linux-kernel - [RFC PATCH 01/16] mm/madvise: use is_memory_failure() from madvise_do

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Message-Id: <20250305181611.54484-2-sj@kernel.org>
Date: Wed,  5 Mar 2025 10:15:56 -0800
From: SeongJae Park <sj@...nel.org>
To: 
Cc: SeongJae Park <sj@...nel.org>,
	"Liam R. Howlett" <howlett@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Hildenbrand <david@...hat.com>,
	Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,
	Shakeel Butt <shakeel.butt@...ux.dev>,
	Vlastimil Babka <vbabka@...e.cz>,
	kernel-team@...a.com,
	linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: [RFC PATCH 01/16] mm/madvise: use is_memory_failure() from madvise_do_behavior()

To reduce redundant open-coded checks of CONFIG_MEMORY_FAILURE and
MADV_{HWPOISON,SOFT_OFFLINE} in madvise_[un]lock(), is_memory_failure()
has introduced.  madvise_do_behavior() is still doing the same
open-coded check, though.  Use is_memory_failure() instead.

Signed-off-by: SeongJae Park <sj@...nel.org>
---
 mm/madvise.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/mm/madvise.c b/mm/madvise.c
index 388dc289b5d1..dbc8fec05cc6 100644
--- a/mm/madvise.c
+++ b/mm/madvise.c
@@ -1640,10 +1640,8 @@ static int madvise_do_behavior(struct mm_struct *mm,
 	unsigned long end;
 	int error;
 
-#ifdef CONFIG_MEMORY_FAILURE
-	if (behavior == MADV_HWPOISON || behavior == MADV_SOFT_OFFLINE)
+	if (is_memory_failure(behavior))
 		return madvise_inject_error(behavior, start, start + len_in);
-#endif
 	start = untagged_addr_remote(mm, start);
 	end = start + len;
 
-- 
2.39.5