From: Nathan Chancellor <natechancellor@gmail.com>
To: Eric Anholt <eric@anholt.net>,
Stefan Wahren <stefan.wahren@i2se.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-rpi-kernel@lists.infradead.org,
linux-arm-kernel@lists.infradead.org, devel@driverdev.osuosl.org,
linux-kernel@vger.kernel.org,
Nick Desaulniers <ndesaulniers@google.com>,
Nathan Chancellor <natechancellor@gmail.com>
Subject: [PATCH] staging: bcm2835-camera: Avoid unneeded internal declaration warning
Date: Thu, 27 Sep 2018 17:50:39 -0700 [thread overview]
Message-ID: <20180928005038.1697-1-natechancellor@gmail.com> (raw)
Clang warns:
drivers/staging/vc04_services/bcm2835-camera/controls.c:59:18: warning:
variable 'mains_freq_qmenu' is not needed and will not be emitted
[-Wunneeded-internal-declaration]
static const s64 mains_freq_qmenu[] = {
^
1 warning generated.
This is because mains_freq_qmenu is currently only used in an ARRAY_SIZE
macro, which is a compile time evaluation in this case. Avoid this by
adding mains_freq_qmenu as the imenu member of this structure, which
matches all other controls that uses the ARRAY_SIZE macro in v4l2_ctrls.
This turns out to be a no-op because V4L2_CID_MPEG_VIDEO_BITRATE_MODE is
defined as a MMAL_CONTROL_TYPE_STD_MENU, which does not pass the imenu
definition along to v4l2_ctrl_new in bm2835_mmal_init_controls.
Link: https://github.com/ClangBuiltLinux/linux/issues/122
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
---
drivers/staging/vc04_services/bcm2835-camera/controls.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/staging/vc04_services/bcm2835-camera/controls.c b/drivers/staging/vc04_services/bcm2835-camera/controls.c
index cff7b1e07153..a2c55cb2192a 100644
--- a/drivers/staging/vc04_services/bcm2835-camera/controls.c
+++ b/drivers/staging/vc04_services/bcm2835-camera/controls.c
@@ -1106,7 +1106,7 @@ static const struct bm2835_mmal_v4l2_ctrl v4l2_ctrls[V4L2_CTRL_COUNT] = {
{
V4L2_CID_POWER_LINE_FREQUENCY, MMAL_CONTROL_TYPE_STD_MENU,
0, ARRAY_SIZE(mains_freq_qmenu) - 1,
- 1, 1, NULL,
+ 1, 1, mains_freq_qmenu,
MMAL_PARAMETER_FLICKER_AVOID,
&ctrl_set_flicker_avoidance,
false
--
2.19.0
next reply other threads:[~2018-09-28 0:54 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-28 0:50 Nathan Chancellor [this message]
2018-09-28 9:04 ` [PATCH] staging: bcm2835-camera: Avoid unneeded internal declaration warning Dave Stevenson
2018-09-28 14:48 ` Nathan Chancellor
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