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 <[email protected]>
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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