[PATCH 2.4.31 9/9] gcc4: fix i386 struct_cpy() warnings

[Mikael Pettersson]

On i386 gcc4 generates a few compile-time warnings like:

process.c:556: warning: statement with no effect
process.c:569: warning: statement with no effect

This is because the i386 struct_cpy() macro references an
undefined variable when its two operands differ in size,
in the hope of turning a runtime error into a link-time error.

However, a simple variable reference has no effect, which
is why gcc4 complains.

The fix is to change it to a call to an undefined function.

Signed-off-by: Mikael Pettersson <mikpe@xxxxxxxxx>

 include/asm-i386/string.h |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)

diff -rupN linux-2.4.31/include/asm-i386/string.h linux-2.4.31.gcc4-i386-struct_cpy-warnings/include/asm-i386/string.h
--- linux-2.4.31/include/asm-i386/string.h	2001-08-12 11:35:53.000000000 +0200
+++ linux-2.4.31.gcc4-i386-struct_cpy-warnings/include/asm-i386/string.h	2005-06-12 11:52:25.000000000 +0200
@@ -337,7 +337,7 @@ extern void __struct_cpy_bug (void);
 #define struct_cpy(x,y) 			\
 ({						\
 	if (sizeof(*(x)) != sizeof(*(y))) 	\
-		__struct_cpy_bug;		\
+		__struct_cpy_bug();		\
 	memcpy(x, y, sizeof(*(x)));		\
 })
 
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