From d7e92e15e92fc987640772bf110586898b5f15aa Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Mon, 4 Jul 2016 10:21:40 -0300 Subject: [PATCH] [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 Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/media/usb/gspca/cpia1.c | 2 +- drivers/media/usb/gspca/konica.c | 2 +- drivers/media/usb/gspca/t613.c | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/media/usb/gspca/cpia1.c b/drivers/media/usb/gspca/cpia1.c index f23df4a..52b88e9 100644 --- a/drivers/media/usb/gspca/cpia1.c +++ b/drivers/media/usb/gspca/cpia1.c @@ -1624,7 +1624,7 @@ static int sd_start(struct gspca_dev *gspca_dev) static void sd_stopN(struct gspca_dev *gspca_dev) { - struct sd *sd = (struct sd *) gspca_dev; + struct sd *sd __maybe_unused = (struct sd *) gspca_dev; command_pause(gspca_dev); diff --git a/drivers/media/usb/gspca/konica.c b/drivers/media/usb/gspca/konica.c index 39c96bb..0712b1b 100644 --- a/drivers/media/usb/gspca/konica.c +++ b/drivers/media/usb/gspca/konica.c @@ -243,7 +243,7 @@ static int sd_start(struct gspca_dev *gspca_dev) static void sd_stopN(struct gspca_dev *gspca_dev) { - struct sd *sd = (struct sd *) gspca_dev; + struct sd *sd __maybe_unused = (struct sd *) gspca_dev; konica_stream_off(gspca_dev); #if IS_ENABLED(CONFIG_INPUT) diff --git a/drivers/media/usb/gspca/t613.c b/drivers/media/usb/gspca/t613.c index e2cc4e5..bb52fc1 100644 --- a/drivers/media/usb/gspca/t613.c +++ b/drivers/media/usb/gspca/t613.c @@ -837,7 +837,7 @@ static void sd_pkt_scan(struct gspca_dev *gspca_dev, u8 *data, /* isoc packet */ int len) /* iso packet length */ { - struct sd *sd = (struct sd *) gspca_dev; + struct sd *sd __maybe_unused = (struct sd *) gspca_dev; int pkt_type; if (data[0] == 0x5a) { -- 2.7.4