The sysctl_extfrag_handler function neglects to propagate the return
value from proc_dointvec_minmax() to its caller. It's a wrapper that
doesn't need to exist, so just use proc_dointvec_minmax directly.
Reported-by: Aditya Pakki <pakki001@xxxxxxx>
Signed-off-by: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Acked-by: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>
---
include/linux/compaction.h | 2 --
kernel/sysctl.c | 2 +-
mm/compaction.c | 8 --------
3 files changed, 1 insertion(+), 11 deletions(-)
diff --git a/include/linux/compaction.h b/include/linux/compaction.h
index 68250a57aace..70d0256edd31 100644
--- a/include/linux/compaction.h
+++ b/include/linux/compaction.h
@@ -88,8 +88,6 @@ extern int sysctl_compact_memory;
extern int sysctl_compaction_handler(struct ctl_table *table, int write,
void __user *buffer, size_t *length, loff_t *ppos);
extern int sysctl_extfrag_threshold;
-extern int sysctl_extfrag_handler(struct ctl_table *table, int write,
- void __user *buffer, size_t *length, loff_t *ppos);
extern int sysctl_compact_unevictable_allowed;
extern int fragmentation_index(struct zone *zone, unsigned int order);
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 5fc724e4e454..e9c69247fc29 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -1439,7 +1439,7 @@ static struct ctl_table vm_table[] = {
.data = &sysctl_extfrag_threshold,
.maxlen = sizeof(int),
.mode = 0644,
- .proc_handler = sysctl_extfrag_handler,
+ .proc_handler = proc_dointvec_minmax,
.extra1 = &min_extfrag_threshold,
.extra2 = &max_extfrag_threshold,
},
diff --git a/mm/compaction.c b/mm/compaction.c
index 7c607479de4a..80b941d9b6e7 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -1876,14 +1876,6 @@ int sysctl_compaction_handler(struct ctl_table *table, int write,
return 0;
}
-int sysctl_extfrag_handler(struct ctl_table *table, int write,
- void __user *buffer, size_t *length, loff_t *ppos)
-{
- proc_dointvec_minmax(table, write, buffer, length, ppos);
-
- return 0;
-}
-
#if defined(CONFIG_SYSFS) && defined(CONFIG_NUMA)
static ssize_t sysfs_compact_node(struct device *dev,
struct device_attribute *attr,
--
2.20.1
