+ mm-memory-failurec-cleanup-in-unpoison_memory.patch added to mm-unstable branch

+ mm-memory-failurec-cleanup-in-unpoison_memory.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm/memory-failure.c: cleanup in unpoison_memory
has been added to the -mm mm-unstable branch.  Its filename is
     mm-memory-failurec-cleanup-in-unpoison_memory.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-memory-failurec-cleanup-in-unpoison_memory.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Ma Wupeng <mawupeng1@huawei.com>
Subject: mm/memory-failure.c: cleanup in unpoison_memory
Date: Fri, 25 Nov 2022 14:54:44 +0800

If freeit it true, the value of ret must be zero, there is no need to
check the value of freeit after label unlock_mutex.

We can drop variable freeit to do this cleanup.

Link: https://lkml.kernel.org/r/20221125065444.3462681-1-mawupeng1@huawei.com
Signed-off-by: Ma Wupeng <mawupeng1@huawei.com>
Acked-by: Naoya Horiguchi <naoya.horiguchi@nec.com>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: zhenwei pi <pizhenwei@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/memory-failure.c |    6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

--- a/mm/memory-failure.c~mm-memory-failurec-cleanup-in-unpoison_memory
+++ a/mm/memory-failure.c
@@ -2338,7 +2338,6 @@ int unpoison_memory(unsigned long pfn)
 	struct page *page;
 	struct page *p;
 	int ret = -EBUSY;
-	int freeit = 0;
 	unsigned long count = 1;
 	bool huge = false;
 	static DEFINE_RATELIMIT_STATE(unpoison_rs, DEFAULT_RATELIMIT_INTERVAL,
@@ -2413,10 +2412,9 @@ int unpoison_memory(unsigned long pfn)
 				goto unlock_mutex;
 			}
 		}
-		freeit = !!TestClearPageHWPoison(p);
 
 		put_page(page);
-		if (freeit) {
+		if (TestClearPageHWPoison(p)) {
 			put_page(page);
 			ret = 0;
 		}
@@ -2424,7 +2422,7 @@ int unpoison_memory(unsigned long pfn)
 
 unlock_mutex:
 	mutex_unlock(&mf_mutex);
-	if (!ret || freeit) {
+	if (!ret) {
 		if (!huge)
 			num_poisoned_pages_sub(pfn, 1);
 		unpoison_pr_info("Unpoison: Software-unpoisoned page %#lx\n",
_

Patches currently in -mm which might be from mawupeng1@huawei.com are

mm-memory-failurec-cleanup-in-unpoison_memory.patch