Change in coreboot[master]: libpayload/usb: Add format string checking to usb_debug

[Patrick Georgi (Code Review)]

Patrick Georgi has submitted this change. ( https://review.coreboot.org/c/coreboot/+/45025 )

Change subject: libpayload/usb: Add format string checking to usb_debug
......................................................................

libpayload/usb: Add format string checking to usb_debug

This turns on the compiler's printf style format string checker.

BUG=b:167517417
TEST=enabled all USB controllers on volteer and fixed resulting
    compiler errors when USB_DEBUG is enabled.

Change-Id: Ic94ebcbafdde8a5f79278b5635111b99af40f892
Signed-off-by: Caveh Jalali 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45025
Reviewed-by: Tim Wawrzynczak 
Tested-by: build bot (Jenkins) 
---
M payloads/libpayload/include/usb/usb.h
1 file changed, 1 insertion(+), 1 deletion(-)

Approvals:
  build bot (Jenkins): Verified
  Tim Wawrzynczak: Looks good to me, approved

diff --git a/payloads/libpayload/include/usb/usb.h b/payloads/libpayload/include/usb/usb.h
index f79fc27..43c7b42 100644
--- a/payloads/libpayload/include/usb/usb.h
+++ b/payloads/libpayload/include/usb/usb.h
@@ -334,7 +334,7 @@
 #define USB_QUIRK_TEST				(1 << 31)
 #define USB_QUIRK_NONE				 0

-static inline void usb_debug(const char *fmt, ...)
+static inline void __attribute__((format(printf, 1, 2))) usb_debug(const char *fmt, ...)
 {
 #ifdef USB_DEBUG
    va_list ap;