From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S935345AbcIETnI (ORCPT ); Mon, 5 Sep 2016 15:43:08 -0400 Received: from merlin.infradead.org ([205.233.59.134]:60656 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755285AbcIETmL (ORCPT ); Mon, 5 Sep 2016 15:42:11 -0400 Message-Id: <20160905194127.067650898@infradead.org> User-Agent: quilt/0.61-1 Date: Mon, 05 Sep 2016 21:40:55 +0200 From: Peter Zijlstra To: oleg@redhat.com, paulmck@linux.vnet.ibm.com, 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, wagi@monom.org Subject: [PATCH 1/7] percpu-rwsem: DEFINE_STATIC_PERCPU_RWSEM References: <20160905194054.369038779@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline; filename=peter_zijlstra-percpu-rwsem-define_static_percpu_rwsem.patch Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Provide a static init. Cc: der.herr@hofr.at Cc: viro@ZenIV.linux.org.uk Cc: mingo@redhat.com Cc: torvalds@linux-foundation.org Cc: dave@stgolabs.net Cc: oleg@redhat.com Cc: riel@redhat.com Cc: tj@kernel.org Cc: paulmck@linux.vnet.ibm.com Signed-off-by: Peter Zijlstra (Intel) --- include/linux/percpu-rwsem.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) --- a/include/linux/percpu-rwsem.h +++ b/include/linux/percpu-rwsem.h @@ -16,6 +16,15 @@ struct percpu_rw_semaphore { int readers_block; }; +#define DEFINE_STATIC_PERCPU_RWSEM(name) \ +static DEFINE_PER_CPU(unsigned int, __percpu_rwsem_rc_##name); \ +static struct percpu_rw_semaphore name = { \ + .rss = __RCU_SYNC_INITIALIZER(name.rss, RCU_SCHED_SYNC), \ + .read_count = &__percpu_rwsem_rc_##name, \ + .rw_sem = __RWSEM_INITIALIZER(name.rw_sem), \ + .writer = __WAIT_QUEUE_HEAD_INITIALIZER(name.writer), \ +} + extern int __percpu_down_read(struct percpu_rw_semaphore *, int); extern void __percpu_up_read(struct percpu_rw_semaphore *); @@ -102,6 +111,9 @@ extern void percpu_free_rwsem(struct per #define percpu_rwsem_is_held(sem) lockdep_is_held(&(sem)->rw_sem) +#define percpu_rwsem_assert_held(sem) \ + lockdep_assert_held(&(sem)->rw_sem) + static inline void percpu_rwsem_release(struct percpu_rw_semaphore *sem, bool read, unsigned long ip) {