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usb: storage: Add usb_stor_dbg, reduce object size

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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>
This commit is contained in:
Joe Perches
2013-04-16 22:44:07 -07:00
committed by Greg Kroah-Hartman
parent 61ac6ac8d6
commit 75b9130e8a
3 changed files with 34 additions and 12 deletions
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14
drivers/usb/storage/debug.h
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@@ -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