linux-kernel - [PATCH V2] rcu: change function declaration to bool

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Message-Id: <1431357059-29795-1-git-send-email-hofrat@osadl.org>
Date:	Mon, 11 May 2015 17:10:59 +0200
From:	Nicholas Mc Guire <hofrat@...dl.org>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:	Josh Triplett <josh@...htriplett.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Lai Jiangshan <laijs@...fujitsu.com>,
	linux-kernel@...r.kernel.org, Nicholas Mc Guire <hofrat@...dl.org>
Subject: [PATCH V2] rcu: change function declaration to bool

rcu_cpu_has_callbacks() is declared int but is actually returning bool and
and as the function description states " * Return true if the specified 
CPU has any callback....", this probably should be a bool. All (3) 
call-sites currently treat it as bool so the declaration.


Signed-off-by: Nicholas Mc Guire <hofrat@...dl.org>
---

V2: fixed up commit message and tool infos as requested by 
    Josh Triplett <josh@...htriplett.org>

Type-checking coccinelle spatches are being used to locate type 
mismatches between function signatures and return values. 
./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)

 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

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