From patchwork Wed Feb 1 19:41:37 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Paul E. McKenney" X-Patchwork-Id: 6546 Return-Path: X-Original-To: patchwork@peony.canonical.com Delivered-To: patchwork@peony.canonical.com Received: from fiordland.canonical.com (fiordland.canonical.com [91.189.94.145]) by peony.canonical.com (Postfix) with ESMTP id 569D423E81 for ; Wed, 1 Feb 2012 19:47:12 +0000 (UTC) Received: from mail-bk0-f52.google.com (mail-bk0-f52.google.com [209.85.214.52]) by fiordland.canonical.com (Postfix) with ESMTP id 44309A1851E for ; Wed, 1 Feb 2012 19:47:12 +0000 (UTC) Received: by mail-bk0-f52.google.com with SMTP id r19so1864140bka.11 for ; Wed, 01 Feb 2012 11:47:12 -0800 (PST) Received: by 10.205.134.129 with SMTP id ic1mr13161146bkc.92.1328125632109; Wed, 01 Feb 2012 11:47:12 -0800 (PST) X-Forwarded-To: linaro-patchwork@canonical.com X-Forwarded-For: patch@linaro.org linaro-patchwork@canonical.com Delivered-To: patches@linaro.org Received: by 10.204.130.220 with SMTP id u28cs220128bks; Wed, 1 Feb 2012 11:47:11 -0800 (PST) Received: by 10.236.192.230 with SMTP id i66mr43110895yhn.116.1328125630968; Wed, 01 Feb 2012 11:47:10 -0800 (PST) Received: from e2.ny.us.ibm.com (e2.ny.us.ibm.com. [32.97.182.142]) by mx.google.com with ESMTPS id g28si4982805yhh.29.2012.02.01.11.47.10 (version=TLSv1/SSLv3 cipher=OTHER); Wed, 01 Feb 2012 11:47:10 -0800 (PST) Received-SPF: pass (google.com: domain of paulmck@linux.vnet.ibm.com designates 32.97.182.142 as permitted sender) client-ip=32.97.182.142; Authentication-Results: mx.google.com; spf=pass (google.com: domain of paulmck@linux.vnet.ibm.com designates 32.97.182.142 as permitted sender) smtp.mail=paulmck@linux.vnet.ibm.com Received: from /spool/local by e2.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 1 Feb 2012 14:47:09 -0500 Received: from d01dlp02.pok.ibm.com (9.56.224.85) by e2.ny.us.ibm.com (192.168.1.102) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; Wed, 1 Feb 2012 14:42:55 -0500 Received: from d01relay03.pok.ibm.com (d01relay03.pok.ibm.com [9.56.227.235]) by d01dlp02.pok.ibm.com (Postfix) with ESMTP id 08D3C6E8114 for ; Wed, 1 Feb 2012 14:42:25 -0500 (EST) Received: from d03av01.boulder.ibm.com (d03av01.boulder.ibm.com [9.17.195.167]) by d01relay03.pok.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id q11JgL01043704 for ; Wed, 1 Feb 2012 14:42:23 -0500 Received: from d03av01.boulder.ibm.com (loopback [127.0.0.1]) by d03av01.boulder.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id q11JgA6q032375 for ; Wed, 1 Feb 2012 12:42:13 -0700 Received: from paulmck-ThinkPad-W500 ([9.47.24.98]) by d03av01.boulder.ibm.com (8.14.4/8.13.1/NCO v10.0 AVin) with ESMTP id q11Jg6iF031650; Wed, 1 Feb 2012 12:42:07 -0700 Received: by paulmck-ThinkPad-W500 (Postfix, from userid 1000) id 8D0DEE5202; Wed, 1 Feb 2012 11:42:03 -0800 (PST) From: "Paul E. McKenney" To: linux-kernel@vger.kernel.org Cc: mingo@elte.hu, laijs@cn.fujitsu.com, dipankar@in.ibm.com, akpm@linux-foundation.org, mathieu.desnoyers@polymtl.ca, josh@joshtriplett.org, niv@us.ibm.com, tglx@linutronix.de, peterz@infradead.org, rostedt@goodmis.org, Valdis.Kletnieks@vt.edu, dhowells@redhat.com, eric.dumazet@gmail.com, darren@dvhart.com, fweisbec@gmail.com, patches@linaro.org, "Paul E. McKenney" Subject: [PATCH RFC tip/core/rcu 19/41] rcu: Streamline code produced by __rcu_read_unlock() Date: Wed, 1 Feb 2012 11:41:37 -0800 Message-Id: <1328125319-5205-19-git-send-email-paulmck@linux.vnet.ibm.com> X-Mailer: git-send-email 1.7.8 In-Reply-To: <1328125319-5205-1-git-send-email-paulmck@linux.vnet.ibm.com> References: <20120201194131.GA10028@linux.vnet.ibm.com> <1328125319-5205-1-git-send-email-paulmck@linux.vnet.ibm.com> X-Content-Scanned: Fidelis XPS MAILER x-cbid: 12020119-5112-0000-0000-0000049E70B2 From: "Paul E. McKenney" This is a port of commit #be0e1e21 to TINY_PREEMPT_RCU. This uses noinline to prevent rcu_read_unlock_special() from being inlined into __rcu_read_unlock(). Signed-off-by: Paul E. McKenney --- kernel/rcutiny_plugin.h | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/kernel/rcutiny_plugin.h b/kernel/rcutiny_plugin.h index 6cba20b..9fbb911 100644 --- a/kernel/rcutiny_plugin.h +++ b/kernel/rcutiny_plugin.h @@ -544,7 +544,7 @@ EXPORT_SYMBOL_GPL(__rcu_read_lock); * notify RCU core processing or task having blocked during the RCU * read-side critical section. */ -static void rcu_read_unlock_special(struct task_struct *t) +static noinline void rcu_read_unlock_special(struct task_struct *t) { int empty; int empty_exp;