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mm: KSM: fix data type

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ksm_stable_node_chains_prune_millisecs is declared as int, but in
stable__node_chains_prune_millisecs_store(), it can store values up to
UINT_MAX.  Change its type to unsigned int.

Link: https://lkml.kernel.org/r/20210806111351.GA71845@asus
Signed-off-by: Zhansaya Bagdauletkyzy <zhansayabagdaulet@gmail.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Zhansaya Bagdauletkyzy 2021-09-02 15:00:51 -07:00 committed by Linus Torvalds
parent 82e717ad35
commit 584ff0dfb0
1 changed files with 4 additions and 4 deletions

8
mm/ksm.c

@ -259,7 +259,7 @@ static unsigned long ksm_stable_node_chains;
static unsigned long ksm_stable_node_dups; static unsigned long ksm_stable_node_dups;
/* Delay in pruning stale stable_node_dups in the stable_node_chains */ /* Delay in pruning stale stable_node_dups in the stable_node_chains */
static int ksm_stable_node_chains_prune_millisecs = 2000; static unsigned int ksm_stable_node_chains_prune_millisecs = 2000;
/* Maximum number of page slots sharing a stable node */ /* Maximum number of page slots sharing a stable node */
static int ksm_max_page_sharing = 256; static int ksm_max_page_sharing = 256;
@ -3105,11 +3105,11 @@ stable_node_chains_prune_millisecs_store(struct kobject *kobj,
struct kobj_attribute *attr, struct kobj_attribute *attr,
const char *buf, size_t count) const char *buf, size_t count)
{ {
unsigned long msecs; unsigned int msecs;
int err; int err;
err = kstrtoul(buf, 10, &msecs); err = kstrtouint(buf, 10, &msecs);
if (err || msecs > UINT_MAX) if (err)
return -EINVAL; return -EINVAL;
ksm_stable_node_chains_prune_millisecs = msecs; ksm_stable_node_chains_prune_millisecs = msecs;