ERROR_INJECT) += pm-notifier-error-inject.o
obj-$(CONFIG_NETDEV_NOTIFIER_ERROR_INJECT) += netdev-notifier-error-inject.o
obj-$(CONFIG_MEMORY_NOTIFIER_ERROR_INJECT) += memory-notifier-error-inject.o
diff --git a/lib/cpu-notifier-error-inject.c b/lib/cpu-notifier-error-inject.c
deleted file mode 100644
index 0e2c9a1e958a..000000000000
--- a/lib/cpu-notifier-error-inject.c
+++ /dev/null
@@ -1,84 +0,0 @@
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/cpu.h>
-
-#include "notifier-error-inject.h"
-
-static int priority;
-module_param(priority, int, 0);
-MODULE_PARM_DESC(priority, "specify cpu notifier priority");
-
-#define UP_PREPARE 0
-#define UP_PREPARE_FROZEN 0
-#define DOWN_PREPARE 0
-#define DOWN_PREPARE_FROZEN 0
-
-static struct notifier_err_inject cpu_notifier_err_inject = {
- .actions = {
- { NOTIFIER_ERR_INJECT_ACTION(UP_PREPARE) },
- { NOTIFIER_ERR_INJECT_ACTION(UP_PREPARE_FROZEN) },
- { NOTIFIER_ERR_INJECT_ACTION(DOWN_PREPARE) },
- { NOTIFIER_ERR_INJECT_ACTION(DOWN_PREPARE_FROZEN) },
- {}
- }
-};
-
-static int notf_err_handle(struct notifier_err_inject_action *action)
-{
- int ret;
-
- ret = action->error;
- if (ret)
- pr_info("Injecting error (%d) to %s\n", ret, action->name);
- return ret;
-}
-
-static int notf_err_inj_up_prepare(unsigned int cpu)
-{
- if (!cpuhp_tasks_frozen)
- return notf_err_handle(&cpu_notifier_err_inject.actions[0]);
- else
- return notf_err_handle(&cpu_notifier_err_inject.actions[1]);
-}
-
-static int notf_err_inj_dead(unsigned int cpu)
-{
- if (!cpuhp_tasks_frozen)
- return notf_err_handle(&cpu_notifier_err_inject.actions[2]);
- else
- return notf_err_handle(&cpu_notifier_err_inject.actions[3]);
-}
-
-static struct dentry *dir;
-
-static int err_inject_init(void)
-{
- int err;
-
- dir = notifier_err_inject_init("cpu", notifier_err_inject_dir,
- &cpu_notifier_err_inject, priority);
- if (IS_ERR(dir))
- return PTR_ERR(dir);
-
- err = cpuhp_setup_state_nocalls(CPUHP_NOTF_ERR_INJ_PREPARE,
- "cpu-err-notif:prepare",
- notf_err_inj_up_prepare,
- notf_err_inj_dead);
- if (err)
- debugfs_remove_recursive(dir);
-
- return err;
-}
-
-static void err_inject_exit(void)
-{
- cpuhp_remove_state_nocalls(CPUHP_NOTF_ERR_INJ_PREPARE);
- debugfs_remove_recursive(dir);
-}
-
-module_init(err_inject_init);
-module_exit(err_inject_exit);
-
-MODULE_DESCRIPTION("CPU notifier error injection module");
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Akinobu Mita <akinobu.mita@...il.com>");
diff --git a/virt/kvm/arm/arch_timer.c b/virt/kvm/arm/arch_timer.c
index ae95fc0e3214..5b4f60d43314 100644
--- a/virt/kvm/arm/arch_timer.c
+++ b/virt/kvm/arm/arch_timer.c
@@ -456,7 +456,7 @@ int kvm_timer_hyp_init(void)
kvm_info("virtual timer IRQ%d\n", host_vtimer_irq);
cpuhp_setup_state(CPUHP_AP_KVM_ARM_TIMER_STARTING,
- "AP_KVM_ARM_TIMER_STARTING", kvm_timer_starting_cpu,
+ "kvm/arm/timer:starting", kvm_timer_starting_cpu,
kvm_timer_dying_cpu);
return err;
}
diff --git a/virt/kvm/arm/vgic/vgic-init.c b/virt/kvm/arm/vgic/vgic-init.c
index 8cebfbc19e90..5114391b7e5a 100644
--- a/virt/kvm/arm/vgic/vgic-init.c
+++ b/virt/kvm/arm/vgic/vgic-init.c
@@ -428,7 +428,7 @@ int kvm_vgic_hyp_init(void)
}
ret = cpuhp_setup_state(CPUHP_AP_KVM_ARM_VGIC_INIT_STARTING,
- "AP_KVM_ARM_VGIC_INIT_STARTING",
+ "kvm/arm/vgic:starting",
vgic_init_cpu_starting, vgic_init_cpu_dying);
if (ret) {
kvm_err("Cannot register vgic CPU notifier\n");
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index de102cae7125..ec298b7ca556 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -3944,7 +3944,7 @@ int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
goto out_free_1;
}
- r = cpuhp_setup_state_nocalls(CPUHP_AP_KVM_STARTING, "AP_KVM_STARTING",
+ r = cpuhp_setup_state_nocalls(CPUHP_AP_KVM_STARTING, "kvm/cpu:starting",
kvm_starting_cpu, kvm_dying_cpu);
if (r)
goto out_free_2;
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