From 584ff0dfb09a81e1addf02543f7c1fa8e71ce6d2 Mon Sep 17 00:00:00 2001
From: Zhansaya Bagdauletkyzy <zhansayabagdaulet@gmail.com>
Date: Thu, 2 Sep 2021 15:00:51 -0700
Subject: [PATCH] mm: KSM: fix data type
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>
---
mm/ksm.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/mm/ksm.c b/mm/ksm.c
index 3fa9bc8a67cf6..025338128cd92 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -259,7 +259,7 @@ static unsigned long ksm_stable_node_chains;
static unsigned long ksm_stable_node_dups;
/* 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 */
static int ksm_max_page_sharing = 256;
@@ -3105,11 +3105,11 @@ stable_node_chains_prune_millisecs_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t count)
{
- unsigned long msecs;
+ unsigned int msecs;
int err;
- err = kstrtoul(buf, 10, &msecs);
- if (err || msecs > UINT_MAX)
+ err = kstrtouint(buf, 10, &msecs);
+ if (err)
return -EINVAL;
ksm_stable_node_chains_prune_millisecs = msecs;
--
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