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UPSTREAM: mm/damon/sysfs: move sysfs_lock to common module

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DAMON sysfs interface is implemented in a single file, sysfs.c, which has
about 2,800 lines of code.  As the interface is hierarchical and some of
the code can be reused by different hierarchies, it would make more sense
to split out the implementation into common parts and different parts in
multiple files.  As the beginning of the work, create files for common
code and move the global mutex for directories modifications protection
into the new file.

Link: https://lkml.kernel.org/r/20221026225943.100429-8-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

(cherry picked from commit 39240595917ec0c4f71d7b9dd7909790715968b5)

Bug: 300502883
Change-Id: I8e0eb32f2b90a907d917f684c35f2a321d944c0e
Signed-off-by: cui yangpei <cuiyangpei@xiaomi.com>
This commit is contained in:
SeongJae Park 2022-10-26 22:59:38 +00:00 committed by Suren Baghdasaryan
parent b7fc8d59a5
commit c5038d80ce
4 changed files with 24 additions and 4 deletions
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2
mm/damon/Makefile
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@ -3,7 +3,7 @@
obj-y := core.o
obj-$(CONFIG_DAMON_VADDR) += ops-common.o vaddr.o
obj-$(CONFIG_DAMON_PADDR) += ops-common.o paddr.o
obj-$(CONFIG_DAMON_SYSFS) += sysfs.o
obj-$(CONFIG_DAMON_SYSFS) += sysfs-common.o sysfs.o
obj-$(CONFIG_DAMON_DBGFS) += dbgfs.o
obj-$(CONFIG_DAMON_RECLAIM) += reclaim.o
obj-$(CONFIG_DAMON_LRU_SORT) += lru_sort.o

11
mm/damon/sysfs-common.c Normal file
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@ -0,0 +1,11 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Common Primitives for DAMON Sysfs Interface
*
* Author: SeongJae Park <sj@kernel.org>
*/
#include "sysfs-common.h"
DEFINE_MUTEX(damon_sysfs_lock);

11
mm/damon/sysfs-common.h Normal file
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@ -0,0 +1,11 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Common Primitives for DAMON Sysfs Interface
*
* Author: SeongJae Park <sj@kernel.org>
*/
#include <linux/damon.h>
#include <linux/kobject.h>
extern struct mutex damon_sysfs_lock;

4
mm/damon/sysfs.c
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@ -5,13 +5,11 @@
* Copyright (c) 2022 SeongJae Park <sj@kernel.org>
*/
#include <linux/damon.h>
#include <linux/kobject.h>
#include <linux/pid.h>
#include <linux/sched.h>
#include <linux/slab.h>
static DEFINE_MUTEX(damon_sysfs_lock);
#include "sysfs-common.h"
/*
* unsigned long range directory