From patchwork Tue Jan 22 07:33:42 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Srivatsa S. Bhat" X-Patchwork-Id: 2015641 Return-Path: X-Original-To: patchwork-linux-pm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork1.kernel.org (Postfix) with ESMTP id E35B73FCDE for ; Tue, 22 Jan 2013 07:36:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753989Ab3AVHfm (ORCPT ); Tue, 22 Jan 2013 02:35:42 -0500 Received: from e28smtp01.in.ibm.com ([122.248.162.1]:51293 "EHLO e28smtp01.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753802Ab3AVHfi (ORCPT ); Tue, 22 Jan 2013 02:35:38 -0500 Received: from /spool/local by e28smtp01.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 22 Jan 2013 13:03:49 +0530 Received: from d28dlp02.in.ibm.com (9.184.220.127) by e28smtp01.in.ibm.com (192.168.1.131) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; Tue, 22 Jan 2013 13:03:45 +0530 Received: from d28relay03.in.ibm.com (d28relay03.in.ibm.com [9.184.220.60]) by d28dlp02.in.ibm.com (Postfix) with ESMTP id 224AB3940058; Tue, 22 Jan 2013 13:05:32 +0530 (IST) Received: from d28av03.in.ibm.com (d28av03.in.ibm.com [9.184.220.65]) by d28relay03.in.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id r0M7ZTjh44040336; Tue, 22 Jan 2013 13:05:29 +0530 Received: from d28av03.in.ibm.com (loopback [127.0.0.1]) by d28av03.in.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id r0M7ZRvs018992; Tue, 22 Jan 2013 18:35:31 +1100 Received: from srivatsabhat.in.ibm.com (srivatsabhat.in.ibm.com [9.124.35.112]) by d28av03.in.ibm.com (8.14.4/8.13.1/NCO v10.0 AVin) with ESMTP id r0M7ZQmH018954; Tue, 22 Jan 2013 18:35:26 +1100 From: "Srivatsa S. Bhat" Subject: [PATCH v5 03/45] percpu_rwlock: Provide a way to define and init percpu-rwlocks at compile time To: tglx@linutronix.de, peterz@infradead.org, tj@kernel.org, oleg@redhat.com, paulmck@linux.vnet.ibm.com, rusty@rustcorp.com.au, mingo@kernel.org, akpm@linux-foundation.org, namhyung@kernel.org Cc: rostedt@goodmis.org, wangyun@linux.vnet.ibm.com, xiaoguangrong@linux.vnet.ibm.com, rjw@sisk.pl, sbw@mit.edu, fweisbec@gmail.com, linux@arm.linux.org.uk, nikunj@linux.vnet.ibm.com, srivatsa.bhat@linux.vnet.ibm.com, linux-pm@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, netdev@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Date: Tue, 22 Jan 2013 13:03:42 +0530 Message-ID: <20130122073338.13822.94829.stgit@srivatsabhat.in.ibm.com> In-Reply-To: <20130122073210.13822.50434.stgit@srivatsabhat.in.ibm.com> References: <20130122073210.13822.50434.stgit@srivatsabhat.in.ibm.com> User-Agent: StGIT/0.14.3 MIME-Version: 1.0 X-Content-Scanned: Fidelis XPS MAILER x-cbid: 13012207-4790-0000-0000-0000069401A6 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Add the support for defining and initializing percpu-rwlocks at compile time for those users who would like to use percpu-rwlocks really early in the boot process (even before dynamic per-CPU allocations can begin). Cc: David Howells Signed-off-by: Srivatsa S. Bhat --- include/linux/percpu-rwlock.h | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) -- To unsubscribe from this list: send the line "unsubscribe linux-pm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/include/linux/percpu-rwlock.h b/include/linux/percpu-rwlock.h index cd5eab5..8dec8fe 100644 --- a/include/linux/percpu-rwlock.h +++ b/include/linux/percpu-rwlock.h @@ -45,6 +45,24 @@ extern int __percpu_init_rwlock(struct percpu_rwlock *, extern void percpu_free_rwlock(struct percpu_rwlock *); + +#define __PERCPU_RWLOCK_INIT(name) \ + { \ + .reader_refcnt = &name##_reader_refcnt, \ + .writer_signal = &name##_writer_signal, \ + .global_rwlock = __RW_LOCK_UNLOCKED(name.global_rwlock) \ + } + +#define DEFINE_PERCPU_RWLOCK(name) \ + static DEFINE_PER_CPU(unsigned long, name##_reader_refcnt); \ + static DEFINE_PER_CPU(bool, name##_writer_signal); \ + struct percpu_rwlock (name) = __PERCPU_RWLOCK_INIT(name); + +#define DEFINE_STATIC_PERCPU_RWLOCK(name) \ + static DEFINE_PER_CPU(unsigned long, name##_reader_refcnt); \ + static DEFINE_PER_CPU(bool, name##_writer_signal); \ + static struct percpu_rwlock(name) = __PERCPU_RWLOCK_INIT(name); + #define percpu_init_rwlock(pcpu_rwlock) \ ({ static struct lock_class_key rwlock_key; \ __percpu_init_rwlock(pcpu_rwlock, #pcpu_rwlock, &rwlock_key); \