linux-kernel - [PATCH RFC tip/core/rcu 02/23] rcu: add _

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Message-Id: <1273700022-16523-2-git-send-email-paulmck@linux.vnet.ibm.com>
Date:	Wed, 12 May 2010 14:33:21 -0700
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	linux-kernel@...r.kernel.org
Cc:	mingo@...e.hu, laijs@...fujitsu.com, dipankar@...ibm.com,
	akpm@...ux-foundation.org, mathieu.desnoyers@...ymtl.ca,
	josh@...htriplett.org, dvhltc@...ibm.com, niv@...ibm.com,
	tglx@...utronix.de, peterz@...radead.org, rostedt@...dmis.org,
	Valdis.Kletnieks@...edu, dhowells@...hat.com,
	eric.dumazet@...il.com,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Arnd Bergmann <arnd@...db.de>,
	Christopher Li <sparse@...isli.org>
Subject: [PATCH RFC tip/core/rcu 02/23] rcu: add __rcu API for later sparse checking

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.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
Cc: Christopher Li <sparse@...isli.org>
Cc: Josh Triplett <josh@...htriplett.org>
---
 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

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