bcache: RESERVE_PRIO is too small by one when prio_buckets() is a power of two.

[firefly-linux-kernel-4.4.55.git] / drivers / md / bcache / super.c

diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index a296425a7270df87e1fc9cdd403668dd5bb82deb..3d5c0ba131818c8b7238c7d57f1c1f8eb252c064 100644 (file)
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -1818,7 +1818,7 @@ static int cache_alloc(struct cache_sb *sb, struct cache *ca)
        free = roundup_pow_of_two(ca->sb.nbuckets) >> 10;
 
        if (!init_fifo(&ca->free[RESERVE_BTREE], 8, GFP_KERNEL) ||
-           !init_fifo(&ca->free[RESERVE_PRIO], prio_buckets(ca), GFP_KERNEL) ||
+           !init_fifo_exact(&ca->free[RESERVE_PRIO], prio_buckets(ca), GFP_KERNEL) ||
            !init_fifo(&ca->free[RESERVE_MOVINGGC], free, GFP_KERNEL) ||
            !init_fifo(&ca->free[RESERVE_NONE], free, GFP_KERNEL) ||
            !init_fifo(&ca->free_inc,   free << 2, GFP_KERNEL) ||