diff options
| -rw-r--r-- | drivers/block/zram/zram_drv.c | 13 |
1 files changed, 5 insertions, 8 deletions
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c index 966aab902d19..87711ddf4b54 100644 --- a/drivers/block/zram/zram_drv.c +++ b/drivers/block/zram/zram_drv.c @@ -188,16 +188,13 @@ static void update_position(u32 *index, int *offset, struct bio_vec *bvec) static inline void update_used_max(struct zram *zram, const unsigned long pages) { - unsigned long old_max, cur_max; - - old_max = atomic_long_read(&zram->stats.max_used_pages); + unsigned long cur_max = atomic_long_read(&zram->stats.max_used_pages); do { - cur_max = old_max; - if (pages > cur_max) - old_max = atomic_long_cmpxchg( - &zram->stats.max_used_pages, cur_max, pages); - } while (old_max != cur_max); + if (cur_max >= pages) + return; + } while (!atomic_long_try_cmpxchg(&zram->stats.max_used_pages, + &cur_max, pages)); } static inline void zram_fill_page(void *ptr, unsigned long len, |