From: Matthew Wilcox <mawilcox@xxxxxxxxxxxxx> Subject: 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@xxxxxxxxxxxxx Signed-off-by: Matthew Wilcox <mawilcox@xxxxxxxxxxxxx> Acked-by: Vlastimil Babka <vbabka@xxxxxxx> Acked-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx> Cc: Christoph Lameter <cl@xxxxxxxxx> Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx> Cc: Jérôme Glisse <jglisse@xxxxxxxxxx> Cc: Lai Jiangshan <jiangshanlai@xxxxxxxxx> Cc: Martin Schwidefsky <schwidefsky@xxxxxxxxxx> Cc: Pekka Enberg <penberg@xxxxxxxxxx> Cc: Randy Dunlap <rdunlap@xxxxxxxxxxxxx> Cc: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/huge_memory.c | 7 ++----- mm/page_alloc.c | 2 +- 2 files changed, 3 insertions(+), 6 deletions(-) diff -puN mm/huge_memory.c~mm-use-page-deferred_list mm/huge_memory.c --- a/mm/huge_memory.c~mm-use-page-deferred_list +++ a/mm/huge_memory.c @@ -483,11 +483,8 @@ pmd_t maybe_pmd_mkwrite(pmd_t pmd, struc 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 -puN mm/page_alloc.c~mm-use-page-deferred_list mm/page_alloc.c --- a/mm/page_alloc.c~mm-use-page-deferred_list +++ a/mm/page_alloc.c @@ -952,7 +952,7 @@ static int free_tail_pages_check(struct case 2: /* * the second tail page: ->mapping is - * page_deferred_list().next -- ignore value. + * deferred_list.next -- ignore value. */ break; default: _ -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
