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Date: Sun, 02 Nov 2014 08:31:37 +0100
From: Mike Galbraith <umgwanakikbuti@...il.com>
To: Steven Rostedt <rostedt@...dmis.org>
Cc: LKML <linux-kernel@...r.kernel.org>,
linux-rt-users <linux-rt-users@...r.kernel.org>,
Thomas Gleixner <tglx@...utronix.de>,
Carsten Emde <C.Emde@...dl.org>,
John Kacur <jkacur@...hat.com>,
Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
Clark Williams <williams@...hat.com>
Subject: 3.14.23-rt20 - x86, UV: raw_spinlock conversion
Shrug. Lots of hobbyists have a beast in their basement, right?
From: Mike Galbraith <mgalbraith@...e.de>
Date: Mon Dec 5 10:01:47 CET 2011
Subject: x86, UV: raw_spinlock conversion
Signed-off-by: Mike Galbraith <mgalbraith@...e.de>
---
arch/x86/include/asm/uv/uv_bau.h | 14 +++++++-------
arch/x86/include/asm/uv/uv_hub.h | 2 +-
arch/x86/kernel/apic/x2apic_uv_x.c | 2 +-
arch/x86/platform/uv/tlb_uv.c | 26 +++++++++++++-------------
arch/x86/platform/uv/uv_time.c | 21 +++++++++++++--------
5 files changed, 35 insertions(+), 30 deletions(-)
--- a/arch/x86/include/asm/uv/uv_bau.h
+++ b/arch/x86/include/asm/uv/uv_bau.h
@@ -611,9 +611,9 @@ struct bau_control {
cycles_t send_message;
cycles_t period_end;
cycles_t period_time;
- spinlock_t uvhub_lock;
- spinlock_t queue_lock;
- spinlock_t disable_lock;
+ raw_spinlock_t uvhub_lock;
+ raw_spinlock_t queue_lock;
+ raw_spinlock_t disable_lock;
/* tunables */
int max_concurr;
int max_concurr_const;
@@ -773,15 +773,15 @@ static inline int atom_asr(short i, stru
* to be lowered below the current 'v'. atomic_add_unless can only stop
* on equal.
*/
-static inline int atomic_inc_unless_ge(spinlock_t *lock, atomic_t *v, int u)
+static inline int atomic_inc_unless_ge(raw_spinlock_t *lock, atomic_t *v, int u)
{
- spin_lock(lock);
+ raw_spin_lock(lock);
if (atomic_read(v) >= u) {
- spin_unlock(lock);
+ raw_spin_unlock(lock);
return 0;
}
atomic_inc(v);
- spin_unlock(lock);
+ raw_spin_unlock(lock);
return 1;
}
--- a/arch/x86/include/asm/uv/uv_hub.h
+++ b/arch/x86/include/asm/uv/uv_hub.h
@@ -502,7 +502,7 @@ struct uv_blade_info {
unsigned short nr_online_cpus;
unsigned short pnode;
short memory_nid;
- spinlock_t nmi_lock; /* obsolete, see uv_hub_nmi */
+ raw_spinlock_t nmi_lock; /* obsolete, see uv_hub_nmi */
unsigned long nmi_count; /* obsolete, see uv_hub_nmi */
};
extern struct uv_blade_info *uv_blade_info;
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -911,7 +911,7 @@ void __init uv_system_init(void)
uv_blade_info[blade].pnode = pnode;
uv_blade_info[blade].nr_possible_cpus = 0;
uv_blade_info[blade].nr_online_cpus = 0;
- spin_lock_init(&uv_blade_info[blade].nmi_lock);
+ raw_spin_lock_init(&uv_blade_info[blade].nmi_lock);
min_pnode = min(pnode, min_pnode);
max_pnode = max(pnode, max_pnode);
blade++;
--- a/arch/x86/platform/uv/tlb_uv.c
+++ b/arch/x86/platform/uv/tlb_uv.c
@@ -719,9 +719,9 @@ static void destination_plugged(struct b
quiesce_local_uvhub(hmaster);
- spin_lock(&hmaster->queue_lock);
+ raw_spin_lock(&hmaster->queue_lock);
reset_with_ipi(&bau_desc->distribution, bcp);
- spin_unlock(&hmaster->queue_lock);
+ raw_spin_unlock(&hmaster->queue_lock);
end_uvhub_quiesce(hmaster);
@@ -741,9 +741,9 @@ static void destination_timeout(struct b
quiesce_local_uvhub(hmaster);
- spin_lock(&hmaster->queue_lock);
+ raw_spin_lock(&hmaster->queue_lock);
reset_with_ipi(&bau_desc->distribution, bcp);
- spin_unlock(&hmaster->queue_lock);
+ raw_spin_unlock(&hmaster->queue_lock);
end_uvhub_quiesce(hmaster);
@@ -764,7 +764,7 @@ static void disable_for_period(struct ba
cycles_t tm1;
hmaster = bcp->uvhub_master;
- spin_lock(&hmaster->disable_lock);
+ raw_spin_lock(&hmaster->disable_lock);
if (!bcp->baudisabled) {
stat->s_bau_disabled++;
