提交 b3edfda4 编写于 作者: B Borislav Petkov 提交者: Ingo Molnar

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: NBorislav Petkov <bp@suse.de>
Acked-by: NAndy Lutomirski <luto@kernel.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1458130769-24963-1-git-send-email-bp@alien8.deSigned-off-by: NIngo Molnar <mingo@kernel.org>
上级 1993b176
......@@ -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
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册