From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:52865) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bcgV3-0006eJ-VO for qemu-devel@nongnu.org; Wed, 24 Aug 2016 18:18:23 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bcgUy-0004Jp-UH for qemu-devel@nongnu.org; Wed, 24 Aug 2016 18:18:20 -0400 Received: from out2-smtp.messagingengine.com ([66.111.4.26]:45058) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bcgUw-0004FD-5O for qemu-devel@nongnu.org; Wed, 24 Aug 2016 18:18:16 -0400 From: "Emilio G. Cota" Date: Wed, 24 Aug 2016 18:17:58 -0400 Message-Id: <1472077083-15022-3-git-send-email-cota@braap.org> In-Reply-To: <1472077083-15022-1-git-send-email-cota@braap.org> References: <20160824211240.GA26546@flamenco> <1472077083-15022-1-git-send-email-cota@braap.org> Subject: [Qemu-devel] [PATCH 3/8] rcu: add rcu_read_lock_held() List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Richard Henderson Cc: alex.bennee@linaro.org, mttcg@greensocs.com, qemu-devel@nongnu.org, fred.konrad@greensocs.com, a.rigo@virtualopensystems.com, bobby.prani@gmail.com, nikunj@linux.vnet.ibm.com, mark.burton@greensocs.com, pbonzini@redhat.com, jan.kiszka@siemens.com, serge.fdrv@gmail.com, peter.maydell@linaro.org, claudio.fontana@huawei.com, dgilbert@redhat.com, crosthwaite.peter@gmail.com Signed-off-by: Emilio G. Cota --- include/qemu/rcu.h | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/include/qemu/rcu.h b/include/qemu/rcu.h index 83ae280..0f6e467 100644 --- a/include/qemu/rcu.h +++ b/include/qemu/rcu.h @@ -98,6 +98,13 @@ static inline void rcu_read_unlock(void) } } +static inline bool rcu_read_lock_held(void) +{ + struct rcu_reader_data *p_rcu_reader = &rcu_reader; + + return p_rcu_reader->depth > 0; +} + extern void synchronize_rcu(void); /* -- 2.5.0