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authorEric Dumazet <eric.dumazet@gmail.com>2009-10-01 07:30:38 +0200
committerIngo Molnar <mingo@elte.hu>2009-10-01 08:42:24 +0200
commit04edbdef02ec4386a2ae38cab7ae7d166e17a756 (patch)
tree4814b5f91000bcd730b0c21e072835b10b1ab641 /arch/x86/kernel
parentd1716a60a8ea90788d24aa22d7eec83fbdd2d88a (diff)
x86: Don't generate cmpxchg8b_emu if CONFIG_X86_CMPXCHG64=y
Conditionaly compile cmpxchg8b_emu.o and EXPORT_SYMBOL(cmpxchg8b_emu). This reduces the kernel size a bit. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Cc: Arjan van de Ven <arjan@infradead.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: John Stultz <johnstul@us.ibm.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Linus Torvalds <torvalds@linux-foundation.org> LKML-Reference: <4AC43E7E.1000600@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel')
-rw-r--r--arch/x86/kernel/i386_ksyms_32.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/kernel/i386_ksyms_32.c b/arch/x86/kernel/i386_ksyms_32.c
index 1736c5a725a..9c3bd4a2050 100644
--- a/arch/x86/kernel/i386_ksyms_32.c
+++ b/arch/x86/kernel/i386_ksyms_32.c
@@ -15,8 +15,10 @@ EXPORT_SYMBOL(mcount);
* the export, but dont use it from C code, it is used
* by assembly code and is not using C calling convention!
*/
+#ifndef CONFIG_X86_CMPXCHG64
extern void cmpxchg8b_emu(void);
EXPORT_SYMBOL(cmpxchg8b_emu);
+#endif
/* Networking helper routines. */
EXPORT_SYMBOL(csum_partial_copy_generic);