+ mm-damon-remove-redundant-page-validation.patch added to -mm tree

[akpm@linux-foundation.org]

The patch titled
     Subject: mm/damon: remove redundant page validation
has been added to the -mm tree.  Its filename is
     mm-damon-remove-redundant-page-validation.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/mm-damon-remove-redundant-page-validation.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/mm-damon-remove-redundant-page-validation.patch

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------------------------------------------------------
From: Baolin Wang <baolin.wang@linux.alibaba.com>
Subject: mm/damon: remove redundant page validation

It will never get a NULL page by pte_page() as discussed in thread [1],
thus remove the redundant page validation to fix below Smatch static
checker warning.

    mm/damon/vaddr.c:405 damon_hugetlb_mkold()
    warn: 'page' can't be NULL.

[1] https://lore.kernel.org/linux-mm/20220106091200.GA14564@kili/

Link: https://lkml.kernel.org/r/6d32f7d201b8970d53f51b6c5717d472aed2987c.1642386715.git.baolin.wang@linux.alibaba.com
Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Acked-by: David Rientjes <rientjes@google.com>
Acked-by: Souptick Joarder <jrdr.linux@gmail.com>
Reviewed-by: Miaohe Lin <linmiaohe@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/damon/vaddr.c |    6 ------
 1 file changed, 6 deletions(-)

--- a/mm/damon/vaddr.c~mm-damon-remove-redundant-page-validation
+++ a/mm/damon/vaddr.c
@@ -402,9 +402,6 @@ static void damon_hugetlb_mkold(pte_t *p
 	pte_t entry = huge_ptep_get(pte);
 	struct page *page = pte_page(entry);
 
-	if (!page)
-		return;
-
 	get_page(page);
 
 	if (pte_young(entry)) {
@@ -564,9 +561,6 @@ static int damon_young_hugetlb_entry(pte
 		goto out;
 
 	page = pte_page(entry);
-	if (!page)
-		goto out;
-
 	get_page(page);
 
 	if (pte_young(entry) || !page_is_idle(page) ||
_

Patches currently in -mm which might be from baolin.wang@linux.alibaba.com are

mm-damon-remove-redundant-page-validation.patch