f2fs: fix to update last_disk_size correctly

[linux.git] / fs / mbcache.c

diff --git a/fs/mbcache.c b/fs/mbcache.c
index d818fd23678700bf8435af2fa64ed62dfdba4d2c..b8b8b9ced9f81c47a1f76da3ef61c2f9d4645c78 100644 (file)
--- a/fs/mbcache.c
+++ b/fs/mbcache.c
@@ -269,6 +269,9 @@ static unsigned long mb_cache_count(struct shrinker *shrink,
        struct mb_cache *cache = container_of(shrink, struct mb_cache,
                                              c_shrink);
 
+       /* Unlikely, but not impossible */
+       if (unlikely(cache->c_entry_count < 0))
+               return 0;
        return cache->c_entry_count;
 }