ieee1394: safer definition of empty macros
A deactivated macro, defined as "#define foo(bar)", will result in
silent corruption if somebody forgets a semicolon after a call to foo.
Replace it by "#define foo(bar) do {} while (0)" which will reveal any
respective syntax errors.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
diff --git a/drivers/ieee1394/dv1394.c b/drivers/ieee1394/dv1394.c
index 6e71d68..6c72f04 100644
--- a/drivers/ieee1394/dv1394.c
+++ b/drivers/ieee1394/dv1394.c
@@ -137,13 +137,13 @@
#if DV1394_DEBUG_LEVEL >= 2
#define irq_printk( args... ) printk( args )
#else
-#define irq_printk( args... )
+#define irq_printk( args... ) do {} while (0)
#endif
#if DV1394_DEBUG_LEVEL >= 1
#define debug_printk( args... ) printk( args)
#else
-#define debug_printk( args... )
+#define debug_printk( args... ) do {} while (0)
#endif
/* issue a dummy PCI read to force the preceding write