linux-kernel - [PATCH] mm/damon: use 'struct damon_target *' instead of 'void *' in target

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Message-Id: <1663241621-13293-1-git-send-email-kaixuxia@tencent.com>
Date:   Thu, 15 Sep 2022 19:33:41 +0800
From:   xiakaixu1987@...il.com
To:     sj@...nel.org, akpm@...ux-foundation.org
Cc:     damon@...ts.linux.dev, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, Kaixu Xia <kaixuxia@...cent.com>
Subject: [PATCH] mm/damon: use 'struct damon_target *' instead of 'void *' in target_valid()

From: Kaixu Xia <kaixuxia@...cent.com>

We could use 'struct damon_target *' directly instead of 'void *' in
target_valid() operation to make code simple.

Signed-off-by: Kaixu Xia <kaixuxia@...cent.com>
---
 include/linux/damon.h | 2 +-
 mm/damon/vaddr.c      | 3 +--
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/include/linux/damon.h b/include/linux/damon.h
index c5dc0c77c772..1dda8d0068e5 100644
--- a/include/linux/damon.h
+++ b/include/linux/damon.h
@@ -346,7 +346,7 @@ struct damon_operations {
 	unsigned long (*apply_scheme)(struct damon_ctx *context,
 			struct damon_target *t, struct damon_region *r,
 			struct damos *scheme);
-	bool (*target_valid)(void *target);
+	bool (*target_valid)(struct damon_target *t);
 	void (*cleanup)(struct damon_ctx *context);
 };
 
diff --git a/mm/damon/vaddr.c b/mm/damon/vaddr.c
index 3f84584f9982..f53c2ff2bcc8 100644
--- a/mm/damon/vaddr.c
+++ b/mm/damon/vaddr.c
@@ -593,9 +593,8 @@ static unsigned int damon_va_check_accesses(struct damon_ctx *ctx)
  * Functions for the target validity check and cleanup
  */
 
-static bool damon_va_target_valid(void *target)
+static bool damon_va_target_valid(struct damon_target *t)
 {
-	struct damon_target *t = target;
 	struct task_struct *task;
 
 	task = damon_get_task_struct(t);
-- 
2.27.0