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From: Paolo Bonzini <pbonzini@redhat.com>
To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc: Andy Lutomirski <luto@kernel.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Rik van Riel <riel@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
	Ingo Molnar <mingo@kernel.org>,
	Thomas Gleixner <tglx@linutronix.de>
Subject: [PATCH 2/2] x86/entry: Inline enter_from_user_mode
Date: Mon, 20 Jun 2016 16:58:30 +0200	[thread overview]
Message-ID: <1466434712-31440-3-git-send-email-pbonzini@redhat.com> (raw)
In-Reply-To: <1466434712-31440-1-git-send-email-pbonzini@redhat.com>

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.

Cc: Andy Lutomirski <luto@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 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 618bc61d35b7..9e1e27d31c6d 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();
-- 
1.8.3.1

  parent reply	other threads:[~2016-06-20 15:00 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-06-20 14:58 [PATCH v2 0/2] x86/entry: speed up context-tracking system calls by 150 clock cycles Paolo Bonzini
2016-06-20 14:58 ` [PATCH 1/2] x86/entry: Avoid interrupt flag save and restore Paolo Bonzini
2016-06-20 20:21   ` Rik van Riel
2016-06-20 20:34   ` Andy Lutomirski
2016-07-09 11:52   ` [tip:x86/asm] " tip-bot for Paolo Bonzini
2016-07-10 11:37   ` tip-bot for Paolo Bonzini
2016-06-20 14:58 ` Paolo Bonzini [this message]
2016-06-20 20:22   ` [PATCH 2/2] x86/entry: Inline enter_from_user_mode Rik van Riel
2016-07-09 11:53   ` [tip:x86/asm] x86/entry: Inline enter_from_user_mode() tip-bot for Paolo Bonzini
2016-07-09 13:38     ` Borislav Petkov
2016-07-10 11:33       ` Ingo Molnar
2016-07-10 11:38   ` tip-bot for Paolo Bonzini
2016-06-20 14:58 ` [PATCH 3/2] context_tracking: move rcu_virt_note_context_switch out of kvm_host.h Paolo Bonzini
2016-06-20 20:23   ` Rik van Riel
2016-06-20 14:58 ` [PATCH 4/2] KVM: remove kvm_guest_enter/exit wrappers Paolo Bonzini
2016-06-20 20:24   ` Rik van Riel
2016-06-21 13:24 ` [PATCH v2 0/2] x86/entry: speed up context-tracking system calls by 150 clock cycles Christian Borntraeger
2016-06-21 13:26   ` Paolo Bonzini
2016-06-28 12:16 ` Paolo Bonzini
2016-07-06 13:47 ` Paolo Bonzini
  -- strict thread matches above, loose matches on Subject: below --
2016-05-30 12:30 [PATCH " Paolo Bonzini
2016-05-30 12:30 ` [PATCH 2/2] x86/entry: Inline enter_from_user_mode Paolo Bonzini
2016-06-01 14:54   ` Rik van Riel
2016-06-04  5:08   ` Andy Lutomirski
2016-06-06 16:01     ` Paolo Bonzini
2016-06-09 17:17       ` Andy Lutomirski

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