Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753767Ab3IZQ0Y (ORCPT ); Thu, 26 Sep 2013 12:26:24 -0400 Received: from mail-we0-f178.google.com ([74.125.82.178]:39460 "EHLO mail-we0-f178.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753102Ab3IZQZA (ORCPT ); Thu, 26 Sep 2013 12:25:00 -0400 From: Frederic Weisbecker To: LKML Cc: Frederic Weisbecker , Benjamin Herrenschmidt , Paul Mackerras , Ingo Molnar , Thomas Gleixner , Peter Zijlstra , "H. Peter Anvin" , Linus Torvalds , James Hogan , "James E.J. Bottomley" , Helge Deller , Martin Schwidefsky , Heiko Carstens , "David S. Miller" , Andrew Morton Subject: [PATCH 3/8] irq: Optimize call to softirq on hardirq exit Date: Thu, 26 Sep 2013 18:24:41 +0200 Message-Id: <1380212686-25897-4-git-send-email-fweisbec@gmail.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1380212686-25897-1-git-send-email-fweisbec@gmail.com> References: <1380212686-25897-1-git-send-email-fweisbec@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1631 Lines: 48 Before processing softirqs on hardirq exit, we already do the check for pending softirqs while hardirqs are guaranteed to be disabled. So we can take a shortcut and safely jump to the arch specific implementation directly. Signed-off-by: Frederic Weisbecker Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Cc: Ingo Molnar Cc: Thomas Gleixner Cc: Peter Zijlstra Cc: H. Peter Anvin Cc: Linus Torvalds Cc: Paul Mackerras Cc: James Hogan Cc: James E.J. Bottomley Cc: Helge Deller Cc: Martin Schwidefsky Cc: Heiko Carstens Cc: David S. Miller Cc: Andrew Morton --- kernel/softirq.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/softirq.c b/kernel/softirq.c index 26ee727..17c5cd2 100644 --- a/kernel/softirq.c +++ b/kernel/softirq.c @@ -335,7 +335,7 @@ static inline void invoke_softirq(void) * in its own stack to prevent from any overrun on top * of a potentially deep task stack. */ - do_softirq(); + do_softirq_own_stack(); } else { wakeup_softirqd(); } -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/