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authorAnisse Astier <anisse@astier.eu>2015-06-25 01:56:36 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2015-06-25 02:49:42 +0200
commitf4d2897b930cb546d435f64fd4b74ea5d1223dff (patch)
treee3a8aa330d6cb5fc4acdc1eef455b0bb26779c63 /mm/page_alloc.c
parentmm: avoid tail page refcounting on non-THP compound pages (diff)
downloadlinux-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>
Diffstat (limited to '')
-rw-r--r--mm/page_alloc.c17
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);