Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752055AbbEKRI1 (ORCPT ); Mon, 11 May 2015 13:08:27 -0400 Received: from relay6-d.mail.gandi.net ([217.70.183.198]:51950 "EHLO relay6-d.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751353AbbEKRI0 (ORCPT ); Mon, 11 May 2015 13:08:26 -0400 X-Originating-IP: 50.43.43.179 Date: Mon, 11 May 2015 10:08:19 -0700 From: Josh Triplett To: Nicholas Mc Guire Cc: "Paul E. McKenney" , Steven Rostedt , Mathieu Desnoyers , Lai Jiangshan , linux-kernel@vger.kernel.org Subject: Re: [PATCH V4] rcu: change function declaration to bool Message-ID: <20150511170819.GA891@x> References: <1431360747-30316-1-git-send-email-hofrat@osadl.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1431360747-30316-1-git-send-email-hofrat@osadl.org> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2013 Lines: 51 On Mon, May 11, 2015 at 06:12:27PM +0200, Nicholas Mc Guire wrote: > rcu_cpu_has_callbacks() is declared int. The current declaration was introduced > in commit c0f4dfd4f90f (rcu: Make RCU_FAST_NO_HZ take advantage of numbered > callbacks). But it is actually returning bool and as the function description > states " * Return true if the specified CPU has any callback....", this probably > should be a bool as all (3) call-sites currently treat it as bool. > > Type-checking coccinelle spatches are being used to locate type mismatches > between function signatures and return values in this case this produced: > ./kernel/rcu/tree.c:3538 WARNING: return of wrong type > int != bool, > > Patch was compile tested with x86_64_defconfig (implies CONFIG_TREE_RCU=y) > > Patch is against 4.1-rc3 (localversion-next is -next-20150511) and fixes > > Signed-off-by: Nicholas Mc Guire Seems like a reasonable addition. Reviewed-by: Josh Triplett > --- > > V4: fix-up to include the origin of the issue being fixed as requeseted by > Steven Rostedt . > > kernel/rcu/tree.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c > index bcc5943..599550c 100644 > --- a/kernel/rcu/tree.c > +++ b/kernel/rcu/tree.c > @@ -3516,7 +3516,7 @@ static int rcu_pending(void) > * non-NULL, store an indication of whether all callbacks are lazy. > * (If there are no callbacks, all of them are deemed to be lazy.) > */ > -static int __maybe_unused rcu_cpu_has_callbacks(bool *all_lazy) > +static bool __maybe_unused rcu_cpu_has_callbacks(bool *all_lazy) > { > bool al = true; > bool hc = false; > -- > 1.7.10.4 > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/