Commit fa3015b7 authored Jun 07, 2018 by Matthew Wilcox Committed by Linus Torvalds Jun 07, 2018

mm: use page->deferred_list

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

Link: http://lkml.kernel.org/r/20180518194519.3820-9-willy@infradead.org


Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Jérôme Glisse <jglisse@redhat.com>
Cc: Lai Jiangshan <jiangshanlai@gmail.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 66a6ffd2

mm/huge_memory.c

+2 −5

Original line number	Diff line number	Diff line
		@@ -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)

mm/page_alloc.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -952,7 +952,7 @@ 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: