[media] gspca: avoid unused variable warnings
authorArnd Bergmann <arnd@arndb.de>
Mon, 4 Jul 2016 13:21:40 +0000 (10:21 -0300)
committerMauro Carvalho Chehab <mchehab@s-opensource.com>
Fri, 8 Jul 2016 18:09:39 +0000 (15:09 -0300)
commitd7e92e15e92fc987640772bf110586898b5f15aa
tree716a3a0ebd3d6a98abf54cc89aaf5dfdb00d49a4
parent8ad2d06f6873a13a875b3913462163b7f47a7e34
[media] gspca: avoid unused variable warnings

When CONFIG_INPUT is disabled, multiple gspca backend drivers
print compile-time warnings about unused variables:

media/usb/gspca/cpia1.c: In function 'sd_stopN':
media/usb/gspca/cpia1.c:1627:13: error: unused variable 'sd' [-Werror=unused-variable]
media/usb/gspca/konica.c: In function 'sd_stopN':
media/usb/gspca/konica.c:246:13: error: unused variable 'sd' [-Werror=unused-variable]

This annotates the variables as __maybe_unused, to let the compiler
know that they are declared intentionally.

Fixes: ee186fd96a5f ("[media] gscpa_t613: Add support for the camera button")
Fixes: c2f644aeeba3 ("[media] gspca_cpia1: Add support for button")
Fixes: b517af722860 ("V4L/DVB: gspca_konica: New gspca subdriver for konica chipset using cams")

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
drivers/media/usb/gspca/cpia1.c
drivers/media/usb/gspca/konica.c
drivers/media/usb/gspca/t613.c