[PATCH] drivers: staging: media: omap4iss: Use BIT macro instead of left shifting

[PATCH] drivers: staging: media: omap4iss: Use BIT macro instead of left shifting

[Moses Christopher Bollavarapu]

There is a BIT(nr) macro available in Linux Kernel,
which does the same thing.

Example:  1 << 7  is same as BIT(7)

Signed-off-by: Moses Christopher Bollavarapu <mosescb.dev@gmail.com>
---
 drivers/staging/media/omap4iss/iss_video.h | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/staging/media/omap4iss/iss_video.h b/drivers/staging/media/omap4iss/iss_video.h
index 526281bf0051..ea1cc311384a 100644
--- a/drivers/staging/media/omap4iss/iss_video.h
+++ b/drivers/staging/media/omap4iss/iss_video.h
@@ -55,17 +55,17 @@ enum iss_pipeline_state {
 	/* The stream has been started on the input video node. */
 	ISS_PIPELINE_STREAM_INPUT = 1,
 	/* The stream has been started on the output video node. */
-	ISS_PIPELINE_STREAM_OUTPUT = (1 << 1),
+	ISS_PIPELINE_STREAM_OUTPUT = BIT(1),
 	/* At least one buffer is queued on the input video node. */
-	ISS_PIPELINE_QUEUE_INPUT = (1 << 2),
+	ISS_PIPELINE_QUEUE_INPUT = BIT(2),
 	/* At least one buffer is queued on the output video node. */
-	ISS_PIPELINE_QUEUE_OUTPUT = (1 << 3),
+	ISS_PIPELINE_QUEUE_OUTPUT = BIT(3),
 	/* The input entity is idle, ready to be started. */
-	ISS_PIPELINE_IDLE_INPUT = (1 << 4),
+	ISS_PIPELINE_IDLE_INPUT = BIT(4),
 	/* The output entity is idle, ready to be started. */
-	ISS_PIPELINE_IDLE_OUTPUT = (1 << 5),
+	ISS_PIPELINE_IDLE_OUTPUT = BIT(5),
 	/* The pipeline is currently streaming. */
-	ISS_PIPELINE_STREAM = (1 << 6),
+	ISS_PIPELINE_STREAM = BIT(6),
 };
 
 /*
@@ -119,9 +119,9 @@ struct iss_buffer {
 
 enum iss_video_dmaqueue_flags {
 	/* Set if DMA queue becomes empty when ISS_PIPELINE_STREAM_CONTINUOUS */
-	ISS_VIDEO_DMAQUEUE_UNDERRUN = (1 << 0),
+	ISS_VIDEO_DMAQUEUE_UNDERRUN = BIT(0),
 	/* Set when queuing buffer to an empty DMA queue */
-	ISS_VIDEO_DMAQUEUE_QUEUED = (1 << 1),
+	ISS_VIDEO_DMAQUEUE_QUEUED = BIT(1),
 };
 
 #define iss_video_dmaqueue_flags_clr(video)	\
-- 
2.30.2

Re: [PATCH] drivers: staging: media: omap4iss: Use BIT macro instead of left shifting

[Dan Carpenter]

On Fri, Jan 21, 2022 at 10:37:22AM +0100, Moses Christopher Bollavarapu wrote:
> There is a BIT(nr) macro available in Linux Kernel,
> which does the same thing.
> 
> Example:  1 << 7  is same as BIT(7)
> 
> Signed-off-by: Moses Christopher Bollavarapu <mosescb.dev@gmail.com>
> ---
>  drivers/staging/media/omap4iss/iss_video.h | 16 ++++++++--------
>  1 file changed, 8 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/staging/media/omap4iss/iss_video.h b/drivers/staging/media/omap4iss/iss_video.h
> index 526281bf0051..ea1cc311384a 100644
> --- a/drivers/staging/media/omap4iss/iss_video.h
> +++ b/drivers/staging/media/omap4iss/iss_video.h
> @@ -55,17 +55,17 @@ enum iss_pipeline_state {
>  	/* The stream has been started on the input video node. */
>  	ISS_PIPELINE_STREAM_INPUT = 1,

This should be BIT(0).

