Messages in this thread Patch in this message |  | | Date | Thu, 10 May 2001 19:38:37 +0100 (BST) | From | John Levon <> | Subject | Re: [PATCH] Small kernel-api addition |
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On Thu, 10 May 2001, David Woodhouse wrote:
> I'd suggest s/that may be/that are expected to be/
thanks, how about this :
--- Documentation/DocBook/kernel-api.tmpl.old Thu May 10 18:02:05 2001 +++ Documentation/DocBook/kernel-api.tmpl Thu May 10 18:02:57 2001 @@ -41,8 +41,9 @@ !Iinclude/linux/init.h </sect1> - <sect1><title>Atomics</title> + <sect1><title>Atomic and pointer manipulation</title> !Iinclude/asm-i386/atomic.h +!Iinclude/asm-i386/unaligned.h </sect1> <sect1><title>Delaying, scheduling, and timer routines</title> --- include/asm-i386/unaligned.h.old Thu May 10 17:54:28 2001 +++ include/asm-i386/unaligned.h Thu May 10 19:38:55 2001 @@ -9,8 +9,29 @@ * 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 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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