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@xxxxxxxxxxxxxx>
---
fs/buffer.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/buffer.c b/fs/buffer.c
index 7a75c3e..3eb675b 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -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,
--
1.7.1
--
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