From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933485AbbFVMYv (ORCPT ); Mon, 22 Jun 2015 08:24:51 -0400 Received: from casper.infradead.org ([85.118.1.10]:48214 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754521AbbFVMYb (ORCPT ); Mon, 22 Jun 2015 08:24:31 -0400 Message-Id: <20150622122256.372509265@infradead.org> User-Agent: quilt/0.61-1 Date: Mon, 22 Jun 2015 14:16:31 +0200 From: Peter Zijlstra To: oleg@redhat.com, paulmck@linux.vnet.ibm.com Cc: tj@kernel.org, mingo@redhat.com, linux-kernel@vger.kernel.org, der.herr@hofr.at, peterz@infradead.org, dave@stgolabs.net, riel@redhat.com, viro@ZenIV.linux.org.uk, torvalds@linux-foundation.org Subject: [RFC][PATCH 08/13] percpu-rwsem: DEFINE_STATIC_PERCPU_RWSEM References: <20150622121623.291363374@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline; filename=peterz-percpu-rwsem-static-init.patch Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Provide a static init Signed-off-by: Peter Zijlstra (Intel) --- include/linux/percpu-rwsem.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) --- a/include/linux/percpu-rwsem.h +++ b/include/linux/percpu-rwsem.h @@ -16,6 +16,19 @@ struct percpu_rw_semaphore { struct rw_semaphore rw_sem; }; +#define DEFINE_STATIC_PERCPU_RWSEM(name) \ +static DEFINE_PER_CPU(unsigned int, __percpu_rwsem_refcount_##name); \ +static struct percpu_rw_semaphore name = { \ + .refcount = &__percpu_rwsem_refcount_##name, \ + .state = 0, \ + .rss = __RCU_SYNC_INITIALIZER(name.rss, RCU_SCHED_SYNC), \ + .writer = __WAIT_QUEUE_HEAD_INITIALIZER(name.writer), \ + .rw_sem = __RWSEM_INITIALIZER(name.rw_sem), \ +} + +#define lockdep_assert_held_percpu_rwsem(sem) \ + lockdep_assert_held(&(sem)->rw_sem) + extern void __percpu_down_read(struct percpu_rw_semaphore *); extern bool __percpu_down_read_trylock(struct percpu_rw_semaphore *); extern void __percpu_up_read(struct percpu_rw_semaphore *); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in Please read the FAQ at http://www.tux.org/lkml/