Commit 5d570cbb authored Mar 11, 2008 by Mikael Pettersson Committed by Ingo Molnar Apr 17, 2008

x86: correct/clarify comment in nops.h



<asm-x86/nops.h> describes certain multibyte instructions as
"generic" nops when in fact they aren't nops at all in 64-bit
mode (missing REX.W causing truncation of a register).

Update the comment to state that K8 or P6 style nops should be
used in 64-bit mode. This matches what the alternatives code does.

Signed-off-by: Mikael Pettersson <mikpe@it.uu.se>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

parent 1415d160

include/asm-x86/nops.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -5,6 +5,8 @@

		/* generic versions from gas
		1: nop
		the following instructions are NOT nops in 64-bit mode,
		for 64-bit mode use K8 or P6 nops instead
		2: movl %esi,%esi
		3: leal 0x00(%esi),%esi
		4: leal 0x00(,%esi,1),%esi

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