[S] Change in coreboot[main]: x86/include/arch/cpuid.h: Fix inline assembly

[Patrick Rudolph (Code Review)]

Attention is currently required from: Patrick Rudolph.

Hello Felix Held, Krystian Hebel, Paul Menzel, build bot (Jenkins),

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/78192?usp=email

to look at the new patch set (#2).

Change subject: x86/include/arch/cpuid.h: Fix inline assembly
......................................................................

x86/include/arch/cpuid.h: Fix inline assembly

In the cpuid helper functions eax is always written to
by the cpuid instruction, so add it to the output clobbered list.

This prevents GCC from generating code with undefined behaviour
when the function is inlined.

Test: Verified that the generated assembly is sane and runtime
      tests showed no "strange" behaviour when calling cpuid
      functions.

Change-Id: I5dc0bb620184a355716b9c8d4206d55554b41ab9
Signed-off-by: Patrick Rudolph 
---
M src/arch/x86/include/arch/cpuid.h
1 file changed, 9 insertions(+), 12 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/92/78192/2