From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932449Ab0EMUxQ (ORCPT ); Thu, 13 May 2010 16:53:16 -0400 Received: from e3.ny.us.ibm.com ([32.97.182.143]:50072 "EHLO e3.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758645Ab0EMUxP (ORCPT ); Thu, 13 May 2010 16:53:15 -0400 Date: Thu, 13 May 2010 13:53:07 -0700 From: Matt Helsley To: "Paul E. McKenney" Cc: linux-kernel@vger.kernel.org, mingo@elte.hu, laijs@cn.fujitsu.com, dipankar@in.ibm.com, akpm@linux-foundation.org, mathieu.desnoyers@polymtl.ca, josh@joshtriplett.org, dvhltc@us.ibm.com, niv@us.ibm.com, tglx@linutronix.de, peterz@infradead.org, rostedt@goodmis.org, Valdis.Kletnieks@vt.edu, dhowells@redhat.com, eric.dumazet@gmail.com, Arnd Bergmann , Christopher Li Subject: Re: [PATCH RFC tip/core/rcu 02/23] rcu: add __rcu API for later sparse checking Message-ID: <20100513205307.GS31830@count0.beaverton.ibm.com> References: <20100512213317.GA15085@linux.vnet.ibm.com> <1273700022-16523-2-git-send-email-paulmck@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1273700022-16523-2-git-send-email-paulmck@linux.vnet.ibm.com> User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, May 12, 2010 at 02:33:21PM -0700, Paul E. McKenney wrote: > This commit defines an __rcu API, but provides only vacuous definitions > for it. This breaks dependencies among most of the subsequent patches, > allowing them to reach mainline asynchronously via whatever trees are > appropriate. Seems like a good plan to me. I know it's not the right time to push it but I am curious to see what, approximately, you expect a non-vacuous __rcu definition to look like. (i.e. when it's being run through sparse) Cheers, -Matt Helsley > > Signed-off-by: Arnd Bergmann > Signed-off-by: Paul E. McKenney > Cc: Christopher Li > Cc: Josh Triplett > --- > include/linux/compiler.h | 2 ++ > 1 files changed, 2 insertions(+), 0 deletions(-) > > diff --git a/include/linux/compiler.h b/include/linux/compiler.h > index a5a472b..c1a62c5 100644 > --- a/include/linux/compiler.h > +++ b/include/linux/compiler.h > @@ -16,6 +16,7 @@ > # define __release(x) __context__(x,-1) > # define __cond_lock(x,c) ((c) ? ({ __acquire(x); 1; }) : 0) > # define __percpu __attribute__((noderef, address_space(3))) > +# define __rcu > extern void __chk_user_ptr(const volatile void __user *); > extern void __chk_io_ptr(const volatile void __iomem *); > #else > @@ -34,6 +35,7 @@ extern void __chk_io_ptr(const volatile void __iomem *); > # define __release(x) (void)0 > # define __cond_lock(x,c) (c) > # define __percpu > +# define __rcu > #endif > > #ifdef __KERNEL__ > -- > 1.7.0.6 > > -- > 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/