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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2006-12-06 20:32:21 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.osdl.org> | 2006-12-07 08:39:21 -0800 |
| commit | ad76fb6b5a5183255279e0ab5260715481770678 (patch) | |
| tree | 31034294d70f5fc3d6166a76fe9b7f8cd19db0fd /include/asm-mips/highmem.h | |
| parent | a866374aecc90c7d90619727ccd851ac096b2fc7 (diff) | |
| download | linux-3.10-ad76fb6b5a5183255279e0ab5260715481770678.tar.gz linux-3.10-ad76fb6b5a5183255279e0ab5260715481770678.tar.bz2 linux-3.10-ad76fb6b5a5183255279e0ab5260715481770678.zip | |
[PATCH] mm: k{,um}map_atomic() vs in_atomic()
Make kmap_atomic/kunmap_atomic denote a pagefault disabled scope. All non
trivial implementations already do this anyway.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-mips/highmem.h')
| -rw-r--r-- | include/asm-mips/highmem.h | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/include/asm-mips/highmem.h b/include/asm-mips/highmem.h index c976bfaaba8..f8c8182f7f2 100644 --- a/include/asm-mips/highmem.h +++ b/include/asm-mips/highmem.h @@ -21,6 +21,7 @@ #include <linux/init.h> #include <linux/interrupt.h> +#include <linux/uaccess.h> #include <asm/kmap_types.h> /* undef for production */ @@ -70,11 +71,16 @@ static inline void *kmap(struct page *page) static inline void *kmap_atomic(struct page *page, enum km_type type) { + pagefault_disable(); return page_address(page); } -static inline void kunmap_atomic(void *kvaddr, enum km_type type) { } -#define kmap_atomic_pfn(pfn, idx) page_address(pfn_to_page(pfn)) +static inline void kunmap_atomic(void *kvaddr, enum km_type type) +{ + pagefault_enable(); +} + +#define kmap_atomic_pfn(pfn, idx) kmap_atomic(pfn_to_page(pfn), (idx)) #define kmap_atomic_to_page(ptr) virt_to_page(ptr) |