Re: [PATCH 1/2] x86/entry: Avoid interrupt flag save and restore
From: Andy Lutomirski
Date: Sat Jun 04 2016 - 01:08:28 EST
On May 30, 2016 5:30 AM, "Paolo Bonzini" <pbonzini@xxxxxxxxxx> wrote:
> Thanks to all the work that was done by Andy Lutomirski and others,
> enter_from_user_mode and prepare_exit_to_usermode are now called only with
> interrupts disabled. Let's provide them a version of user_enter/user_exit
> that skips saving and restoring the interrupt flag.
> +/* Called with interrupts disabled. */
> +static inline void __user_enter(void)
> + if (context_tracking_is_enabled())
> + __context_tracking_enter(CONTEXT_USER);
Would user_enter_irqs_off be a better name?