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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2007-10-16 23:25:45 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-17 08:42:44 -0700 |
| commit | 833f4077bf7c2dcff6e31526e03ec2ad91c88581 (patch) | |
| tree | 80916540be846267342c3e5e4a6255c2c18b44d5 /lib/percpu_counter.c | |
| parent | bf1d89c81352f6eca72d0c10cfee3dba29ef5efb (diff) | |
| download | linux-833f4077bf7c2dcff6e31526e03ec2ad91c88581.tar.gz linux-833f4077bf7c2dcff6e31526e03ec2ad91c88581.tar.bz2 linux-833f4077bf7c2dcff6e31526e03ec2ad91c88581.zip | |
lib: percpu_counter_init error handling
alloc_percpu can fail, propagate that error.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/percpu_counter.c')
| -rw-r--r-- | lib/percpu_counter.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/lib/percpu_counter.c b/lib/percpu_counter.c index 3b0ed80c1efd..3a59d84b2d1e 100644 --- a/lib/percpu_counter.c +++ b/lib/percpu_counter.c @@ -68,21 +68,27 @@ s64 __percpu_counter_sum(struct percpu_counter *fbc) } EXPORT_SYMBOL(__percpu_counter_sum); -void percpu_counter_init(struct percpu_counter *fbc, s64 amount) +int percpu_counter_init(struct percpu_counter *fbc, s64 amount) { spin_lock_init(&fbc->lock); fbc->count = amount; fbc->counters = alloc_percpu(s32); + if (!fbc->counters) + return -ENOMEM; #ifdef CONFIG_HOTPLUG_CPU mutex_lock(&percpu_counters_lock); list_add(&fbc->list, &percpu_counters); mutex_unlock(&percpu_counters_lock); #endif + return 0; } EXPORT_SYMBOL(percpu_counter_init); void percpu_counter_destroy(struct percpu_counter *fbc) { + if (!fbc->counters) + return; + free_percpu(fbc->counters); #ifdef CONFIG_HOTPLUG_CPU mutex_lock(&percpu_counters_lock); |