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Date: Sun, 5 Dec 2010 19:49:03 +0200
From: Alexey Dobriyan <adobriyan@...il.com>
To: akpm@...ux-foundation.org
Cc: linux-kernel@...r.kernel.org, Alexey Dobriyan <adobriyan@...il.com>
Subject: [PATCH 06/45] kstrtox: convert mm/
In mm/vmscan.c:
make "scan_unevictable_pages" write-only.
Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>
---
include/linux/slub_def.h | 2 +-
mm/hugetlb.c | 12 ++++++------
mm/kmemleak.c | 4 ++--
mm/ksm.c | 28 ++++++++++------------------
mm/slub.c | 19 ++++++++++---------
mm/vmscan.c | 25 ++++++++++---------------
6 files changed, 39 insertions(+), 51 deletions(-)
diff --git a/include/linux/slub_def.h b/include/linux/slub_def.h
index e4f5ed1..37f439d 100644
--- a/include/linux/slub_def.h
+++ b/include/linux/slub_def.h
@@ -95,7 +95,7 @@ struct kmem_cache {
/*
* Defragmentation by allocating from a remote node.
*/
- int remote_node_defrag_ratio;
+ unsigned int remote_node_defrag_ratio;
#endif
struct kmem_cache_node *node[MAX_NUMNODES];
};
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 8585524..a9a5460 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -1438,9 +1438,9 @@ static ssize_t nr_hugepages_store_common(bool obey_mempolicy,
struct hstate *h;
NODEMASK_ALLOC(nodemask_t, nodes_allowed, GFP_KERNEL | __GFP_NORETRY);
- err = strict_strtoul(buf, 10, &count);
- if (err)
- return 0;
+ err = kstrtoul(buf, 10, &count);
+ if (err < 0)
+ return err;
h = kobj_to_hstate(kobj, &nid);
if (nid == NUMA_NO_NODE) {
@@ -1517,9 +1517,9 @@ static ssize_t nr_overcommit_hugepages_store(struct kobject *kobj,
unsigned long input;
struct hstate *h = kobj_to_hstate(kobj, NULL);
- err = strict_strtoul(buf, 10, &input);
- if (err)
- return 0;
+ err = kstrtoul(buf, 10, &input);
+ if (err < 0)
+ return err;
spin_lock(&hugetlb_lock);
h->nr_overcommit_huge_pages = input;
diff --git a/mm/kmemleak.c b/mm/kmemleak.c
index bd9bc21..b3fb3f5 100644
--- a/mm/kmemleak.c
+++ b/mm/kmemleak.c
@@ -1557,9 +1557,9 @@ static ssize_t kmemleak_write(struct file *file, const char __user *user_buf,
else if (strncmp(buf, "scan=off", 8) == 0)
stop_scan_thread();
else if (strncmp(buf, "scan=", 5) == 0) {
- unsigned long secs;
+ unsigned int secs;
- ret = strict_strtoul(buf + 5, 0, &secs);
+ ret = kstrtouint(buf + 5, 0, &secs);
if (ret < 0)
goto out;
stop_scan_thread();
diff --git a/mm/ksm.c b/mm/ksm.c
index 43bc893..c03345b 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -1773,15 +1773,11 @@ static ssize_t sleep_millisecs_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t count)
{
- unsigned long msecs;
int err;
- err = strict_strtoul(buf, 10, &msecs);
- if (err || msecs > UINT_MAX)
- return -EINVAL;
-
- ksm_thread_sleep_millisecs = msecs;
-
+ err = kstrtouint(buf, 10, &ksm_thread_sleep_millisecs);
+ if (err < 0)
+ return err;
return count;
}
KSM_ATTR(sleep_millisecs);
@@ -1797,14 +1793,10 @@ static ssize_t pages_to_scan_store(struct kobject *kobj,
const char *buf, size_t count)
{
int err;
- unsigned long nr_pages;
-
- err = strict_strtoul(buf, 10, &nr_pages);
- if (err || nr_pages > UINT_MAX)
- return -EINVAL;
-
- ksm_thread_pages_to_scan = nr_pages;
+ err = kstrtouint(buf, 10, &ksm_thread_pages_to_scan);
+ if (err < 0)
+ return err;
