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x86/entry: Inline enter_from_user_mode() 

This matches what is already done for prepare_exit_to_usermode(),
and saves about 60 clock cycles (4% speedup) with the benchmark
in the previous commit message.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
Reviewed-by: Andy Lutomirski <luto@kernel.org>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: kvm@vger.kernel.org
Link: http://lkml.kernel.org/r/1466434712-31440-3-git-send-email-pbonzini@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Paolo Bonzini 2016-06-20 16:58:30 +02:00 committed by Ingo Molnar
parent 2e9d1e150a
commit be8a18e2e9
1 changed files with 1 additions and 1 deletions
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2
arch/x86/entry/common.c
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@ -40,7 +40,7 @@ static struct thread_info *pt_regs_to_thread_info(struct pt_regs *regs)
#ifdef CONFIG_CONTEXT_TRACKING #ifdef CONFIG_CONTEXT_TRACKING
/* Called on entry from user mode with IRQs off. */ /* Called on entry from user mode with IRQs off. */
__visible void enter_from_user_mode(void) __visible inline void enter_from_user_mode(void)
{ {
CT_WARN_ON(ct_state() != CONTEXT_USER); CT_WARN_ON(ct_state() != CONTEXT_USER);
user_exit_irqoff(); user_exit_irqoff();