linux-kernel - [PATCH V2] mm/damon: simplify damon_ctx check in damon_sysfs_before

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Date:   Thu,  8 Sep 2022 10:19:12 +0800
From:   Xin Hao <xhao@...ux.alibaba.com>
To:     sj@...nel.org
Cc:     akpm@...ux-foundation.org, damon@...ts.linux.dev,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        xhao@...ux.alibaba.com
Subject: [PATCH V2] mm/damon: simplify damon_ctx check in damon_sysfs_before_terminate

In damon_sysfs_before_terminate() func, it need to check whether
ctx->ops.id supports 'DAMON_OPS_VADDR' or 'DAMON_OPS_FVADDR', there we
can use damon_target_has_pid() instead.

Signed-off-by: Xin Hao <xhao@...ux.alibaba.com>
Reviewed-by: SeongJae Park <sj@...nel.org>
---
 mm/damon/sysfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/damon/sysfs.c b/mm/damon/sysfs.c
index 7488e27c87c3..88f208ff235d 100644
--- a/mm/damon/sysfs.c
+++ b/mm/damon/sysfs.c
@@ -2309,7 +2309,7 @@ static void damon_sysfs_before_terminate(struct damon_ctx *ctx)
 {
 	struct damon_target *t, *next;

-	if (ctx->ops.id != DAMON_OPS_VADDR && ctx->ops.id != DAMON_OPS_FVADDR)
+	if (!damon_target_has_pid(ctx))
 		return;

 	mutex_lock(&ctx->kdamond_lock);
--
2.31.0