linux-kernel - [PATCH] percpu: add missing per_cpu_ptr_to

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Message-ID: <4B15A9EA.3090108@kernel.org>
Date:	Wed, 02 Dec 2009 08:42:34 +0900
From:	Tejun Heo <tj@...nel.org>
To:	Randy Dunlap <randy.dunlap@...cle.com>
CC:	LKML <linux-kernel@...r.kernel.org>, linux-next@...r.kernel.org,
	Vivek Goyal <vgoyal@...hat.com>
Subject: [PATCH] percpu: add missing per_cpu_ptr_to_phys() definition for
 UP

Commit 3b034b0d084221596bf35c8d893e1d4d5477b9cc implemented
per_cpu_ptr_to_phys() but forgot to add UP definition.  Add UP
definition which is simple wrapper around __pa().

Signed-off-by: Tejun Heo <tj@...nel.org>
Cc: Vivek Goyal <vgoyal@...hat.com>
Reported-by: Randy Dunlap <randy.dunlap@...cle.com>
---
Hello,

> drivers/base/cpu.c: line 100: fails to build when CONFIG_SMP=n:
> 
> 	addr = per_cpu_ptr_to_phys(per_cpu_ptr(crash_notes, cpunum));
> 
> Can you suggest a fix for that, please?

Oops, right, UP definition was missing.  This patch should do it.

Thanks.

 include/linux/percpu.h |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/include/linux/percpu.h b/include/linux/percpu.h
index 6ac984f..8e4ead6 100644
--- a/include/linux/percpu.h
+++ b/include/linux/percpu.h
@@ -180,6 +180,11 @@ static inline void free_percpu(void *p)
 	kfree(p);
 }
 
+static inline phys_addr_t per_cpu_ptr_to_phys(void *addr)
+{
+	return __pa(addr);
+}
+
 static inline void __init setup_per_cpu_areas(void) { }
 
 static inline void *pcpu_lpage_remapped(void *kaddr)
-- 
1.6.4.2

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