+ fs-proc-page-remove-unneeded-pagetail-pageslab-check.patch added to mm-unstable branch

+ fs-proc-page-remove-unneeded-pagetail-pageslab-check.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: fs/proc/page: remove unneeded PageTail && PageSlab check
has been added to the -mm mm-unstable branch.  Its filename is
     fs-proc-page-remove-unneeded-pagetail-pageslab-check.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/fs-proc-page-remove-unneeded-pagetail-pageslab-check.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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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

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------------------------------------------------------
From: Kefeng Wang <wangkefeng.wang@huawei.com>
Subject: fs/proc/page: remove unneeded PageTail && PageSlab check
Date: Fri, 10 Nov 2023 11:33:18 +0800

Patch series "mm: remove page idle and young wrapper", v2.

Convert to use folio idle and young functions instead of page ones,
then remove all page idle and young wrapper.


This patch (of 7):

After commit dcb351cd095a ("page-flags: define behavior SL*B-related flags
on compound pages"), the slab could not be a tail, remove unneeded
PageTail && PageSlab check.

Link: https://lkml.kernel.org/r/20231110033324.2455523-1-wangkefeng.wang@huawei.com
Link: https://lkml.kernel.org/r/20231110033324.2455523-2-wangkefeng.wang@huawei.com
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Gregory Price <gregory.price@memverge.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 fs/proc/page.c |    3 ---
 1 file changed, 3 deletions(-)

--- a/fs/proc/page.c~fs-proc-page-remove-unneeded-pagetail-pageslab-check
+++ a/fs/proc/page.c
@@ -184,9 +184,6 @@ u64 stable_page_flags(struct page *page)
 	u |= kpf_copy_bit(k, KPF_LOCKED,	PG_locked);
 
 	u |= kpf_copy_bit(k, KPF_SLAB,		PG_slab);
-	if (PageTail(page) && PageSlab(page))
-		u |= 1 << KPF_SLAB;
-
 	u |= kpf_copy_bit(k, KPF_ERROR,		PG_error);
 	u |= kpf_copy_bit(k, KPF_DIRTY,		PG_dirty);
 	u |= kpf_copy_bit(k, KPF_UPTODATE,	PG_uptodate);
_

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

fs-proc-page-remove-unneeded-pagetail-pageslab-check.patch
fs-proc-page-use-a-folio-in-stable_page_flags.patch
fs-proc-page-respect-folio-head-page-flag-placement.patch
mm-huge_memory-use-more-folio-api-in-__split_huge_page_tail.patch
mm-task_mmu-use-a-folio-in-smaps_account.patch
mm-task_mmu-use-a-folio-in-clear_refs_pte_range.patch
page_idle-kill-page-idle-and-young-wrapper.patch