diff options
Diffstat (limited to 'lib/sbitmap.c')
| -rw-r--r-- | lib/sbitmap.c | 14 |
1 files changed, 3 insertions, 11 deletions
diff --git a/lib/sbitmap.c b/lib/sbitmap.c index c1c8a4e69325..4fd877048ba8 100644 --- a/lib/sbitmap.c +++ b/lib/sbitmap.c @@ -15,13 +15,9 @@ static inline bool sbitmap_deferred_clear(struct sbitmap_word *map) { unsigned long mask, val; - bool ret = false; - unsigned long flags; - spin_lock_irqsave(&map->swap_lock, flags); - - if (!map->cleared) - goto out_unlock; + if (!READ_ONCE(map->cleared)) + return false; /* * First get a stable cleared mask, setting the old mask to 0. @@ -35,10 +31,7 @@ static inline bool sbitmap_deferred_clear(struct sbitmap_word *map) val = map->word; } while (cmpxchg(&map->word, val, val & ~mask) != val); - ret = true; -out_unlock: - spin_unlock_irqrestore(&map->swap_lock, flags); - return ret; + return true; } int sbitmap_init_node(struct sbitmap *sb, unsigned int depth, int shift, @@ -80,7 +73,6 @@ int sbitmap_init_node(struct sbitmap *sb, unsigned int depth, int shift, for (i = 0; i < sb->map_nr; i++) { sb->map[i].depth = min(depth, bits_per_word); depth -= sb->map[i].depth; - spin_lock_init(&sb->map[i].swap_lock); } return 0; } |