>  	/* The stream has been started on the output video node. */
> -	ISS_PIPELINE_STREAM_OUTPUT = (1 << 1),
> +	ISS_PIPELINE_STREAM_OUTPUT = BIT(1),

regards,
dan carpenter

Re: [PATCH] drivers: staging: media: omap4iss: Use BIT macro instead of left shifting

[Moses Christopher Bollavarapu]

---
Use BIT(0) as suggested by Dan

Best,
Moses

Re: [PATCH] drivers: staging: media: omap4iss: Use BIT macro instead of left shifting

[Moses Christopher Bollavarapu]

---
Dan,
Sorry, I missed it.

Use BIT(0) instead of 1

Best,
Moses

[PATCH v2] drivers: staging: media: omap4iss: Use BIT macro instead of left shifting

[Moses Christopher Bollavarapu]

There is a BIT(nr) macro available in Linux Kernel,
which does the same thing.

Example:  1 << 7  is same as BIT(7)

Signed-off-by: Moses Christopher Bollavarapu <mosescb.dev@gmail.com>
---
 drivers/staging/media/omap4iss/iss_video.h | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/staging/media/omap4iss/iss_video.h b/drivers/staging/media/omap4iss/iss_video.h
index 526281bf0051..1724ed03ce9d 100644
--- a/drivers/staging/media/omap4iss/iss_video.h
+++ b/drivers/staging/media/omap4iss/iss_video.h
@@ -53,19 +53,19 @@ enum iss_pipeline_stream_state {
 
 enum iss_pipeline_state {
 	/* The stream has been started on the input video node. */
-	ISS_PIPELINE_STREAM_INPUT = 1,
+	ISS_PIPELINE_STREAM_INPUT = BIT(0),
 	/* The stream has been started on the output video node. */
-	ISS_PIPELINE_STREAM_OUTPUT = (1 << 1),
+	ISS_PIPELINE_STREAM_OUTPUT = BIT(1),
 	/* At least one buffer is queued on the input video node. */
-	ISS_PIPELINE_QUEUE_INPUT = (1 << 2),
+	ISS_PIPELINE_QUEUE_INPUT = BIT(2),
 	/* At least one buffer is queued on the output video node. */
-	ISS_PIPELINE_QUEUE_OUTPUT = (1 << 3),
+	ISS_PIPELINE_QUEUE_OUTPUT = BIT(3),
 	/* The input entity is idle, ready to be started. */
-	ISS_PIPELINE_IDLE_INPUT = (1 << 4),
+	ISS_PIPELINE_IDLE_INPUT = BIT(4),
 	/* The output entity is idle, ready to be started. */
-	ISS_PIPELINE_IDLE_OUTPUT = (1 << 5),
+	ISS_PIPELINE_IDLE_OUTPUT = BIT(5),
 	/* The pipeline is currently streaming. */
-	ISS_PIPELINE_STREAM = (1 << 6),
+	ISS_PIPELINE_STREAM = BIT(6),
 };
 
 /*
@@ -119,9 +119,9 @@ struct iss_buffer {
 
 enum iss_video_dmaqueue_flags {
 	/* Set if DMA queue becomes empty when ISS_PIPELINE_STREAM_CONTINUOUS */
-	ISS_VIDEO_DMAQUEUE_UNDERRUN = (1 << 0),
+	ISS_VIDEO_DMAQUEUE_UNDERRUN = BIT(0),
 	/* Set when queuing buffer to an empty DMA queue */
-	ISS_VIDEO_DMAQUEUE_QUEUED = (1 << 1),
+	ISS_VIDEO_DMAQUEUE_QUEUED = BIT(1),
 };
 
