[merged mm-stable] mm-damon-sysfs-avoid-call-damon_target_has_pid-repeatedly.patch removed from -mm tree

[merged mm-stable] mm-damon-sysfs-avoid-call-damon_target_has_pid-repeatedly.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm/damon/sysfs: avoid call damon_target_has_pid() repeatedly
has been removed from the -mm tree.  Its filename was
     mm-damon-sysfs-avoid-call-damon_target_has_pid-repeatedly.patch

This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: Xin Hao <xhao@linux.alibaba.com>
Subject: mm/damon/sysfs: avoid call damon_target_has_pid() repeatedly
Date: Thu, 15 Sep 2022 22:22:36 +0800

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>
---

 mm/damon/sysfs.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/mm/damon/sysfs.c~mm-damon-sysfs-avoid-call-damon_target_has_pid-repeatedly
+++ a/mm/damon/sysfs.c
@@ -2143,9 +2143,10 @@ static int damon_sysfs_set_attrs(struct
 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);
 	}
_

Patches currently in -mm which might be from xhao@linux.alibaba.com are

mm-damon-move-sz_damon_region-to-damon_sz_region.patch
mm-damon-use-damon_sz_region-in-appropriate-place.patch