tm1 = get_cycles();
@@ -777,7 +777,7 @@ static void disable_for_period(struct ba
}
}
}
- spin_unlock(&hmaster->disable_lock);
+ raw_spin_unlock(&hmaster->disable_lock);
}
static void count_max_concurr(int stat, struct bau_control *bcp,
@@ -840,7 +840,7 @@ static void record_send_stats(cycles_t t
*/
static void uv1_throttle(struct bau_control *hmaster, struct ptc_stats *stat)
{
- spinlock_t *lock = &hmaster->uvhub_lock;
+ raw_spinlock_t *lock = &hmaster->uvhub_lock;
atomic_t *v;
v = &hmaster->active_descriptor_count;
@@ -972,7 +972,7 @@ static int check_enable(struct bau_contr
struct bau_control *hmaster;
hmaster = bcp->uvhub_master;
- spin_lock(&hmaster->disable_lock);
+ raw_spin_lock(&hmaster->disable_lock);
if (bcp->baudisabled && (get_cycles() >= bcp->set_bau_on_time)) {
stat->s_bau_reenabled++;
for_each_present_cpu(tcpu) {
@@ -984,10 +984,10 @@ static int check_enable(struct bau_contr
tbcp->period_giveups = 0;
}
}
- spin_unlock(&hmaster->disable_lock);
+ raw_spin_unlock(&hmaster->disable_lock);
return 0;
}
- spin_unlock(&hmaster->disable_lock);
+ raw_spin_unlock(&hmaster->disable_lock);
return -1;
}
@@ -1895,9 +1895,9 @@ static void __init init_per_cpu_tunables
bcp->cong_reps = congested_reps;
bcp->disabled_period = sec_2_cycles(disabled_period);
bcp->giveup_limit = giveup_limit;
- spin_lock_init(&bcp->queue_lock);
- spin_lock_init(&bcp->uvhub_lock);
- spin_lock_init(&bcp->disable_lock);
+ raw_spin_lock_init(&bcp->queue_lock);
+ raw_spin_lock_init(&bcp->uvhub_lock);
+ raw_spin_lock_init(&bcp->disable_lock);
}
}
--- a/arch/x86/platform/uv/uv_time.c
+++ b/arch/x86/platform/uv/uv_time.c
@@ -58,7 +58,7 @@ static DEFINE_PER_CPU(struct clock_event
/* There is one of these allocated per node */
struct uv_rtc_timer_head {
- spinlock_t lock;
+ raw_spinlock_t lock;
/* next cpu waiting for timer, local node relative: */
int next_cpu;
/* number of cpus on this node: */
@@ -178,7 +178,7 @@ static __init int uv_rtc_allocate_timers
uv_rtc_deallocate_timers();
return -ENOMEM;
}
- spin_lock_init(&head->lock);
+ raw_spin_lock_init(&head->lock);
head->ncpus = uv_blade_nr_possible_cpus(bid);
head->next_cpu = -1;
blade_info[bid] = head;
@@ -232,7 +232,7 @@ static int uv_rtc_set_timer(int cpu, u64
unsigned long flags;
int next_cpu;
- spin_lock_irqsave(&head->lock, flags);
+ raw_spin_lock_irqsave(&head->lock, flags);
next_cpu = head->next_cpu;
*t = expires;
@@ -244,12 +244,12 @@ static int uv_rtc_set_timer(int cpu, u64
if (uv_setup_intr(cpu, expires)) {
*t = ULLONG_MAX;
uv_rtc_find_next_timer(head, pnode);
- spin_unlock_irqrestore(&head->lock, flags);
+ raw_spin_unlock_irqrestore(&head->lock, flags);
return -ETIME;
}
}
- spin_unlock_irqrestore(&head->lock, flags);
+ raw_spin_unlock_irqrestore(&head->lock, flags);
return 0;
}
@@ -268,7 +268,7 @@ static int uv_rtc_unset_timer(int cpu, i
unsigned long flags;
int rc = 0;
- spin_lock_irqsave(&head->lock, flags);
+ raw_spin_lock_irqsave(&head->lock, flags);
if ((head->next_cpu == bcpu && uv_read_rtc(NULL) >= *t) || force)
rc = 1;
@@ -280,7 +280,7 @@ static int uv_rtc_unset_timer(int cpu, i
uv_rtc_find_next_timer(head, pnode);
}
- spin_unlock_irqrestore(&head->lock, flags);
+ raw_spin_unlock_irqrestore(&head->lock, flags);
return rc;
}
@@ -300,13 +300,18 @@ static int uv_rtc_unset_timer(int cpu, i
static cycle_t uv_read_rtc(struct clocksource *cs)
{
unsigned long offset;
+ cycle_t cycles;
+ migrate_disable();
if (uv_get_min_hub_revision_id() == 1)
offset = 0;
else
offset = (uv_blade_processor_id() * L1_CACHE_BYTES) % PAGE_SIZE;
- return (cycle_t)uv_read_local_mmr(UVH_RTC | offset);
+ cycles = (cycle_t)uv_read_local_mmr(UVH_RTC | offset);
+ migrate_enable();
+
+ return cycles;
}
/*
--
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