Commit 43be594a authored by Zhang Yanfei's avatar Zhang Yanfei Committed by Linus Torvalds

fs/buffer.c: change type of max_buffer_heads to unsigned long

max_buffer_heads is calculated from nr_free_buffer_pages(), so change
its type to unsigned long in case of overflow.
Signed-off-by: default avatarZhang Yanfei <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent 6434b94a
......@@ -3227,7 +3227,7 @@ static struct kmem_cache *bh_cachep __read_mostly;
* Once the number of bh's in the machine exceeds this level, we start
* stripping them in writeback.
static int max_buffer_heads;
static unsigned long max_buffer_heads;
int buffer_heads_over_limit;
......@@ -3343,7 +3343,7 @@ EXPORT_SYMBOL(bh_submit_read);
void __init buffer_init(void)
int nrpages;
unsigned long nrpages;
bh_cachep = kmem_cache_create("buffer_head",
sizeof(struct buffer_head), 0,
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