linux-kernel - [PATCH 2/2] rcu: fix sparse shadowed variable warning

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Message-Id: <1219780844.6069.6.camel@brick>
Date:	Tue, 26 Aug 2008 13:00:44 -0700
From:	Harvey Harrison <harvey.harrison@...il.com>
To:	"Paul E. McKenney" <paulmck@...ibm.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH 2/2] rcu: fix sparse shadowed variable warning

kernel/rcuclassic.c:564:18: warning: symbol 'flags' shadows an earlier one
kernel/rcuclassic.c:527:16: originally declared here

Signed-off-by: Harvey Harrison <harvey.harrison@...il.com>
---
It would be safe in this case to just remove the second declaration of flags
and reuse it as it is outside the local_irq_save/restore pair.  I did it this
way in case there are future changes that might mix up the use of flags.

Feel free to just remove the second flags declaration if you'd rather do it
that way.

 kernel/rcuclassic.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/kernel/rcuclassic.c b/kernel/rcuclassic.c
index 743cf05..ed15128 100644
--- a/kernel/rcuclassic.c
+++ b/kernel/rcuclassic.c
@@ -561,15 +561,15 @@ static void __rcu_process_callbacks(struct rcu_ctrlblk *rcp,
 		local_irq_restore(flags);
 
 		if (rcu_batch_after(rdp->batch, rcp->pending)) {
-			unsigned long flags;
+			unsigned long flags2;
 
 			/* and start it/schedule start if it's a new batch */
-			spin_lock_irqsave(&rcp->lock, flags);
+			spin_lock_irqsave(&rcp->lock, flags2);
 			if (rcu_batch_after(rdp->batch, rcp->pending)) {
 				rcp->pending = rdp->batch;
 				rcu_start_batch(rcp);
 			}
-			spin_unlock_irqrestore(&rcp->lock, flags);
+			spin_unlock_irqrestore(&rcp->lock, flags2);
 		}
 	}
 
-- 
1.6.0.340.g84854

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