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From: Matthew Wilcox <willy@infradead.org>
To: linux-mm@kvack.org
Cc: Matthew Wilcox <mawilcox@microsoft.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
	Christoph Lameter <cl@linux.com>,
	Lai Jiangshan <laijs@cn.fujitsu.com>,
	Pekka Enberg <penberg@kernel.org>,
	Vlastimil Babka <vbabka@suse.cz>
Subject: [PATCH v3 09/14] mm: Use page->deferred_list
Date: Wed, 18 Apr 2018 11:49:07 -0700	[thread overview]
Message-ID: <20180418184912.2851-10-willy@infradead.org> (raw)
In-Reply-To: <20180418184912.2851-1-willy@infradead.org>

From: Matthew Wilcox <mawilcox@microsoft.com>

Now that we can represent the location of 'deferred_list' in C instead
of comments, make use of that ability.

Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
---
 mm/huge_memory.c | 7 ++-----
 mm/page_alloc.c  | 2 +-
 2 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 14ed6ee5e02f..55ad852fbf17 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -483,11 +483,8 @@ pmd_t maybe_pmd_mkwrite(pmd_t pmd, struct vm_area_struct *vma)
 
 static inline struct list_head *page_deferred_list(struct page *page)
 {
-	/*
-	 * ->lru in the tail pages is occupied by compound_head.
-	 * Let's use ->mapping + ->index in the second tail page as list_head.
-	 */
-	return (struct list_head *)&page[2].mapping;
+	/* ->lru in the tail pages is occupied by compound_head. */
+	return &page[2].deferred_list;
 }
 
 void prep_transhuge_page(struct page *page)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 88e817d7ccef..18720eccbce1 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -953,7 +953,7 @@ static int free_tail_pages_check(struct page *head_page, struct page *page)
 	case 2:
 		/*
 		 * the second tail page: ->mapping is
-		 * page_deferred_list().next -- ignore value.
+		 * deferred_list.next -- ignore value.
 		 */
 		break;
 	default:
-- 
2.17.0

  parent reply	other threads:[~2018-04-18 18:49 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-18 18:48 [PATCH v3 00/14] Rearrange struct page Matthew Wilcox
2018-04-18 18:48 ` [PATCH v3 01/14] s390: Use _refcount for pgtables Matthew Wilcox
2018-04-18 18:49 ` [PATCH v3 02/14] mm: Split page_type out from _mapcount Matthew Wilcox
2018-04-19  9:04   ` Vlastimil Babka
2018-04-19 11:16     ` Matthew Wilcox
2018-04-20 15:17   ` Christopher Lameter
2018-04-20 20:43     ` Matthew Wilcox
2018-04-18 18:49 ` [PATCH v3 03/14] mm: Mark pages in use for page tables Matthew Wilcox
2018-04-19  9:30   ` Vlastimil Babka
2018-04-18 18:49 ` [PATCH v3 04/14] mm: Switch s_mem and slab_cache in struct page Matthew Wilcox
2018-04-19 11:06   ` Vlastimil Babka
2018-04-19 11:19     ` Matthew Wilcox
2018-04-18 18:49 ` [PATCH v3 05/14] mm: Move 'private' union within " Matthew Wilcox
2018-04-19 11:31   ` Vlastimil Babka
2018-04-20 15:25   ` Christopher Lameter
2018-04-20 20:27     ` Matthew Wilcox
2018-04-30  9:38   ` Kirill A. Shutemov
2018-04-18 18:49 ` [PATCH v3 06/14] mm: Move _refcount out of struct page union Matthew Wilcox
2018-04-19 11:37   ` Vlastimil Babka
2018-04-30  9:40   ` Kirill A. Shutemov
2018-04-18 18:49 ` [PATCH v3 07/14] slub: Remove page->counters Matthew Wilcox
2018-04-19 13:42   ` Vlastimil Babka
2018-04-19 14:23     ` Matthew Wilcox
2018-04-18 18:49 ` [PATCH v3 08/14] mm: Combine first three unions in struct page Matthew Wilcox
2018-04-19 13:46   ` Vlastimil Babka
2018-04-19 14:08     ` Matthew Wilcox
2018-04-30  9:42   ` Kirill A. Shutemov
2018-04-18 18:49 ` Matthew Wilcox [this message]
2018-04-19 13:23   ` [PATCH v3 09/14] mm: Use page->deferred_list Vlastimil Babka
2018-04-30  9:43   ` Kirill A. Shutemov
2018-04-18 18:49 ` [PATCH v3 10/14] mm: Move lru union within struct page Matthew Wilcox
2018-04-19 13:56   ` Vlastimil Babka
2018-04-30  9:44   ` Kirill A. Shutemov
2018-04-18 18:49 ` [PATCH v3 11/14] mm: Combine first two unions in " Matthew Wilcox
2018-04-19 14:03   ` Vlastimil Babka
2018-04-30  9:47   ` Kirill A. Shutemov
2018-04-30 12:42     ` Matthew Wilcox
2018-04-30 13:12       ` Kirill A. Shutemov
2018-04-18 18:49 ` [PATCH v3 12/14] mm: Improve struct page documentation Matthew Wilcox
2018-04-18 23:32   ` Randy Dunlap
2018-04-18 23:43     ` Matthew Wilcox
2018-04-18 18:49 ` [PATCH v3 13/14] slab,slub: Remove rcu_head size checks Matthew Wilcox
2018-04-18 18:49 ` [PATCH v3 14/14] slub: Remove kmem_cache->reserved Matthew Wilcox

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