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| author | Anisse Astier <anisse@astier.eu> | 2015-06-25 01:56:36 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-06-25 02:49:42 +0200 |
| commit | f4d2897b930cb546d435f64fd4b74ea5d1223dff (patch) | |
| tree | e3a8aa330d6cb5fc4acdc1eef455b0bb26779c63 | |
| parent | mm: avoid tail page refcounting on non-THP compound pages (diff) | |
| download | linux-f4d2897b930cb546d435f64fd4b74ea5d1223dff.tar.xz linux-f4d2897b930cb546d435f64fd4b74ea5d1223dff.zip | |
mm/page_alloc.c: cleanup obsolete KM_USER*
It's been five years now that KM_* kmap flags have been removed and that
we can call clear_highpage from any context. So we remove prep_zero_pages
accordingly.
Signed-off-by: Anisse Astier <anisse@astier.eu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/page_alloc.c | 17 |
1 files changed, 2 insertions, 15 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 159dbbc3375d..7a5cbe7cc9b6 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -380,20 +380,6 @@ void prep_compound_page(struct page *page, unsigned long order) } } -static inline void prep_zero_page(struct page *page, unsigned int order, - gfp_t gfp_flags) -{ - int i; - - /* - * clear_highpage() will use KM_USER0, so it's a bug to use __GFP_ZERO - * and __GFP_HIGHMEM from hard or soft interrupt context. - */ - VM_BUG_ON((gfp_flags & __GFP_HIGHMEM) && in_interrupt()); - for (i = 0; i < (1 << order); i++) - clear_highpage(page + i); -} - #ifdef CONFIG_DEBUG_PAGEALLOC unsigned int _debug_guardpage_minorder; bool _debug_pagealloc_enabled __read_mostly; @@ -975,7 +961,8 @@ static int prep_new_page(struct page *page, unsigned int order, gfp_t gfp_flags, kasan_alloc_pages(page, order); if (gfp_flags & __GFP_ZERO) - prep_zero_page(page, order, gfp_flags); + for (i = 0; i < (1 << order); i++) + clear_highpage(page + i); if (order && (gfp_flags & __GFP_COMP)) prep_compound_page(page, order); |