On Mon, 4 Apr 2005, Li Shaohua wrote:
> linux-2.6.11-root/arch/i386/kernel/smpboot.c | 6 ++++++
> linux-2.6.11-root/arch/i386/kernel/sysenter.c | 10 ++++++----
> linux-2.6.11-root/arch/i386/mach-voyager/voyager_smp.c | 6 ++++++
> 3 files changed, 18 insertions(+), 4 deletions(-)
>
> diff -puN arch/i386/kernel/sysenter.c~sep_init_cleanup
> arch/i386/kernel/sysenter.c
> --- linux-2.6.11/arch/i386/kernel/sysenter.c~sep_init_cleanup 2005-03-28
> 09:32:30.936304248 +0800
> +++ linux-2.6.11-root/arch/i386/kernel/sysenter.c 2005-03-28
> 09:58:20.703703792 +0800
> @@ -26,6 +26,11 @@ void enable_sep_cpu(void *info)
> int cpu = get_cpu();
> struct tss_struct *tss = &per_cpu(init_tss, cpu);
>
> + if (!boot_cpu_has(X86_FEATURE_SEP)) {
> + put_cpu();
> + return;
> + }
> +
Do you have systems like this? Is it really skipping SEP if the boot
processor doesn't have SEP?
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