mm, hwpoison: use ClearPageHWPoison() in memory_failure()

Patch series "A few cleanup patches for memory-failure".

his series contains a few cleanup patches to use __PageMovable() to detect
non-lru movable pages, use num_poisoned_pages_sub() to reduce multiple
atomic ops overheads and so on.  More details can be found in the
respective changelogs.

This patch (of 6):

Use ClearPageHWPoison() instead of TestClearPageHWPoison() to clear page
hwpoison flags to avoid unneeded full memory barrier overhead.

Link: https://lkml.kernel.org/r/20220830123604.25763-1-linmiaohe@huawei.com
Link: https://lkml.kernel.org/r/20220830123604.25763-2-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Acked-by: Naoya Horiguchi <naoya.horiguchi@nec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 2653782..3fb3cd8 100644 (file)
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -2131,7 +2131,7 @@ try_again:
        page_flags = p->flags;
 
        if (hwpoison_filter(p)) {
-               TestClearPageHWPoison(p);
+               ClearPageHWPoison(p);
                unlock_page(p);
                put_page(p);
                res = -EOPNOTSUPP;