wb_stat_sum disables interrupts and calls __wb_stat_sum which eventually calls
__percpu_counter_sum. However, the percpu routine is already irq-safe. Simplify
the code a bit by making wb_stat_sum directly call percpu_counter_sum_positive
and not disable interrupts. Also remove the now-uneeded __wb_stat_sum which was
just a wrapper over percpu_counter_sum_positive
Signed-off-by: Nikolay Borisov <nbori...@suse.com>
---
include/linux/backing-dev.h | 15 +--------------
1 file changed, 1 insertion(+), 14 deletions(-)
diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h
index e9c967b86054..854e1bdd0b2a 100644
--- a/include/linux/backing-dev.h
+++ b/include/linux/backing-dev.h
@@ -84,22 +84,9 @@ static inline s64 wb_stat(struct bdi_writeback *wb, enum
wb_stat_item item)
return percpu_counter_read_positive(&wb->stat[item]);
}
-static inline s64 __wb_stat_sum(struct bdi_writeback *wb,
- enum wb_stat_item item)
-{
- return percpu_counter_sum_positive(&wb->stat[item]);
-}
-
static inline s64 wb_stat_sum(struct bdi_writeback *wb, enum wb_stat_item item)
{
- s64 sum;
- unsigned long flags;
-
- local_irq_save(flags);
- sum = __wb_stat_sum(wb, item);
- local_irq_restore(flags);
-
- return sum;
+ return percpu_counter_sum_positive(&wb->stat[item]);
}
extern void wb_writeout_inc(struct bdi_writeback *wb);
--
2.7.4
