From: Stephen Rothwell <sfr@canb.auug.org.au>
Date: Tue, 29 Jul 2008 06:07:37 +0000 (+1000)
Subject: cpumask: statement expressions confuse some versions of gcc
X-Git-Tag: v2.6.27-rc2~118
X-Git-Url: http://www.pilppa.org/gitweb/gitweb.cgi?a=commitdiff_plain;h=3dd730f2b49f101b90d283c3efc4e6cd826dd8f6;p=linux-2.6-omap-h63xx.git

cpumask: statement expressions confuse some versions of gcc

when you take the address of the result.  Noticed on a sparc64 compile
using a version 3.4.5 cross compiler.

 kernel/time/tick-common.c: In function `tick_check_new_device':
 kernel/time/tick-common.c:210: error: invalid lvalue in unary `&'
 ...

Just make it a regular expression.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h
index 96d0509fb8d..d3219d73f8e 100644
--- a/include/linux/cpumask.h
+++ b/include/linux/cpumask.h
@@ -287,7 +287,7 @@ static inline const cpumask_t *get_cpu_mask(unsigned int cpu)
  * gcc optimizes it out (it's a constant) and there's no huge stack
  * variable created:
  */
-#define cpumask_of_cpu(cpu) ({ *get_cpu_mask(cpu); })
+#define cpumask_of_cpu(cpu) (*get_cpu_mask(cpu))
 
 
 #define CPU_MASK_LAST_WORD BITMAP_LAST_WORD_MASK(NR_CPUS)