[conntrack-tools PATCH] list: fix prefetch dummy

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From: Arturo Borrero Gonzalez <arturo.borrero.glez@xxxxxxxxx>

[...]
  CC       conntrack.o
In file included from ../include/conntrack.h:4:0,
                 from conntrack.c:41:
conntrack.c: In function ‘findproto’:
../include/linux_list.h:385:59: warning: right-hand operand of comma expression has no effect [-Wunused-value]
  for (pos = list_entry((head)->next, typeof(*pos), member), \
                                                          ^
[...]

The original patch is from Patrick McHardy <kaber@xxxxxxxxx>.

Signed-off-by: Arturo Borrero Gonzalez <arturo.borrero.glez@xxxxxxxxx>
---
 include/linux_list.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux_list.h b/include/linux_list.h
index de182a4..efffb91 100644
--- a/include/linux_list.h
+++ b/include/linux_list.h
@@ -29,7 +29,7 @@
 	1; \
 })
 
-#define prefetch(x)		1
+#define prefetch(x)		((void)0)
 
 /* empty define to make this work in userspace -HW */
 #ifndef smp_wmb

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