 #define iss_video_dmaqueue_flags_clr(video)	\
-- 
2.30.2

Re: [PATCH v2] drivers: staging: media: omap4iss: Use BIT macro instead of left shifting

[Greg KH]

On Fri, Jan 21, 2022 at 11:08:37AM +0100, Moses Christopher Bollavarapu wrote:
> There is a BIT(nr) macro available in Linux Kernel,
> which does the same thing.
> 
> Example:  1 << 7  is same as BIT(7)
> 
> Signed-off-by: Moses Christopher Bollavarapu <mosescb.dev@gmail.com>
> ---
>  drivers/staging/media/omap4iss/iss_video.h | 18 +++++++++---------
>  1 file changed, 9 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/staging/media/omap4iss/iss_video.h b/drivers/staging/media/omap4iss/iss_video.h
> index 526281bf0051..1724ed03ce9d 100644
> --- a/drivers/staging/media/omap4iss/iss_video.h
> +++ b/drivers/staging/media/omap4iss/iss_video.h
> @@ -53,19 +53,19 @@ enum iss_pipeline_stream_state {
>  
>  enum iss_pipeline_state {
>  	/* The stream has been started on the input video node. */
> -	ISS_PIPELINE_STREAM_INPUT = 1,
> +	ISS_PIPELINE_STREAM_INPUT = BIT(0),
>  	/* The stream has been started on the output video node. */
> -	ISS_PIPELINE_STREAM_OUTPUT = (1 << 1),
> +	ISS_PIPELINE_STREAM_OUTPUT = BIT(1),
>  	/* At least one buffer is queued on the input video node. */
> -	ISS_PIPELINE_QUEUE_INPUT = (1 << 2),
> +	ISS_PIPELINE_QUEUE_INPUT = BIT(2),
>  	/* At least one buffer is queued on the output video node. */
> -	ISS_PIPELINE_QUEUE_OUTPUT = (1 << 3),
> +	ISS_PIPELINE_QUEUE_OUTPUT = BIT(3),
>  	/* The input entity is idle, ready to be started. */
> -	ISS_PIPELINE_IDLE_INPUT = (1 << 4),
> +	ISS_PIPELINE_IDLE_INPUT = BIT(4),
>  	/* The output entity is idle, ready to be started. */
> -	ISS_PIPELINE_IDLE_OUTPUT = (1 << 5),
> +	ISS_PIPELINE_IDLE_OUTPUT = BIT(5),
>  	/* The pipeline is currently streaming. */
> -	ISS_PIPELINE_STREAM = (1 << 6),
> +	ISS_PIPELINE_STREAM = BIT(6),
>  };
>  
>  /*
> @@ -119,9 +119,9 @@ struct iss_buffer {
>  
>  enum iss_video_dmaqueue_flags {
>  	/* Set if DMA queue becomes empty when ISS_PIPELINE_STREAM_CONTINUOUS */
> -	ISS_VIDEO_DMAQUEUE_UNDERRUN = (1 << 0),
> +	ISS_VIDEO_DMAQUEUE_UNDERRUN = BIT(0),
>  	/* Set when queuing buffer to an empty DMA queue */
> -	ISS_VIDEO_DMAQUEUE_QUEUED = (1 << 1),
> +	ISS_VIDEO_DMAQUEUE_QUEUED = BIT(1),
>  };
>  
>  #define iss_video_dmaqueue_flags_clr(video)	\
> -- 
> 2.30.2
> 
> 

Hi,

This is the friendly patch-bot of Greg Kroah-Hartman.  You have sent him
a patch that has triggered this response.  He used to manually respond
to these common problems, but in order to save his sanity (he kept
writing the same thing over and over, yet to different people), I was
created.  Hopefully you will not take offence and will fix the problem
in your patch and resubmit it so that it can be accepted into the Linux
kernel tree.

