[merged mm-stable] mm-huge_memory-mark-racy-access-onhuge_anon_orders_always.patch removed from -mm tree

[merged mm-stable] mm-huge_memory-mark-racy-access-onhuge_anon_orders_always.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm/huge_memory: mark racy access onhuge_anon_orders_always
has been removed from the -mm tree.  Its filename was
     mm-huge_memory-mark-racy-access-onhuge_anon_orders_always.patch

This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: Ran Xiaokai <ran.xiaokai@zte.com.cn>
Subject: mm/huge_memory: mark racy access onhuge_anon_orders_always
Date: Wed, 15 May 2024 10:47:54 +0800 (CST)

huge_anon_orders_always is accessed lockless, it is better to use the
READ_ONCE() wrapper.  This is not fixing any visible bug, hopefully this
can cease some KCSAN complains in the future.  Also do that for
huge_anon_orders_madvise.

Link: https://lkml.kernel.org/r/20240515104754889HqrahFPePOIE1UlANHVAh@zte.com.cn
Signed-off-by: Ran Xiaokai <ran.xiaokai@zte.com.cn>
Acked-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Lu Zhongjun <lu.zhongjun@zte.com.cn>
Reviewed-by: xu xin <xu.xin16@zte.com.cn>
Cc: Yang Yang <yang.yang29@zte.com.cn>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Yang Shi <shy828301@gmail.com>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/linux/huge_mm.h |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/include/linux/huge_mm.h~mm-huge_memory-mark-racy-access-onhuge_anon_orders_always
+++ a/include/linux/huge_mm.h
@@ -134,8 +134,8 @@ static inline bool hugepage_flags_enable
 	 * So we don't need to look at huge_anon_orders_inherit.
 	 */
 	return hugepage_global_enabled() ||
-	       huge_anon_orders_always ||
-	       huge_anon_orders_madvise;
+	       READ_ONCE(huge_anon_orders_always) ||
+	       READ_ONCE(huge_anon_orders_madvise);
 }
 
 static inline int highest_order(unsigned long orders)
_

Patches currently in -mm which might be from ran.xiaokai@zte.com.cn are