Re: [PATCH 1/2] x86/purgatory: add -mno-sse, -mno-mmx, -mno-sse2 to Makefile

On Wed, Jul 17, 2019 at 05:02:05PM -0700, Vaibhav Rustagi wrote:

Compiling the purgatory code with clang results in using of mmx registers.

$ objdump -d arch/x86/purgatory/purgatory.ro | grep xmm

 112:	0f 28 00             	movaps (%rax),%xmm0
 115:	0f 11 07             	movups %xmm0,(%rdi)
 122:	0f 28 00             	movaps (%rax),%xmm0
 125:	0f 11 47 10          	movups %xmm0,0x10(%rdi)

Add -mno-sse, -mno-mmx, -mno-sse2 to avoid generating SSE instructions.

Signed-off-by: Vaibhav Rustagi vaibhavrustagi@google.com

arch/x86/purgatory/Makefile | 1 + 1 file changed, 1 insertion(+)

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This is not the correct way to submit patches for inclusion in the stable kernel tree. Please read: https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html for how to do this properly.

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