[BYTEORDER]: Document alignment and byteorder macros (e0487992) · Commits · 戴 / test

This patch comments the fact that although passing le64_to_cpup et al. is within the intended use of the byteorder macros, using get_unaligned is the recommended way to go. Signed-off-by:

Ed L. Cashin <ecashin@coraid.com> Signed-off-by:

David S. Miller <davem@davemloft.net>

include/linux/byteorder/generic.h

+4 −0

Original line number	Diff line number	Diff line
		@@ -5,6 +5,10 @@
		* linux/byteorder_generic.h
		* Generic Byte-reordering support
		*
		* The "... p" macros, like le64_to_cpup, can be used with pointers
		* to unaligned data, but there will be a performance penalty on
		* some architectures. Use get_unaligned for unaligned data.
		*
		* Francois-Rene Rideau <fare@tunes.org> 19970707
		* gathered all the good ideas from all asm-foo/byteorder.h into one file,
		* cleaned them up.

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