[Xen-changelog] Fix Xen to build with gcc-4.1.

[Xen patchbot -unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User kaf24@xxxxxxxxxxxxxxxxxxxx
# Node ID 14d733e5e1d014e302d72fb78df1428ee08e3ce3
# Parent  6cc603ac3f38f8f4b760899e963ef8165ae0c8ee
Fix Xen to build with gcc-4.1.

Signed-off-by: Vincent Hanquez <vincent@xxxxxxxxxxxxx>

diff -r 6cc603ac3f38 -r 14d733e5e1d0 xen/include/asm-x86/apic.h
--- a/xen/include/asm-x86/apic.h        Wed Nov 23 13:14:01 2005
+++ b/xen/include/asm-x86/apic.h        Wed Nov 23 13:15:35 2005
@@ -43,7 +43,7 @@
 
 static __inline void apic_write_atomic(unsigned long reg, u32 v)
 {
-       xchg((volatile u32 *)(APIC_BASE+reg), v);
+       (void)xchg((volatile u32 *)(APIC_BASE+reg), v);
 }
 
 static __inline u32 apic_read(unsigned long reg)

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