The patch titled
Subject: mm/damon/sysfs: simplify the variable 'pid' assignment operation
has been added to the -mm mm-unstable branch. Its filename is
mm-damon-sysfs-simplify-the-variable-pid-assignment-operation.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-damon-sysfs-simplify-the-variable-pid-assignment-operation.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Kaixu Xia <kaixuxia@xxxxxxxxxxx>
Subject: mm/damon/sysfs: simplify the variable 'pid' assignment operation
Date: Tue, 13 Sep 2022 17:11:25 +0800
We can initialize the variable 'pid' with '-1' in pid_show() to simplify
the variable assignment operation and make the code more readable.
Link: https://lkml.kernel.org/r/1663060287-30201-3-git-send-email-kaixuxia@xxxxxxxxxxx
Signed-off-by: Kaixu Xia <kaixuxia@xxxxxxxxxxx>
Reviewed-by: SeongJae Park <sj@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/damon/sysfs.c | 11 ++++-------
1 file changed, 4 insertions(+), 7 deletions(-)
--- a/mm/damon/sysfs.c~mm-damon-sysfs-simplify-the-variable-pid-assignment-operation
+++ a/mm/damon/sysfs.c
@@ -2592,19 +2592,16 @@ static ssize_t pid_show(struct kobject *
struct damon_sysfs_kdamond *kdamond = container_of(kobj,
struct damon_sysfs_kdamond, kobj);
struct damon_ctx *ctx;
- int pid;
+ int pid = -1;
if (!mutex_trylock(&damon_sysfs_lock))
return -EBUSY;
ctx = kdamond->damon_ctx;
- if (!ctx) {
- pid = -1;
+ if (!ctx)
goto out;
- }
+
mutex_lock(&ctx->kdamond_lock);
- if (!ctx->kdamond)
- pid = -1;
- else
+ if (ctx->kdamond)
pid = ctx->kdamond->pid;
mutex_unlock(&ctx->kdamond_lock);
out:
_
Patches currently in -mm which might be from kaixuxia@xxxxxxxxxxx are
mm-damon-sysfs-simplify-the-judgement-whether-kdamonds-are-busy.patch
mm-damon-core-iterate-the-regions-list-from-current-point-in-damon_set_regions.patch
mm-damon-vaddr-add-a-comment-for-default-case-in-damon_va_apply_scheme.patch
mm-damon-sysfs-use-the-wrapper-directly-to-check-if-the-kdamond-is-running.patch
mm-damon-simplify-the-parameter-passing-for-prepare_access_checks.patch
mm-damon-sysfs-simplify-the-variable-pid-assignment-operation.patch
mm-damon-core-simplify-the-kdamond-stop-mechanism-by-removing-done.patch
mm-damon-vaddr-indicate-the-target-is-invalid-when-nr_regions-is-zero.patch
