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mm/damon/sysfs: simplify the variable 'pid' assignment operation

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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@tencent.com
Signed-off-by: Kaixu Xia <kaixuxia@tencent.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Kaixu Xia 2022-09-13 17:11:25 +08:00 committed by Andrew Morton
parent 8ef4d5caa6
commit f1c71c2825
1 changed files with 4 additions and 7 deletions
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11
mm/damon/sysfs.c
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@ -2592,19 +2592,16 @@ static ssize_t pid_show(struct kobject *kobj,
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: