Messages in this thread Patch in this message | | | Date | Fri, 18 May 2018 00:31:35 +0300 | From | Alexey Dobriyan <> | Subject | [PATCH 2/3] x86: verify_cpu: use XOR for CPUID.EAX=0 |
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MOV eax, imm32 is 5 bytes. XOR eax, eax is 2 bytes.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> ---
arch/x86/kernel/verify_cpu.S | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/kernel/verify_cpu.S +++ b/arch/x86/kernel/verify_cpu.S @@ -51,7 +51,7 @@ ENTRY(verify_cpu) jz .Lverify_cpu_no_longmode # cpu has no cpuid #endif - movl $0x0,%eax # See if cpuid 1 is implemented + xor %eax, %eax # See if cpuid 1 is implemented cpuid cmpl $0x1,%eax jb .Lverify_cpu_no_longmode # no cpuid 1
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