diff options
author | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-17 13:13:16 -0700 |
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committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-17 13:13:16 -0700 |
commit | d20ead9e86881bc7ae84e385f47b5196b7d93aac (patch) | |
tree | ed27dd5db5f8447e4b3f541f0ec38219085d2f32 /include/asm-x86/unaligned.h | |
parent | c56ec7639288f3e5d6371b0c48d37da93642fc93 (diff) | |
parent | 88e4d250234fc9e64d6ce51df95efdcf8334fd95 (diff) |
Merge ssh://master.kernel.org/pub/scm/linux/kernel/git/tglx/linux-2.6-x86
* ssh://master.kernel.org/pub/scm/linux/kernel/git/tglx/linux-2.6-x86: (114 commits)
x86: delete vsyscall files during make clean
kbuild: fix typo SRCARCH in find_sources
x86: fix kernel rebuild due to vsyscall fallout
.gitignore update for x86 arch
x86: unify include/asm/debugreg_32/64.h
x86: unify include/asm/unwind_32/64.h
x86: unify include/asm/types_32/64.h
x86: unify include/asm/tlb_32/64.h
x86: unify include/asm/siginfo_32/64.h
x86: unify include/asm/bug_32/64.h
x86: unify include/asm/mman_32/64.h
x86: unify include/asm/agp_32/64.h
x86: unify include/asm/kdebug_32/64.h
x86: unify include/asm/ioctls_32/64.h
x86: unify include/asm/floppy_32/64.h
x86: apply missing DMA/OOM prevention to floppy_32.h
x86: unify include/asm/cache_32/64.h
x86: unify include/asm/cache_32/64.h
x86: unify include/asm/dmi_32/64.h
x86: unify include/asm/delay_32/64.h
...
Diffstat (limited to 'include/asm-x86/unaligned.h')
-rw-r--r-- | include/asm-x86/unaligned.h | 42 |
1 files changed, 37 insertions, 5 deletions
diff --git a/include/asm-x86/unaligned.h b/include/asm-x86/unaligned.h index 68067150fbc..913598d4f76 100644 --- a/include/asm-x86/unaligned.h +++ b/include/asm-x86/unaligned.h @@ -1,5 +1,37 @@ -#ifdef CONFIG_X86_32 -# include "unaligned_32.h" -#else -# include "unaligned_64.h" -#endif +#ifndef _ASM_X86_UNALIGNED_H +#define _ASM_X86_UNALIGNED_H + +/* + * The x86 can do unaligned accesses itself. + * + * The strange macros are there to make sure these can't + * be misused in a way that makes them not work on other + * architectures where unaligned accesses aren't as simple. + */ + +/** + * get_unaligned - get value from possibly mis-aligned location + * @ptr: pointer to value + * + * This macro should be used for accessing values larger in size than + * single bytes at locations that are expected to be improperly aligned, + * e.g. retrieving a u16 value from a location not u16-aligned. + * + * Note that unaligned accesses can be very expensive on some architectures. + */ +#define get_unaligned(ptr) (*(ptr)) + +/** + * put_unaligned - put value to a possibly mis-aligned location + * @val: value to place + * @ptr: pointer to location + * + * This macro should be used for placing values larger in size than + * single bytes at locations that are expected to be improperly aligned, + * e.g. writing a u16 value to a location not u16-aligned. + * + * Note that unaligned accesses can be very expensive on some architectures. + */ +#define put_unaligned(val, ptr) ((void)( *(ptr) = (val) )) + +#endif /* _ASM_X86_UNALIGNED_H */ |