[PATCH 02/10] x86 tsc_msr: Identify Intel-specific code

Len Brown
2016-06-17T05:25:40Z

From: Len Brown <len.brown@intel.com>

try_msr_calibrate_tsc() is currently Intel-specific,
and should not execute on any other vendor's parts.

Signed-off-by: Len Brown <len.brown@intel.com>
---
arch/x86/kernel/tsc_msr.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/arch/x86/kernel/tsc_msr.c b/arch/x86/kernel/tsc_msr.c
index 6aa0f4d..4ec5e56 100644
--- a/arch/x86/kernel/tsc_msr.c
+++ b/arch/x86/kernel/tsc_msr.c
@@ -86,6 +86,9 @@ unsigned long try_msr_calibrate_tsc(void)
unsigned long res;
int cpu_index;

+ if (boot_cpu_data.x86_vendor != X86_VENDOR_INTEL)
+ return 0;
+
cpu_index = match_cpu(boot_cpu_data.x86, boot_cpu_data.x86_model);
if (cpu_index < 0)
return 0;
--
2.9.0