usb: storage: Add usb_stor_dbg, reduce object size
Reduce the size of the objects by consolidating
the duplicated USB_STORAGE into a single function.
Add function usb_stor_dbg to emit debugging messages.
Always validate the format and arguments.
Reduce the number of uses of CONFIG_USB_STORAGE_DEBUG.
Reduces size of objects ~7KB when CONFIG_USB_STORAGE_DEBUG
is set.
$ size drivers/usb/storage/built-in.o*
text data bss dec hex filename
140133 55296 70312 265741 40e0d drivers/usb/storage/built-in.o.new
147494 55248 70296 273038 42a8e drivers/usb/storage/built-in.o.old
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/usb/storage/debug.h b/drivers/usb/storage/debug.h
index dbb985d..d4280e1 100644
--- a/drivers/usb/storage/debug.h
+++ b/drivers/usb/storage/debug.h
@@ -50,12 +50,16 @@
void usb_stor_show_command(struct scsi_cmnd *srb);
void usb_stor_show_sense( unsigned char key,
unsigned char asc, unsigned char ascq );
-#define US_DEBUGP(x...) printk( KERN_DEBUG USB_STORAGE x )
-#define US_DEBUGPX(x...) printk( x )
-#define US_DEBUG(x) x
+__printf(1, 2) int usb_stor_dbg(const char *fmt, ...);
+
+#define US_DEBUGP(fmt, ...) usb_stor_dbg(fmt, ##__VA_ARGS__)
+#define US_DEBUGPX(fmt, ...) printk(fmt, ##__VA_ARGS__)
+#define US_DEBUG(x) x
#else
-#define US_DEBUGP(x...)
-#define US_DEBUGPX(x...)
+#define US_DEBUGP(fmt, ...) \
+ do { if (0) printk(fmt, ##__VA_ARGS__); } while (0)
+#define US_DEBUGPX(fmt, ...) \
+ do { if (0) printk(fmt, ##__VA_ARGS__); } while (0)
#define US_DEBUG(x)
#endif