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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>
This commit is contained in:
Matthew Wilcox 2018-06-07 17:08:42 -07:00 committed by Linus Torvalds
parent 66a6ffd2af
commit fa3015b7ee
2 changed files with 3 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
mm/huge_memory.c
View File

@ -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)

2
mm/page_alloc.c
View File

@ -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: