linux-kernel - [PATCH percpu#for-next] percpu: remove compile warnings caused by __verify_pcpu

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Message-ID: <4B03B8E5.7000706@kernel.org>
Date:	Wed, 18 Nov 2009 18:05:41 +0900
From:	Tejun Heo <tj@...nel.org>
To:	Stephen Rothwell <sfr@...b.auug.org.au>
CC:	Rusty Russell <rusty@...tcorp.com.au>,
	Christoph Lameter <cl@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>, linux-next@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH percpu#for-next] percpu: remove compile warnings caused by
 __verify_pcpu_ptr()

If percpu pointer is const, __verify_pcpu_ptr() triggers warnings like
the following.

 drivers/net/loopback.c: In function 'loopback_get_stats':
 drivers/net/loopback.c:109: warning: initialization discards qualifiers from pointer target type

Fix it by adding const to the verification target pointer used in
__verify_pcpu_ptr().

Signed-off-by: Tejun Heo <tj@...nel.org>
Reported-by: Stephen Rothwell <sfr@...b.auug.org.au>
---
Sorry about the delay.  Patch committed to percpu#for-next.

Thanks.

 include/linux/percpu-defs.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/include/linux/percpu-defs.h b/include/linux/percpu-defs.h
index 1fa36eb..68567c0 100644
--- a/include/linux/percpu-defs.h
+++ b/include/linux/percpu-defs.h
@@ -24,7 +24,7 @@
  * input parameter is a percpu pointer.
  */
 #define __verify_pcpu_ptr(ptr)	do {					\
-	void __percpu *__vpp_verify = (typeof(ptr))NULL;		\
+	const void __percpu *__vpp_verify = (typeof(ptr))NULL;		\
 	(void)__vpp_verify;						\
 } while (0)

-- 
1.6.4.2

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