On Fri, Jan 22, 2016 at 04:56:05PM -0800, Andy Lutomirski wrote:
> If we have an FPU, there's no need to check CR0 for FPU emulation.
>
> Signed-off-by: Andy Lutomirski <[email protected]>
> ---
> arch/x86/kernel/traps.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c
> index 87f80febf477..183b300f6a8b 100644
> --- a/arch/x86/kernel/traps.c
> +++ b/arch/x86/kernel/traps.c
> @@ -752,7 +752,7 @@ do_device_not_available(struct pt_regs *regs, long
> error_code)
> RCU_LOCKDEP_WARN(!rcu_is_watching(), "entry code didn't wake RCU");
>
> #ifdef CONFIG_MATH_EMULATION
> - if (read_cr0() & X86_CR0_EM) {
> + if (!cpu_has_fpu && (read_cr0() & X86_CR0_EM)) {
Please use
boot_cpu_has(X86_FEATURE_FPU)
We want to kill those cpu_has_xxx things.
--
Regards/Gruss,
Boris.
ECO tip #101: Trim your mails when you reply.
