From: Nicholas Swenson Date: Fri, 1 Nov 2013 02:25:18 +0000 (-0700) Subject: bcache: fix for gc crashing when no sectors are used X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=bee63f40cb5f5e8ab2abfbc85acde99cc0acd4b5;p=linux-beck.git bcache: fix for gc crashing when no sectors are used Signed-off-by: Nicholas Swenson Signed-off-by: Kent Overstreet --- diff --git a/drivers/md/bcache/movinggc.c b/drivers/md/bcache/movinggc.c index 7c1275e66025..46c952379fab 100644 --- a/drivers/md/bcache/movinggc.c +++ b/drivers/md/bcache/movinggc.c @@ -184,7 +184,8 @@ static bool bucket_cmp(struct bucket *l, struct bucket *r) static unsigned bucket_heap_top(struct cache *ca) { - return GC_SECTORS_USED(heap_peek(&ca->heap)); + struct bucket *b; + return (b = heap_peek(&ca->heap)) ? GC_SECTORS_USED(b) : 0; } void bch_moving_gc(struct cache_set *c)