Re: [Outreachy kernel] [PATCH] Staging: media: imx: Prefer using BIT macro

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Fri, Sep 8, 2017 at 11:11 AM, Srishti Sharma <srishtishar@xxxxxxxxx> wrote:
> Use BIT(x) instead of (1<<x).
>
> Signed-off-by: Srishti Sharma <srishtishar@xxxxxxxxx>
> ---
>  drivers/staging/media/imx/imx-media.h | 16 ++++++++--------
>  1 file changed, 8 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/staging/media/imx/imx-media.h b/drivers/staging/media/imx/imx-media.h
> index d409170..e5b8d29 100644
> --- a/drivers/staging/media/imx/imx-media.h
> +++ b/drivers/staging/media/imx/imx-media.h
> @@ -310,16 +310,16 @@ void imx_media_capture_device_set_format(struct imx_media_video_dev *vdev,
>  void imx_media_capture_device_error(struct imx_media_video_dev *vdev);
>
>  /* subdev group ids */
> -#define IMX_MEDIA_GRP_ID_SENSOR    (1 << 8)
> -#define IMX_MEDIA_GRP_ID_VIDMUX    (1 << 9)
> -#define IMX_MEDIA_GRP_ID_CSI2      (1 << 10)
> +#define IMX_MEDIA_GRP_ID_SENSOR    BIT(8)
> +#define IMX_MEDIA_GRP_ID_VIDMUX    BIT(9)
> +#define IMX_MEDIA_GRP_ID_CSI2      BIT(10)
>  #define IMX_MEDIA_GRP_ID_CSI_BIT   11
>  #define IMX_MEDIA_GRP_ID_CSI       (0x3 << IMX_MEDIA_GRP_ID_CSI_BIT)
> -#define IMX_MEDIA_GRP_ID_CSI0      (1 << IMX_MEDIA_GRP_ID_CSI_BIT)
> +#define IMX_MEDIA_GRP_ID_CSI0      BIT(IMX_MEDIA_GRP_ID_CSI_BIT)
>  #define IMX_MEDIA_GRP_ID_CSI1      (2 << IMX_MEDIA_GRP_ID_CSI_BIT)
> -#define IMX_MEDIA_GRP_ID_VDIC      (1 << 13)
> -#define IMX_MEDIA_GRP_ID_IC_PRP    (1 << 14)
> -#define IMX_MEDIA_GRP_ID_IC_PRPENC (1 << 15)
> -#define IMX_MEDIA_GRP_ID_IC_PRPVF  (1 << 16)
> +#define IMX_MEDIA_GRP_ID_VDIC      BIT(13)
> +#define IMX_MEDIA_GRP_ID_IC_PRP    BIT(14)
> +#define IMX_MEDIA_GRP_ID_IC_PRPENC BIT(15)
> +#define IMX_MEDIA_GRP_ID_IC_PRPVF  BIT(16)

Hi Srishti,
Thanks for your patch.

Perhaps this is just personal preference, but I find the previous
version more readable. Since IMX_MEDIA_GRP_ID_CSI and
IMX_MEDIA_GRP_ID_CSI1 are multi-bit fields, you can't fully eliminate
the bit shift operations, so you end up with a mix, which is kind of
ugly.

Sean

>
>  #endif
> --
> 2.7.4
>
> --
> You received this message because you are subscribed to the Google Groups "outreachy-kernel" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to outreachy-kernel+unsubscribe@xxxxxxxxxxxxxxxx.
> To post to this group, send email to outreachy-kernel@xxxxxxxxxxxxxxxx.
> To view this discussion on the web visit https://groups.google.com/d/msgid/outreachy-kernel/1504883469-8127-1-git-send-email-srishtishar%40gmail.com.
> For more options, visit https://groups.google.com/d/optout.
_______________________________________________
devel mailing list
devel@xxxxxxxxxxxxxxxxxxxxxx
http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel



[Index of Archives]     [Linux Driver Backports]     [DMA Engine]     [Linux GPIO]     [Linux SPI]     [Video for Linux]     [Linux USB Devel]     [Linux Coverity]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [Yosemite Backpacking]
  Powered by Linux