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

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max_buffer_heads is calculated from nr_free_buffer_pages(), so change
its type to unsigned long in case of overflow.

Signed-off-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Zhang Yanfei 2013-02-22 16:35:46 -08:00 • committed by Linus Torvalds
parent 6434b94a16
commit 43be594a6b
1 changed files with 2 additions and 2 deletions
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4
fs/buffer.c
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@ -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 * Once the number of bh's in the machine exceeds this level, we start
* stripping them in writeback. * stripping them in writeback.
*/ */
static int max_buffer_heads; static unsigned long max_buffer_heads;
int buffer_heads_over_limit; int buffer_heads_over_limit;
@ -3343,7 +3343,7 @@ EXPORT_SYMBOL(bh_submit_read);
void __init buffer_init(void) void __init buffer_init(void)
{ {
int nrpages; unsigned long nrpages;
bh_cachep = kmem_cache_create("buffer_head", bh_cachep = kmem_cache_create("buffer_head",
sizeof(struct buffer_head), 0, sizeof(struct buffer_head), 0,