linux-kernel - [tip:x86/asm] x86/entry: Inline enter_from_user

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Message-ID: <tip-eec4b1227db153ca16f8f5f285d01fefdce05438@git.kernel.org>
Date:	Sat, 9 Jul 2016 04:53:16 -0700
From:	tip-bot for Paolo Bonzini <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, peterz@...radead.org,
	riel@...hat.com, bp@...en8.de, torvalds@...ux-foundation.org,
	hpa@...or.com, mingo@...nel.org, pbonzini@...hat.com,
	luto@...nel.org, tglx@...utronix.de, brgerst@...il.com,
	dvlasenk@...hat.com, jpoimboe@...hat.com
Subject: [tip:x86/asm] x86/entry: Inline enter_from_user_mode()

Commit-ID:  eec4b1227db153ca16f8f5f285d01fefdce05438
Gitweb:     http://git.kernel.org/tip/eec4b1227db153ca16f8f5f285d01fefdce05438
Author:     Paolo Bonzini <pbonzini@...hat.com>
AuthorDate: Mon, 20 Jun 2016 16:58:30 +0200
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Sat, 9 Jul 2016 10:44:02 +0200

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@...hat.com>
Reviewed-by: Rik van Riel <riel@...hat.com>
Reviewed-by: Andy Lutomirski <luto@...nel.org>
Reviewed-by: Rik van Riel <riel@...hat.com>
Reviewed-by: Andy Lutomirski <luto@...nel.org>
Reviewed-by: Rik van Riel <riel@...hat.com>
Reviewed-by: Andy Lutomirski <luto@...nel.org>
Reviewed-by: Rik van Riel <riel@...hat.com>
Reviewed-by: Andy Lutomirski <luto@...nel.org>
Acked-by: Paolo Bonzini <pbonzini@...hat.com>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Brian Gerst <brgerst@...il.com>
Cc: Denys Vlasenko <dvlasenk@...hat.com>
Cc: H. Peter Anvin <hpa@...or.com>
Cc: Josh Poimboeuf <jpoimboe@...hat.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: kvm@...r.kernel.org
Link: http://lkml.kernel.org/r/1466434712-31440-3-git-send-email-pbonzini@redhat.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/entry/common.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/entry/common.c b/arch/x86/entry/common.c
index 618bc61..9e1e27d 100644
--- a/arch/x86/entry/common.c
+++ b/arch/x86/entry/common.c
@@ -40,7 +40,7 @@ static struct thread_info *pt_regs_to_thread_info(struct pt_regs *regs)
 
 #ifdef CONFIG_CONTEXT_TRACKING
 /* 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);
 	user_exit_irqoff();