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mm: multi-gen LRU: clean up sysfs code 

This patch cleans up the sysfs code. Specifically,
  1. use sysfs_emit(),
  2. use __ATTR_RW(), and
  3. constify multi-gen LRU struct attribute_group.

Link: https://lkml.kernel.org/r/20230214035445.1250139-1-talumbau@google.com
Signed-off-by: T.J. Alumbaugh <talumbau@google.com>
Cc: Yu Zhao <yuzhao@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
T.J. Alumbaugh 2023-02-14 03:54:44 +00:00 committed by Andrew Morton
parent d155df53f3
commit 9a52b2f32a
2 changed files with 10 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/linux/mmzone.h
View File

@ -1369,7 +1369,7 @@ typedef struct pglist_data {
#ifdef CONFIG_LRU_GEN
/* kswap mm walk data */
struct lru_gen_mm_walk mm_walk;
struct lru_gen_mm_walk mm_walk;
/* lru_gen_folio list */
struct lru_gen_memcg memcg_lru;
#endif

22
mm/vmscan.c
View File

@ -5663,14 +5663,14 @@ unlock:
* sysfs interface
******************************************************************************/
static ssize_t show_min_ttl(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
static ssize_t min_ttl_ms_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
{
return sprintf(buf, "%u\n", jiffies_to_msecs(READ_ONCE(lru_gen_min_ttl)));
return sysfs_emit(buf, "%u\n", jiffies_to_msecs(READ_ONCE(lru_gen_min_ttl)));
}
/* see Documentation/admin-guide/mm/multigen_lru.rst for details */
static ssize_t store_min_ttl(struct kobject *kobj, struct kobj_attribute *attr,
const char *buf, size_t len)
static ssize_t min_ttl_ms_store(struct kobject *kobj, struct kobj_attribute *attr,
const char *buf, size_t len)
{
unsigned int msecs;
@ -5682,11 +5682,9 @@ static ssize_t store_min_ttl(struct kobject *kobj, struct kobj_attribute *attr,
return len;
}
static struct kobj_attribute lru_gen_min_ttl_attr = __ATTR(
min_ttl_ms, 0644, show_min_ttl, store_min_ttl
);
static struct kobj_attribute lru_gen_min_ttl_attr = __ATTR_RW(min_ttl_ms);
static ssize_t show_enabled(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
static ssize_t enabled_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
{
unsigned int caps = 0;
@ -5703,7 +5701,7 @@ static ssize_t show_enabled(struct kobject *kobj, struct kobj_attribute *attr, c
}
/* see Documentation/admin-guide/mm/multigen_lru.rst for details */
static ssize_t store_enabled(struct kobject *kobj, struct kobj_attribute *attr,
static ssize_t enabled_store(struct kobject *kobj, struct kobj_attribute *attr,
const char *buf, size_t len)
{
int i;
@ -5730,9 +5728,7 @@ static ssize_t store_enabled(struct kobject *kobj, struct kobj_attribute *attr,
return len;
}
static struct kobj_attribute lru_gen_enabled_attr = __ATTR(
enabled, 0644, show_enabled, store_enabled
);
static struct kobj_attribute lru_gen_enabled_attr = __ATTR_RW(enabled);
static struct attribute *lru_gen_attrs[] = {
&lru_gen_min_ttl_attr.attr,
@ -5740,7 +5736,7 @@ static struct attribute *lru_gen_attrs[] = {
NULL
};
static struct attribute_group lru_gen_attr_group = {
static const struct attribute_group lru_gen_attr_group = {
.name = "lru_gen",
.attrs = lru_gen_attrs,
};