You are receiving this message because of the following common error(s)
as indicated below:

- This looks like a new version of a previously submitted patch, but you
  did not list below the --- line any changes from the previous version.
  Please read the section entitled "The canonical patch format" in the
  kernel file, Documentation/SubmittingPatches for what needs to be done
  here to properly describe this.

If you wish to discuss this problem further, or you have questions about
how to resolve this issue, please feel free to respond to this email and
Greg will reply once he has dug out from the pending patches received
from other developers.

thanks,

greg k-h's patch email bot

Re: [PATCH v2] drivers: staging: media: omap4iss: Use BIT macro instead of left shifting

[Dan Carpenter]

On Fri, Jan 21, 2022 at 11:08:37AM +0100, Moses Christopher Bollavarapu wrote:
> There is a BIT(nr) macro available in Linux Kernel,
> which does the same thing.
> 
> Example:  1 << 7  is same as BIT(7)
> 
> Signed-off-by: Moses Christopher Bollavarapu <mosescb.dev@gmail.com>

Thanks!

Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>

regards,
dan carpenter

[PATCH v3] drivers: staging: media: omap4iss: Use BIT macro instead of left shifting

[Moses Christopher Bollavarapu]

There is a BIT(nr) macro available in Linux Kernel,
which does the same thing.

Example:  1 << 7  is same as BIT(7)

Signed-off-by: Moses Christopher Bollavarapu <mosescb.dev@gmail.com>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
---
 V2 -> V3: Add Dan's Reviewed-by tag to commit message
 V1 -> V2: Use BIT(0) instead of 1

 drivers/staging/media/omap4iss/iss_video.h | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/staging/media/omap4iss/iss_video.h b/drivers/staging/media/omap4iss/iss_video.h
index 526281bf0051..1724ed03ce9d 100644
--- a/drivers/staging/media/omap4iss/iss_video.h
+++ b/drivers/staging/media/omap4iss/iss_video.h
@@ -53,19 +53,19 @@ enum iss_pipeline_stream_state {
 
 enum iss_pipeline_state {
 	/* The stream has been started on the input video node. */
-	ISS_PIPELINE_STREAM_INPUT = 1,
+	ISS_PIPELINE_STREAM_INPUT = BIT(0),
 	/* The stream has been started on the output video node. */
-	ISS_PIPELINE_STREAM_OUTPUT = (1 << 1),
+	ISS_PIPELINE_STREAM_OUTPUT = BIT(1),
 	/* At least one buffer is queued on the input video node. */
-	ISS_PIPELINE_QUEUE_INPUT = (1 << 2),
+	ISS_PIPELINE_QUEUE_INPUT = BIT(2),
 	/* At least one buffer is queued on the output video node. */
-	ISS_PIPELINE_QUEUE_OUTPUT = (1 << 3),
+	ISS_PIPELINE_QUEUE_OUTPUT = BIT(3),
 	/* The input entity is idle, ready to be started. */
-	ISS_PIPELINE_IDLE_INPUT = (1 << 4),
+	ISS_PIPELINE_IDLE_INPUT = BIT(4),
 	/* The output entity is idle, ready to be started. */
-	ISS_PIPELINE_IDLE_OUTPUT = (1 << 5),
+	ISS_PIPELINE_IDLE_OUTPUT = BIT(5),
 	/* The pipeline is currently streaming. */
-	ISS_PIPELINE_STREAM = (1 << 6),
+	ISS_PIPELINE_STREAM = BIT(6),
 };
 
 /*
@@ -119,9 +119,9 @@ struct iss_buffer {
 
 enum iss_video_dmaqueue_flags {
 	/* Set if DMA queue becomes empty when ISS_PIPELINE_STREAM_CONTINUOUS */
-	ISS_VIDEO_DMAQUEUE_UNDERRUN = (1 << 0),
+	ISS_VIDEO_DMAQUEUE_UNDERRUN = BIT(0),
 	/* Set when queuing buffer to an empty DMA queue */
-	ISS_VIDEO_DMAQUEUE_QUEUED = (1 << 1),
+	ISS_VIDEO_DMAQUEUE_QUEUED = BIT(1),
 };
 
 #define iss_video_dmaqueue_flags_clr(video)	\
-- 
2.30.2

Re: [PATCH v3] drivers: staging: media: omap4iss: Use BIT macro instead of left shifting

[Laurent Pinchart]

Hi Moses,

Thank you for the patch.

