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Date: Sat, 6 Oct 2012 23:27:35 +0800
From: Jiang Liu <liuj97@...il.com>
To: Yinghai Lu <yinghai@...nel.org>,
Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>,
Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>,
Wen Congyang <wency@...fujitsu.com>,
Tang Chen <tangchen@...fujitsu.com>,
Taku Izumi <izumi.taku@...fujitsu.com>
Cc: Hanjun Guo <guohanjun@...wei.com>,
Yijing Wang <wangyijing@...wei.com>,
Gong Chen <gong.chen@...ux.intel.com>,
Jiang Liu <jiang.liu@...wei.com>,
Tony Luck <tony.luck@...el.com>,
Huang Ying <ying.huang@...el.com>,
Bob Moore <robert.moore@...el.com>,
Len Brown <lenb@...nel.org>,
"Srivatsa S . Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>,
Bjorn Helgaas <bhelgaas@...gle.com>,
linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
linux-pci@...r.kernel.org
Subject: [RFC PATCH v3 27/28] x86: simplify _acpi_map_lsapic()
Simplify implementation of function _acpi_map_lsapic().
Signed-off-by: Jiang Liu <jiang.liu@...wei.com>
---
arch/x86/include/asm/mpspec.h | 2 +-
arch/x86/kernel/acpi/boot.c | 44 +++++++++--------------------------------
arch/x86/kernel/apic/apic.c | 8 +++++---
3 files changed, 15 insertions(+), 39 deletions(-)
diff --git a/arch/x86/include/asm/mpspec.h b/arch/x86/include/asm/mpspec.h
index 3e2f42a..f1d6487 100644
--- a/arch/x86/include/asm/mpspec.h
+++ b/arch/x86/include/asm/mpspec.h
@@ -94,7 +94,7 @@ static inline void early_reserve_e820_mpc_new(void) { }
#define default_get_smp_config x86_init_uint_noop
#endif
-void __cpuinit generic_processor_info(int apicid, int version);
+int __cpuinit generic_processor_info(int apicid, int version);
#ifdef CONFIG_ACPI
extern void mp_register_ioapic(int id, u32 address, u32 gsi_base);
extern void mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index 5e76952..f354446 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -195,24 +195,24 @@ static int __init acpi_parse_madt(struct acpi_table_header *table)
return 0;
}
-static void __cpuinit acpi_register_lapic(int id, u8 enabled)
+static int __cpuinit acpi_register_lapic(int id, u8 enabled)
{
unsigned int ver = 0;
if (id >= (MAX_LOCAL_APIC-1)) {
printk(KERN_INFO PREFIX "skipped apicid that is too big\n");
- return;
+ return -1;
}
if (!enabled) {
++disabled_cpus;
- return;
+ return -1;
}
if (boot_cpu_physical_apicid != -1U)
ver = apic_version[boot_cpu_physical_apicid];
- generic_processor_info(id, ver);
+ return generic_processor_info(id, ver);
}
static int __init
@@ -610,44 +610,19 @@ static void __cpuinit acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
{
- cpumask_var_t tmp_map, new_map;
int cpu;
- int retval = -ENOMEM;
- if (!alloc_cpumask_var(&tmp_map, GFP_KERNEL))
- goto out;
-
- if (!alloc_cpumask_var(&new_map, GFP_KERNEL))
- goto free_tmp_map;
-
- cpumask_copy(tmp_map, cpu_present_mask);
- acpi_register_lapic(physid, ACPI_MADT_ENABLED);
-
- /*
- * If acpi_register_lapic successfully generates a new logical cpu
- * number, then the following will get us exactly what was mapped
- */
- cpumask_andnot(new_map, cpu_present_mask, tmp_map);
- if (cpumask_empty(new_map)) {
+ cpu = acpi_register_lapic(physid, ACPI_MADT_ENABLED);
+ if (cpu == -1) {
printk ("Unable to map lapic to logical cpu number\n");
- retval = -EINVAL;
- goto free_new_map;
+ return -EINVAL;
}
acpi_processor_set_pdc(handle);
-
- cpu = cpumask_first(new_map);
acpi_map_cpu2node(handle, cpu, physid);
-
*pcpu = cpu;
- retval = 0;
-
-free_new_map:
- free_cpumask_var(new_map);
-free_tmp_map:
- free_cpumask_var(tmp_map);
-out:
- return retval;
+
+ return 0;
}
/* wrapper to silence section mismatch warning */
@@ -665,7 +640,6 @@ int acpi_unmap_lsapic(int cpu)
return (0);
}
-
EXPORT_SYMBOL(acpi_unmap_lsapic);
#endif /* CONFIG_ACPI_HOTPLUG_CPU */
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index b17416e..9fdc293 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -2030,7 +2030,7 @@ void disconnect_bsp_APIC(int virt_wire_setup)
apic_write(APIC_LVT1, value);
}
-void __cpuinit generic_processor_info(int apicid, int version)
+int __cpuinit generic_processor_info(int apicid, int version)
{
int cpu, max = nr_cpu_ids;
bool boot_cpu_detected = physid_isset(boot_cpu_physical_apicid,
@@ -2050,7 +2050,7 @@ void __cpuinit generic_processor_info(int apicid, int version)
" Processor %d/0x%x ignored.\n", max, thiscpu, apicid);
disabled_cpus++;
- return;
+ return -1;
}
if (num_processors >= nr_cpu_ids) {
@@ -2061,7 +2061,7 @@ void __cpuinit generic_processor_info(int apicid, int version)
" Processor %d/0x%x ignored.\n", max, thiscpu, apicid);
disabled_cpus++;
- return;
+ return -1;
}
num_processors++;
@@ -2106,6 +2106,8 @@ void __cpuinit generic_processor_info(int apicid, int version)
#endif
set_cpu_possible(cpu, true);
set_cpu_present(cpu, true);
+
+ return cpu;
}
int hard_smp_processor_id(void)
--
1.7.9.5
--
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