linux-kernel - [PATCH v2 1/7] fs/proc/page: remove unneeded PageTail && PageSlab check

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Date:   Fri, 10 Nov 2023 11:33:18 +0800
From:   Kefeng Wang <wangkefeng.wang@...wei.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
CC:     <linux-kernel@...r.kernel.org>, <linux-mm@...ck.org>,
        Matthew Wilcox <willy@...radead.org>,
        David Hildenbrand <david@...hat.com>,
        Gregory Price <gregory.price@...verge.com>,
        Kefeng Wang <wangkefeng.wang@...wei.com>
Subject: [PATCH v2 1/7] fs/proc/page: remove unneeded PageTail && PageSlab check

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.

Signed-off-by: Kefeng Wang <wangkefeng.wang@...wei.com>
---
 fs/proc/page.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/fs/proc/page.c b/fs/proc/page.c
index 195b077c0fac..466efb0dadf7 100644
--- a/fs/proc/page.c
+++ b/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);
-- 
2.27.0