On Fri, Jan 21, 2022 at 11:51:11AM +0100, Moses Christopher Bollavarapu wrote:
> There is a BIT(nr) macro available in Linux Kernel,
> which does the same thing.
> 
> Example:  1 << 7  is same as BIT(7)
> 
> Signed-off-by: Moses Christopher Bollavarapu <mosescb.dev@gmail.com>
> Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> ---
>  V2 -> V3: Add Dan's Reviewed-by tag to commit message
>  V1 -> V2: Use BIT(0) instead of 1
> 
>  drivers/staging/media/omap4iss/iss_video.h | 18 +++++++++---------
>  1 file changed, 9 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/staging/media/omap4iss/iss_video.h b/drivers/staging/media/omap4iss/iss_video.h
> index 526281bf0051..1724ed03ce9d 100644
> --- a/drivers/staging/media/omap4iss/iss_video.h
> +++ b/drivers/staging/media/omap4iss/iss_video.h
> @@ -53,19 +53,19 @@ enum iss_pipeline_stream_state {
>  
>  enum iss_pipeline_state {
>  	/* The stream has been started on the input video node. */
> -	ISS_PIPELINE_STREAM_INPUT = 1,
> +	ISS_PIPELINE_STREAM_INPUT = BIT(0),
>  	/* The stream has been started on the output video node. */
> -	ISS_PIPELINE_STREAM_OUTPUT = (1 << 1),
> +	ISS_PIPELINE_STREAM_OUTPUT = BIT(1),
>  	/* At least one buffer is queued on the input video node. */
> -	ISS_PIPELINE_QUEUE_INPUT = (1 << 2),
> +	ISS_PIPELINE_QUEUE_INPUT = BIT(2),
>  	/* At least one buffer is queued on the output video node. */
> -	ISS_PIPELINE_QUEUE_OUTPUT = (1 << 3),
> +	ISS_PIPELINE_QUEUE_OUTPUT = BIT(3),
>  	/* The input entity is idle, ready to be started. */
> -	ISS_PIPELINE_IDLE_INPUT = (1 << 4),
> +	ISS_PIPELINE_IDLE_INPUT = BIT(4),
>  	/* The output entity is idle, ready to be started. */
> -	ISS_PIPELINE_IDLE_OUTPUT = (1 << 5),
> +	ISS_PIPELINE_IDLE_OUTPUT = BIT(5),
>  	/* The pipeline is currently streaming. */
> -	ISS_PIPELINE_STREAM = (1 << 6),
> +	ISS_PIPELINE_STREAM = BIT(6),
>  };
>  
>  /*
> @@ -119,9 +119,9 @@ struct iss_buffer {
>  
>  enum iss_video_dmaqueue_flags {
>  	/* Set if DMA queue becomes empty when ISS_PIPELINE_STREAM_CONTINUOUS */
> -	ISS_VIDEO_DMAQUEUE_UNDERRUN = (1 << 0),
> +	ISS_VIDEO_DMAQUEUE_UNDERRUN = BIT(0),
>  	/* Set when queuing buffer to an empty DMA queue */
> -	ISS_VIDEO_DMAQUEUE_QUEUED = (1 << 1),
> +	ISS_VIDEO_DMAQUEUE_QUEUED = BIT(1),
>  };
>  
>  #define iss_video_dmaqueue_flags_clr(video)	\

-- 
Regards,

Laurent Pinchart