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authorTejun Heo <tj@kernel.org>2009-10-29 22:34:13 +0900
committerTejun Heo <tj@kernel.org>2009-10-29 22:34:13 +0900
commit1871e52c76dd95895caeb772f845a1718dcbcd75 (patch)
tree49e8148326f65353e673204f427bd4545eb26c16 /kernel/time/timer_stats.c
parent0f5e4816dbf38ce9488e611ca2296925c1e90d5e (diff)
percpu: make percpu symbols under kernel/ and mm/ unique
This patch updates percpu related symbols under kernel/ and mm/ such that percpu symbols are unique and don't clash with local symbols. This serves two purposes of decreasing the possibility of global percpu symbol collision and allowing dropping per_cpu__ prefix from percpu symbols. * kernel/lockdep.c: s/lock_stats/cpu_lock_stats/ * kernel/sched.c: s/init_rq_rt/init_rt_rq_var/ (any better idea?) s/sched_group_cpus/sched_groups/ * kernel/softirq.c: s/ksoftirqd/run_ksoftirqd/a * kernel/softlockup.c: s/(*)_timestamp/softlockup_\1_ts/ s/watchdog_task/softlockup_watchdog/ s/timestamp/ts/ for local variables * kernel/time/timer_stats: s/lookup_lock/tstats_lookup_lock/ * mm/slab.c: s/reap_work/slab_reap_work/ s/reap_node/slab_reap_node/ * mm/vmstat.c: local variable changed to avoid collision with vmstat_work Partly based on Rusty Russell's "alloc_percpu: rename percpu vars which cause name clashes" patch. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: (slab/vmstat) Christoph Lameter <cl@linux-foundation.org> Reviewed-by: Christoph Lameter <cl@linux-foundation.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Ingo Molnar <mingo@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Nick Piggin <npiggin@suse.de>
Diffstat (limited to 'kernel/time/timer_stats.c')
-rw-r--r--kernel/time/timer_stats.c11
1 files changed, 6 insertions, 5 deletions
diff --git a/kernel/time/timer_stats.c b/kernel/time/timer_stats.c
index ee5681f8d7ec..63b117e9eba1 100644
--- a/kernel/time/timer_stats.c
+++ b/kernel/time/timer_stats.c
@@ -86,7 +86,7 @@ static DEFINE_SPINLOCK(table_lock);
/*
* Per-CPU lookup locks for fast hash lookup:
*/
-static DEFINE_PER_CPU(spinlock_t, lookup_lock);
+static DEFINE_PER_CPU(spinlock_t, tstats_lookup_lock);
/*
* Mutex to serialize state changes with show-stats activities:
@@ -245,7 +245,7 @@ void timer_stats_update_stats(void *timer, pid_t pid, void *startf,
if (likely(!timer_stats_active))
return;
- lock = &per_cpu(lookup_lock, raw_smp_processor_id());
+ lock = &per_cpu(tstats_lookup_lock, raw_smp_processor_id());
input.timer = timer;
input.start_func = startf;
@@ -348,9 +348,10 @@ static void sync_access(void)
int cpu;
for_each_online_cpu(cpu) {
- spin_lock_irqsave(&per_cpu(lookup_lock, cpu), flags);
+ spinlock_t *lock = &per_cpu(tstats_lookup_lock, cpu);
+ spin_lock_irqsave(lock, flags);
/* nothing */
- spin_unlock_irqrestore(&per_cpu(lookup_lock, cpu), flags);
+ spin_unlock_irqrestore(lock, flags);
}
}
@@ -408,7 +409,7 @@ void __init init_timer_stats(void)
int cpu;
for_each_possible_cpu(cpu)
- spin_lock_init(&per_cpu(lookup_lock, cpu));
+ spin_lock_init(&per_cpu(tstats_lookup_lock, cpu));
}
static int __init init_tstats_procfs(void)