x86, alternative, doc: Add comment for applying alternatives order

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Some string operation functions may be patched twice, e.g. on enhanced REP MOVSB
/STOSB processors, memcpy is patched first by fast string alternative function,
then it is patched by enhanced REP MOVSB/STOSB alternative function.

Add comment for applying alternatives order to warn people who may change the
applying alternatives order for any reason.

[ Documentation-only patch ]

Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Link: http://lkml.kernel.org/r/1305671358-14478-4-git-send-email-fenghua.yu@intel.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

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Fenghua Yu 2011-05-17 15:29:12 -07:00 • committed by H. Peter Anvin

parent 161ec53c70

commit 5097313363

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arch/x86/kernel/alternative.c

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