+ mm-z3fold-remove-unneeded-spinlock.patch added to mm-unstable branch

+ mm-z3fold-remove-unneeded-spinlock.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm/z3fold: remove unneeded spinlock
has been added to the -mm mm-unstable branch.  Its filename is
     mm-z3fold-remove-unneeded-spinlock.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-z3fold-remove-unneeded-spinlock.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: Zhongkun He <hezhongkun.hzk@bytedance.com>
Subject: mm/z3fold: remove unneeded spinlock
Date: Sun, 4 Feb 2024 20:54:04 +0800

There is no need to use spinlock in this section, so remove it.

Link: https://lkml.kernel.org/r/20240204125404.2112384-1-hezhongkun.hzk@bytedance.com
Signed-off-by: Zhongkun He <hezhongkun.hzk@bytedance.com>
Cc: Domenico Cerasuolo <cerasuolodomenico@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/z3fold.c |    2 --
 1 file changed, 2 deletions(-)

--- a/mm/z3fold.c~mm-z3fold-remove-unneeded-spinlock
+++ a/mm/z3fold.c
@@ -442,8 +442,6 @@ static void __release_z3fold_page(struct
 	WARN_ON(!list_empty(&zhdr->buddy));
 	set_bit(PAGE_STALE, &page->private);
 	clear_bit(NEEDS_COMPACTING, &page->private);
-	spin_lock(&pool->lock);
-	spin_unlock(&pool->lock);
 
 	if (locked)
 		z3fold_page_unlock(zhdr);
_

Patches currently in -mm which might be from hezhongkun.hzk@bytedance.com are

mm-z3fold-remove-unneeded-spinlock-in-z3fold_alloc.patch
mm-z3fold-remove-unneeded-spinlock.patch