diff options
Diffstat (limited to 'lib/percpu_counter.c')
| -rw-r--r-- | lib/percpu_counter.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/lib/percpu_counter.c b/lib/percpu_counter.c index 9c21000df0b5..3bf4a9984f4c 100644 --- a/lib/percpu_counter.c +++ b/lib/percpu_counter.c @@ -72,7 +72,14 @@ void percpu_counter_set(struct percpu_counter *fbc, s64 amount) } EXPORT_SYMBOL(percpu_counter_set); -void __percpu_counter_add(struct percpu_counter *fbc, s64 amount, s32 batch) +/** + * This function is both preempt and irq safe. The former is due to explicit + * preemption disable. The latter is guaranteed by the fact that the slow path + * is explicitly protected by an irq-safe spinlock whereas the fast patch uses + * this_cpu_add which is irq-safe by definition. Hence there is no need muck + * with irq state before calling this one + */ +void percpu_counter_add_batch(struct percpu_counter *fbc, s64 amount, s32 batch) { s64 count; @@ -89,7 +96,7 @@ void __percpu_counter_add(struct percpu_counter *fbc, s64 amount, s32 batch) } preempt_enable(); } -EXPORT_SYMBOL(__percpu_counter_add); +EXPORT_SYMBOL(percpu_counter_add_batch); /* * Add up all the per-cpu counts, return the result. This is a more accurate |