x86, cpufeature: If we disable CLFLUSH, we should disable CLFLUSHOPT

If we explicitly disable the use of CLFLUSH, we should disable the use
of CLFLUSHOPT as well.

Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Link: http://lkml.kernel.org/n/tip-jtdv7btppr4jgzxm3sxx1e74@git.kernel.org

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 2c6ac6f2b5b1340a4af3cd20bd6810257c39eba9..cca53d88762a88aa994a178ef47f060f489def68 100644 (file)
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1026,6 +1026,7 @@ __setup("show_msr=", setup_show_msr);
 static __init int setup_noclflush(char *arg)
 {
        setup_clear_cpu_cap(X86_FEATURE_CLFLUSH);
+       setup_clear_cpu_cap(X86_FEATURE_CLFLUSHOPT);
        return 1;
 }
 __setup("noclflush", setup_noclflush);