[PATCH v4 1/4] x86/asm/32: Make sync_core() handle missing CPUID on all 32-bit kernels

From: Andy Lutomirski
Date: Fri Dec 09 2016 - 13:24:20 EST

We support various non-Intel CPUs that don't have the CPUID
instruction, so the M486 test was wrong. For now, fix it with a big
hammer: handle missing CPUID on all 32-bit CPUs.

Reported-by: One Thousand Gnomes <gnomes@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andy Lutomirski <luto@xxxxxxxxxx>
arch/x86/include/asm/processor.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index 984a7bf17f6a..64fbc937d586 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -595,7 +595,7 @@ static inline void sync_core(void)
int tmp;

-#ifdef CONFIG_M486
+#ifdef CONFIG_X86_32
* Do a CPUID if available, otherwise do a jump. The jump
* can conveniently enough be the jump around CPUID.