diff options
| author | Christophe JAILLET <christophe.jaillet@wanadoo.fr> | 2022-01-14 23:05:26 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-01-15 15:30:26 +0100 |
| commit | 3795f46b83c66a2e4545460dec74c80b839faafe (patch) | |
| tree | 76b8b02f02479498f1a65d372bd944cb623aa20e /mm/frontswap.c | |
| parent | shmem: fix a race between shmem_unused_huge_shrink and shmem_evict_inode (diff) | |
| download | linux-3795f46b83c66a2e4545460dec74c80b839faafe.tar.xz linux-3795f46b83c66a2e4545460dec74c80b839faafe.zip | |
mm/frontswap.c: use non-atomic '__set_bit()' when possible
The 'a' and 'b' bitmaps are local to this function, so no concurrent
access can occur. So the non-atomic '__set_bit()' can be used to save a
few cycles.
Link: https://lkml.kernel.org/r/e52476da5cee57151745c5c3c934a69798dc6fa4.1638132190.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/frontswap.c')
| -rw-r--r-- | mm/frontswap.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/frontswap.c b/mm/frontswap.c index 130e301c5ac0..6bed12260dea 100644 --- a/mm/frontswap.c +++ b/mm/frontswap.c @@ -127,7 +127,7 @@ void frontswap_register_ops(struct frontswap_ops *ops) spin_lock(&swap_lock); plist_for_each_entry(si, &swap_active_head, list) { if (!WARN_ON(!si->frontswap_map)) - set_bit(si->type, a); + __set_bit(si->type, a); } spin_unlock(&swap_lock); @@ -149,7 +149,7 @@ void frontswap_register_ops(struct frontswap_ops *ops) spin_lock(&swap_lock); plist_for_each_entry(si, &swap_active_head, list) { if (si->frontswap_map) - set_bit(si->type, b); + __set_bit(si->type, b); } spin_unlock(&swap_lock); |