Re: Andi, you broke my laptop :-)

[Pete Zaitcev <zaitcev@redhat.com>]

On Thu, 10 May 2007 15:35:56 +0200, "Joerg Roedel" <joerg.roedel@amd.com> wrote:

> I debugged this problem a bit and my compiler[1]interprets the =A
> constraint as %rax instead of %edx:%eax on x86_64 which causes the
> problem. The appended patch provides a workaround for this and fixed the
> hang on my machine.
> 
> [1] gcc version 4.1.3 20070429 (prerelease) (Debian 4.1.2-5)

>  	alternative_io(ASM_NOP3, ".byte 0x0f,0x01,0xf9", X86_FEATURE_RDTSCP,
> -			 	 "=A" (ret), "0" (0ULL) : "ecx", "memory");
> +		       ASM_OUTPUT2("=a" (eax), "=d" (edx)),
> +		       "a" (0U), "d" (0U) : "ecx", "memory");

This works for me. Thanks, Joerg.

gcc version 4.1.2 20070424 (Red Hat 4.1.2-11)

-- Pete