From: Jeff Garzik Debug code in mos7840 emits the following warnings on 64-bit: drivers/usb/serial/mos7840.c: In function ‘mos7840_open’: drivers/usb/serial/mos7840.c:1091: warning: cast from pointer to integer of different size drivers/usb/serial/mos7840.c:1091: warning: cast from pointer to integer of different size drivers/usb/serial/mos7840.c:1091: warning: cast from pointer to integer of different size Solution: Don't assume pointers are 32-bit. The easy solution actually cleans up the code: "%p" (pointer) permits us to eliminate the casts, and print correct debug information on 64-bit. Signed-off-by: Jeff Garzik Cc: Greg KH Cc: Paul B Schroeder Signed-off-by: Andrew Morton --- drivers/usb/serial/mos7840.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff -puN drivers/usb/serial/mos7840.c~usb-serial-mos7840-fix-cast drivers/usb/serial/mos7840.c --- a/drivers/usb/serial/mos7840.c~usb-serial-mos7840-fix-cast +++ a/drivers/usb/serial/mos7840.c @@ -1088,7 +1088,7 @@ static int mos7840_open(struct usb_seria mos7840_port->icount.tx = 0; mos7840_port->icount.rx = 0; - dbg("\n\nusb_serial serial:%x mos7840_port:%x\n usb_serial_port port:%x\n\n", (unsigned int)serial, (unsigned int)mos7840_port, (unsigned int)port); + dbg("\n\nusb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p\n\n", serial, mos7840_port, port); return 0; _