diff options
| author | Borislav Petkov <[email protected]> | 2016-03-16 13:19:29 +0100 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2016-03-29 12:57:12 +0200 |
| commit | b3edfda4382ffaef5e5c1cffb25a33b3b9ef4546 (patch) | |
| tree | 1a3b034de56b2aea67611af1423e74ca2c51634d | |
| parent | 1993b176a8224e371e0732ffada7ab9eb3b0912b (diff) | |
x86/cpu: Do the feature test first in enable_sep_cpu()
... before assigning local vars. Kill out label too and simplify.
No functionality change.
Signed-off-by: Borislav Petkov <[email protected]>
Acked-by: Andy Lutomirski <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
| -rw-r--r-- | arch/x86/kernel/cpu/common.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c index 8394b3d1f94f..7fea4079d102 100644 --- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c @@ -1076,12 +1076,12 @@ void enable_sep_cpu(void) struct tss_struct *tss; int cpu; + if (!boot_cpu_has(X86_FEATURE_SEP)) + return; + cpu = get_cpu(); tss = &per_cpu(cpu_tss, cpu); - if (!boot_cpu_has(X86_FEATURE_SEP)) - goto out; - /* * We cache MSR_IA32_SYSENTER_CS's value in the TSS's ss1 field -- * see the big comment in struct x86_hw_tss's definition. @@ -1096,7 +1096,6 @@ void enable_sep_cpu(void) wrmsr(MSR_IA32_SYSENTER_EIP, (unsigned long)entry_SYSENTER_32, 0); -out: put_cpu(); } #endif |