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bcache: fix for gc crashing when no sectors are used 

Signed-off-by: Nicholas Swenson <nks@daterainc.com>
Signed-off-by: Kent Overstreet <kmo@daterainc.com>
This commit is contained in:
Nicholas Swenson 2013-10-31 19:25:18 -07:00 committed by Kent Overstreet
parent 97d11a660f
commit bee63f40cb
1 changed files with 2 additions and 1 deletions
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3
drivers/md/bcache/movinggc.c
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@ -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)