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>
diff --git a/mm/slab.c b/mm/slab.c
index 7dfa481..211b174 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -685,7 +685,7 @@
return g_cpucache_up >= EARLY;
}
-static DEFINE_PER_CPU(struct delayed_work, reap_work);
+static DEFINE_PER_CPU(struct delayed_work, slab_reap_work);
static inline struct array_cache *cpu_cache_get(struct kmem_cache *cachep)
{
@@ -826,7 +826,7 @@
* objects freed on different nodes from which they were allocated) and the
* flushing of remote pcps by calling drain_node_pages.
*/
-static DEFINE_PER_CPU(unsigned long, reap_node);
+static DEFINE_PER_CPU(unsigned long, slab_reap_node);
static void init_reap_node(int cpu)
{
@@ -836,17 +836,17 @@
if (node == MAX_NUMNODES)
node = first_node(node_online_map);
- per_cpu(reap_node, cpu) = node;
+ per_cpu(slab_reap_node, cpu) = node;
}
static void next_reap_node(void)
{
- int node = __get_cpu_var(reap_node);
+ int node = __get_cpu_var(slab_reap_node);
node = next_node(node, node_online_map);
if (unlikely(node >= MAX_NUMNODES))
node = first_node(node_online_map);
- __get_cpu_var(reap_node) = node;
+ __get_cpu_var(slab_reap_node) = node;
}
#else
@@ -863,7 +863,7 @@
*/
static void __cpuinit start_cpu_timer(int cpu)
{
- struct delayed_work *reap_work = &per_cpu(reap_work, cpu);
+ struct delayed_work *reap_work = &per_cpu(slab_reap_work, cpu);
/*
* When this gets called from do_initcalls via cpucache_init(),
@@ -1027,7 +1027,7 @@
*/
static void reap_alien(struct kmem_cache *cachep, struct kmem_list3 *l3)
{
- int node = __get_cpu_var(reap_node);
+ int node = __get_cpu_var(slab_reap_node);
if (l3->alien) {
struct array_cache *ac = l3->alien[node];
@@ -1286,9 +1286,9 @@
* anything expensive but will only modify reap_work
* and reschedule the timer.
*/
- cancel_rearming_delayed_work(&per_cpu(reap_work, cpu));
+ cancel_rearming_delayed_work(&per_cpu(slab_reap_work, cpu));
/* Now the cache_reaper is guaranteed to be not running. */
- per_cpu(reap_work, cpu).work.func = NULL;
+ per_cpu(slab_reap_work, cpu).work.func = NULL;
break;
case CPU_DOWN_FAILED:
case CPU_DOWN_FAILED_FROZEN: