[PATCH 08/11] mm/damon/sysfs: move unsigned long range directory to common module

SeongJae Park
2022-10-24T22:30:46Z

The implementation of unsigned long type range directories can be reused
by multiple DAMON sysfs directories including those for DAMON-based
Operation Schemes and the range of number of monitoring regions. Move
the code into the files for DAMON sysfs common logics.

Signed-off-by: SeongJae Park <sj@kernel.org>
---
mm/damon/sysfs-common.c | 96 ++++++++++++++++++++++++++++++++++++++
mm/damon/sysfs-common.h | 13 ++++++
mm/damon/sysfs.c | 100 ----------------------------------------
3 files changed, 109 insertions(+), 100 deletions(-)

diff --git a/mm/damon/sysfs-common.c b/mm/damon/sysfs-common.c
index 9dc743868d5b..52bebf242f74 100644
--- a/mm/damon/sysfs-common.c
+++ b/mm/damon/sysfs-common.c
@@ -5,7 +5,103 @@
* Author: SeongJae Park <sj@kernel.org>
*/

+#include <linux/slab.h>
+
#include "sysfs-common.h"

DEFINE_MUTEX(damon_sysfs_lock);

+/*
+ * unsigned long range directory
+ */
+
+struct damon_sysfs_ul_range *damon_sysfs_ul_range_alloc(
+ unsigned long min,
+ unsigned long max)
+{
+ struct damon_sysfs_ul_range *range = kmalloc(sizeof(*range),
+ GFP_KERNEL);
+
+ if (!range)
+ return NULL;
+ range->kobj = (struct kobject){};
+ range->min = min;
+ range->max = max;
+
+ return range;
+}
+
+static ssize_t min_show(struct kobject *kobj, struct kobj_attribute *attr,
+ char *buf)
+{
+ struct damon_sysfs_ul_range *range = container_of(kobj,
+ struct damon_sysfs_ul_range, kobj);
+
+ return sysfs_emit(buf, "%lu\n", range->min);
+}
+
+static ssize_t min_store(struct kobject *kobj, struct kobj_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct damon_sysfs_ul_range *range = container_of(kobj,
+ struct damon_sysfs_ul_range, kobj);
+ unsigned long min;
+ int err;
+
+ err = kstrtoul(buf, 0, &min);
+ if (err)
+ return err;
+
+ range->min = min;
+ return count;
+}
+
+static ssize_t max_show(struct kobject *kobj, struct kobj_attribute *attr,
+ char *buf)
+{
+ struct damon_sysfs_ul_range *range = container_of(kobj,
+ struct damon_sysfs_ul_range, kobj);
+
+ return sysfs_emit(buf, "%lu\n", range->max);
+}
+
+static ssize_t max_store(struct kobject *kobj, struct kobj_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct damon_sysfs_ul_range *range = container_of(kobj,
+ struct damon_sysfs_ul_range, kobj);
+ unsigned long max;
+ int err;
+
+ err = kstrtoul(buf, 0, &max);
+ if (err)
+ return err;
+
+ range->max = max;
+ return count;
+}
+
+void damon_sysfs_ul_range_release(struct kobject *kobj)
+{
+ kfree(container_of(kobj, struct damon_sysfs_ul_range, kobj));
+}
+
+static struct kobj_attribute damon_sysfs_ul_range_min_attr =
+ __ATTR_RW_MODE(min, 0600);
+
+static struct kobj_attribute damon_sysfs_ul_range_max_attr =
+ __ATTR_RW_MODE(max, 0600);
+
+static struct attribute *damon_sysfs_ul_range_attrs[] = {
+ &damon_sysfs_ul_range_min_attr.attr,
+ &damon_sysfs_ul_range_max_attr.attr,
+ NULL,
+};
+ATTRIBUTE_GROUPS(damon_sysfs_ul_range);
+
+struct kobj_type damon_sysfs_ul_range_ktype = {
+ .release = damon_sysfs_ul_range_release,
+ .sysfs_ops = &kobj_sysfs_ops,
+ .default_groups = damon_sysfs_ul_range_groups,
+};
+
diff --git a/mm/damon/sysfs-common.h b/mm/damon/sysfs-common.h
index 745a918b94f5..56e6a99e353b 100644
--- a/mm/damon/sysfs-common.h
+++ b/mm/damon/sysfs-common.h
@@ -9,3 +9,16 @@
#include <linux/kobject.h>

extern struct mutex damon_sysfs_lock;
+
+struct damon_sysfs_ul_range {
+ struct kobject kobj;
+ unsigned long min;
+ unsigned long max;
+};
+
+struct damon_sysfs_ul_range *damon_sysfs_ul_range_alloc(
+ unsigned long min,
+ unsigned long max);
+void damon_sysfs_ul_range_release(struct kobject *kobj);
+
+extern struct kobj_type damon_sysfs_ul_range_ktype;
diff --git a/mm/damon/sysfs.c b/mm/damon/sysfs.c
index 0f3f06d8dae7..129743292e17 100644
--- a/mm/damon/sysfs.c
+++ b/mm/damon/sysfs.c
@@ -11,106 +11,6 @@

#include "sysfs-common.h"

-/*
- * unsigned long range directory
- */
-
-struct damon_sysfs_ul_range {
- struct kobject kobj;
- unsigned long min;
- unsigned long max;
-};
-
-static struct damon_sysfs_ul_range *damon_sysfs_ul_range_alloc(
- unsigned long min,
- unsigned long max)
-{
- struct damon_sysfs_ul_range *range = kmalloc(sizeof(*range),
- GFP_KERNEL);
-
- if (!range)
- return NULL;
- range->kobj = (struct kobject){};
- range->min = min;
- range->max = max;
-
- return range;
-}
-
-static ssize_t min_show(struct kobject *kobj, struct kobj_attribute *attr,
- char *buf)
-{
- struct damon_sysfs_ul_range *range = container_of(kobj,
- struct damon_sysfs_ul_range, kobj);
-
- return sysfs_emit(buf, "%lu\n", range->min);
-}
-
-static ssize_t min_store(struct kobject *kobj, struct kobj_attribute *attr,
- const char *buf, size_t count)
-{
- struct damon_sysfs_ul_range *range = container_of(kobj,
- struct damon_sysfs_ul_range, kobj);
- unsigned long min;
- int err;
-
- err = kstrtoul(buf, 0, &min);
- if (err)
- return err;
-
- range->min = min;
- return count;
-}
-
-static ssize_t max_show(struct kobject *kobj, struct kobj_attribute *attr,
- char *buf)
-{
- struct damon_sysfs_ul_range *range = container_of(kobj,
- struct damon_sysfs_ul_range, kobj);
-
- return sysfs_emit(buf, "%lu\n", range->max);
-}
-
-static ssize_t max_store(struct kobject *kobj, struct kobj_attribute *attr,
- const char *buf, size_t count)
-{
- struct damon_sysfs_ul_range *range = container_of(kobj,
- struct damon_sysfs_ul_range, kobj);
- unsigned long max;
- int err;
-
- err = kstrtoul(buf, 0, &max);
- if (err)
- return err;
-
- range->max = max;
- return count;
-}
-
-static void damon_sysfs_ul_range_release(struct kobject *kobj)
-{
- kfree(container_of(kobj, struct damon_sysfs_ul_range, kobj));
-}
-
-static struct kobj_attribute damon_sysfs_ul_range_min_attr =
- __ATTR_RW_MODE(min, 0600);
-
-static struct kobj_attribute damon_sysfs_ul_range_max_attr =
- __ATTR_RW_MODE(max, 0600);
-
-static struct attribute *damon_sysfs_ul_range_attrs[] = {
- &damon_sysfs_ul_range_min_attr.attr,
- &damon_sysfs_ul_range_max_attr.attr,
- NULL,
-};
-ATTRIBUTE_GROUPS(damon_sysfs_ul_range);
-
-static struct kobj_type damon_sysfs_ul_range_ktype = {
- .release = damon_sysfs_ul_range_release,
- .sysfs_ops = &kobj_sysfs_ops,
- .default_groups = damon_sysfs_ul_range_groups,
-};
-
/*
* schemes/stats directory
*/
--
2.25.1