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mm/damon/sysfs: avoid call damon_target_has_pid() repeatedly 

In damon_sysfs_destroy_targets(), we call damon_target_has_pid() to check
whether the 'ctx' include a valid pid, but there no need to call
damon_target_has_pid() to check repeatedly, just need call it once.

[xhao@linux.alibaba.com: more simplified code calls damon_target_has_pid()]
  Link: https://lkml.kernel.org/r/20220916133535.7428-1-xhao@linux.alibaba.com
Link: https://lkml.kernel.org/r/20220915142237.92529-1-xhao@linux.alibaba.com
Signed-off-by: Xin Hao <xhao@linux.alibaba.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Xin Hao 2022-09-15 22:22:36 +08:00 committed by Andrew Morton
parent ce732a7520
commit 871f697b49
1 changed files with 2 additions and 1 deletions
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3
mm/damon/sysfs.c
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@ -2143,9 +2143,10 @@ static int damon_sysfs_set_attrs(struct damon_ctx *ctx,
static void damon_sysfs_destroy_targets(struct damon_ctx *ctx)
{
struct damon_target *t, *next;
bool has_pid = damon_target_has_pid(ctx);
damon_for_each_target_safe(t, next, ctx) {
if (damon_target_has_pid(ctx))
if (has_pid)
put_pid(t->pid);
damon_destroy_target(t);
}