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| author | Ingo Molnar <mingo@elte.hu> | 2008-11-12 12:39:21 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-11-12 12:39:21 +0100 |
| commit | 708b8eae0fd532af73ea8350e6dcc10255ff7376 (patch) | |
| tree | f336436934fd79bc91aff7112a9beb10bc4e839f /mm/page_alloc.c | |
| parent | d98d38f2014ab79f28c126ff175d034891f7aefc (diff) | |
| parent | f21f237cf55494c3a4209de323281a3b0528da10 (diff) | |
| download | kernel_samsung_smdk4412-708b8eae0fd532af73ea8350e6dcc10255ff7376.tar.gz kernel_samsung_smdk4412-708b8eae0fd532af73ea8350e6dcc10255ff7376.tar.bz2 kernel_samsung_smdk4412-708b8eae0fd532af73ea8350e6dcc10255ff7376.zip | |
Merge branch 'linus' into core/locking
Diffstat (limited to 'mm/page_alloc.c')
| -rw-r--r-- | mm/page_alloc.c | 28 |
1 files changed, 21 insertions, 7 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index d0a240fbb8b..54069e64e3a 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -263,24 +263,39 @@ void prep_compound_page(struct page *page, unsigned long order) { int i; int nr_pages = 1 << order; + + set_compound_page_dtor(page, free_compound_page); + set_compound_order(page, order); + __SetPageHead(page); + for (i = 1; i < nr_pages; i++) { + struct page *p = page + i; + + __SetPageTail(p); + p->first_page = page; + } +} + +#ifdef CONFIG_HUGETLBFS +void prep_compound_gigantic_page(struct page *page, unsigned long order) +{ + int i; + int nr_pages = 1 << order; struct page *p = page + 1; set_compound_page_dtor(page, free_compound_page); set_compound_order(page, order); __SetPageHead(page); - for (i = 1; i < nr_pages; i++, p++) { - if (unlikely((i & (MAX_ORDER_NR_PAGES - 1)) == 0)) - p = pfn_to_page(page_to_pfn(page) + i); + for (i = 1; i < nr_pages; i++, p = mem_map_next(p, page, i)) { __SetPageTail(p); p->first_page = page; } } +#endif static void destroy_compound_page(struct page *page, unsigned long order) { int i; int nr_pages = 1 << order; - struct page *p = page + 1; if (unlikely(compound_order(page) != order)) bad_page(page); @@ -288,9 +303,8 @@ static void destroy_compound_page(struct page *page, unsigned long order) if (unlikely(!PageHead(page))) bad_page(page); __ClearPageHead(page); - for (i = 1; i < nr_pages; i++, p++) { - if (unlikely((i & (MAX_ORDER_NR_PAGES - 1)) == 0)) - p = pfn_to_page(page_to_pfn(page) + i); + for (i = 1; i < nr_pages; i++) { + struct page *p = page + i; if (unlikely(!PageTail(p) | (p->first_page != page))) |