return count;
}
KSM_ATTR(pages_to_scan);
@@ -1819,11 +1811,11 @@ static ssize_t run_store(struct kobject *kobj, struct kobj_attribute *attr,
const char *buf, size_t count)
{
int err;
- unsigned long flags;
+ unsigned int flags;
- err = strict_strtoul(buf, 10, &flags);
- if (err || flags > UINT_MAX)
- return -EINVAL;
+ err = kstrtouint(buf, 10, &flags);
+ if (err < 0)
+ return err;
if (flags > KSM_RUN_UNMERGE)
return -EINVAL;
diff --git a/mm/slub.c b/mm/slub.c
index 981fb73..3170e52 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -3928,11 +3928,11 @@ SLAB_ATTR_RO(objs_per_slab);
static ssize_t order_store(struct kmem_cache *s,
const char *buf, size_t length)
{
- unsigned long order;
+ int order;
int err;
- err = strict_strtoul(buf, 10, &order);
- if (err)
+ err = kstrtoint(buf, 10, &order);
+ if (err < 0)
return err;
if (order > slub_max_order || order < slub_min_order)
@@ -3959,7 +3959,7 @@ static ssize_t min_partial_store(struct kmem_cache *s, const char *buf,
unsigned long min;
int err;
- err = strict_strtoul(buf, 10, &min);
+ err = kstrtoul(buf, 10, &min);
if (err)
return err;
@@ -4219,21 +4219,22 @@ SLAB_ATTR(shrink);
#ifdef CONFIG_NUMA
static ssize_t remote_node_defrag_ratio_show(struct kmem_cache *s, char *buf)
{
- return sprintf(buf, "%d\n", s->remote_node_defrag_ratio / 10);
+ return sprintf(buf, "%u\n", s->remote_node_defrag_ratio / 10);
}
static ssize_t remote_node_defrag_ratio_store(struct kmem_cache *s,
const char *buf, size_t length)
{
- unsigned long ratio;
+ unsigned int ratio;
int err;
- err = strict_strtoul(buf, 10, &ratio);
+ err = kstrtouint(buf, 10, &ratio);
if (err)
return err;
+ if (ratio > 100)
+ return -EINVAL;
- if (ratio <= 100)
- s->remote_node_defrag_ratio = ratio * 10;
+ s->remote_node_defrag_ratio = ratio * 10;
return length;
}
diff --git a/mm/vmscan.c b/mm/vmscan.c
index d31d7ce..61acce3 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -3055,37 +3055,32 @@ int scan_unevictable_handler(struct ctl_table *table, int write,
* per node 'scan_unevictable_pages' attribute. On demand re-scan of
* a specified node's per zone unevictable lists for evictable pages.
*/
-
-static ssize_t read_scan_unevictable_node(struct sys_device *dev,
- struct sysdev_attribute *attr,
- char *buf)
-{
- return sprintf(buf, "0\n"); /* always zero; should fit... */
-}
-
static ssize_t write_scan_unevictable_node(struct sys_device *dev,
struct sysdev_attribute *attr,
const char *buf, size_t count)
{
struct zone *node_zones = NODE_DATA(dev->id)->node_zones;
struct zone *zone;
- unsigned long res;
- unsigned long req = strict_strtoul(buf, 10, &res);
+ unsigned long val;
+ int rv;
- if (!req)
- return 1; /* zero is no-op */
+ rv = kstrtoul(buf, 10, &val);
+ if (rv < 0)
+ return rv;
+ if (val == 0)
+ return count;
for (zone = node_zones; zone - node_zones < MAX_NR_ZONES; ++zone) {
if (!populated_zone(zone))
continue;
scan_zone_unevictable_pages(zone);
}
- return 1;
+ return count;
}
-static SYSDEV_ATTR(scan_unevictable_pages, S_IRUGO | S_IWUSR,
- read_scan_unevictable_node,
+static SYSDEV_ATTR(scan_unevictable_pages, S_IWUSR,
+ NULL,
write_scan_unevictable_node);
int scan_unevictable_register_node(struct node *node)
--
1.7.2.2
--
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