linux-kernel - [PATCH percpu#for-next] ia64: add sparse annotation to __ia64_per_cpu

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Date:	Thu, 29 Oct 2009 15:03:31 +0100
From:	Tejun Heo <tj@...nel.org>
To:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"'linux-ia64@...r.kernel.org'" <linux-ia64@...r.kernel.org>,
	"Luck, Tony" <tony.luck@...el.com>,
	Christoph Lameter <cl@...ux-foundation.org>
Subject: [PATCH percpu#for-next] ia64: add sparse annotation to __ia64_per_cpu_var()

ia64 has its own optimized percpu accessor - __ia64_per_cpu_var().
Add percpu sparse annotations to it.

Signed-off-by: Tejun Heo <tj@...nel.org>
---
 arch/ia64/include/asm/percpu.h |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

Index: work/arch/ia64/include/asm/percpu.h
===================================================================
--- work.orig/arch/ia64/include/asm/percpu.h
+++ work/arch/ia64/include/asm/percpu.h
@@ -39,7 +39,10 @@ extern void *per_cpu_init(void);
  * On the positive side, using __ia64_per_cpu_var() instead of __get_cpu_var() is slightly
  * more efficient.
  */
-#define __ia64_per_cpu_var(var)	var
+#define __ia64_per_cpu_var(var) (*({					\
+	__verify_pcpu_ptr(&(var));					\
+	((typeof(var) __kernel __force *)&(var));			\
+}))
 
 #include <asm-generic/percpu.h>
 
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