* [PATCH] drm/komeda: Use memset to initialize config_id
@ 2019-04-25 6:27 Nathan Chancellor
2019-04-25 17:25 ` Nick Desaulniers
2019-04-26 10:10 ` Liviu Dudau
0 siblings, 2 replies; 3+ messages in thread
From: Nathan Chancellor @ 2019-04-25 6:27 UTC (permalink / raw)
To: James (Qian) Wang, Liviu Dudau, Brian Starkey
Cc: malidp, dri-devel, linux-kernel, Nick Desaulniers,
clang-built-linux, Nathan Chancellor
Clang warns:
drivers/gpu/drm/arm/display/komeda/komeda_dev.c:76:38: warning: suggest
braces around initialization of subobject [-Wmissing-braces]
union komeda_config_id config_id = {0,};
^
{}
1 warning generated.
One way to fix these warnings is to add additional braces like Clang
suggests; however, there has been a bit of push back from some
maintainers, who just prefer memset as it is unambiguous, doesn't
depend on a particular compiler version, and properly initializes all
subobjects [1][2]. Do that here so there are no more warnings.
[1]: https://lore.kernel.org/lkml/022e41c0-8465-dc7a-a45c-64187ecd9684@amd.com/
[2]: https://lore.kernel.org/lkml/20181128.215241.702406654469517539.davem@davemloft.net/
Fixes: 4cc734cb79a8 ("drm/komeda: Add sysfs attribute: core_id and config_id")
Link: https://github.com/ClangBuiltLinux/linux/issues/457
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
---
drivers/gpu/drm/arm/display/komeda/komeda_dev.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_dev.c b/drivers/gpu/drm/arm/display/komeda/komeda_dev.c
index 9d6c31cca875..e605a518f59a 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_dev.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_dev.c
@@ -73,9 +73,10 @@ config_id_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct komeda_dev *mdev = dev_to_mdev(dev);
struct komeda_pipeline *pipe = mdev->pipelines[0];
- union komeda_config_id config_id = {0,};
+ union komeda_config_id config_id;
int i;
+ memset(&config_id, 0, sizeof(config_id));
config_id.max_line_sz = pipe->layers[0]->hsize_in.end;
config_id.n_pipelines = mdev->n_pipelines;
config_id.n_scalers = pipe->n_scalers;
--
2.21.0
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] drm/komeda: Use memset to initialize config_id
2019-04-25 6:27 [PATCH] drm/komeda: Use memset to initialize config_id Nathan Chancellor
@ 2019-04-25 17:25 ` Nick Desaulniers
2019-04-26 10:10 ` Liviu Dudau
1 sibling, 0 replies; 3+ messages in thread
From: Nick Desaulniers @ 2019-04-25 17:25 UTC (permalink / raw)
To: Nathan Chancellor
Cc: James (Qian) Wang, Liviu Dudau, Brian Starkey, malidp, dri-devel,
LKML, clang-built-linux
On Wed, Apr 24, 2019 at 11:27 PM Nathan Chancellor
<natechancellor@gmail.com> wrote:
>
> Clang warns:
>
> drivers/gpu/drm/arm/display/komeda/komeda_dev.c:76:38: warning: suggest
> braces around initialization of subobject [-Wmissing-braces]
> union komeda_config_id config_id = {0,};
> ^
> {}
> 1 warning generated.
>
> One way to fix these warnings is to add additional braces like Clang
> suggests; however, there has been a bit of push back from some
> maintainers, who just prefer memset as it is unambiguous, doesn't
> depend on a particular compiler version, and properly initializes all
> subobjects [1][2]. Do that here so there are no more warnings.
>
> [1]: https://lore.kernel.org/lkml/022e41c0-8465-dc7a-a45c-64187ecd9684@amd.com/
> [2]: https://lore.kernel.org/lkml/20181128.215241.702406654469517539.davem@davemloft.net/
>
> Fixes: 4cc734cb79a8 ("drm/komeda: Add sysfs attribute: core_id and config_id")
> Link: https://github.com/ClangBuiltLinux/linux/issues/457
> Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
> ---
> drivers/gpu/drm/arm/display/komeda/komeda_dev.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_dev.c b/drivers/gpu/drm/arm/display/komeda/komeda_dev.c
> index 9d6c31cca875..e605a518f59a 100644
> --- a/drivers/gpu/drm/arm/display/komeda/komeda_dev.c
> +++ b/drivers/gpu/drm/arm/display/komeda/komeda_dev.c
> @@ -73,9 +73,10 @@ config_id_show(struct device *dev, struct device_attribute *attr, char *buf)
> {
> struct komeda_dev *mdev = dev_to_mdev(dev);
> struct komeda_pipeline *pipe = mdev->pipelines[0];
> - union komeda_config_id config_id = {0,};
Haven't seen a trailing comma too often. Thanks for the patch.
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
> + union komeda_config_id config_id;
> int i;
>
> + memset(&config_id, 0, sizeof(config_id));
> config_id.max_line_sz = pipe->layers[0]->hsize_in.end;
> config_id.n_pipelines = mdev->n_pipelines;
> config_id.n_scalers = pipe->n_scalers;
> --
> 2.21.0
>
--
Thanks,
~Nick Desaulniers
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] drm/komeda: Use memset to initialize config_id
2019-04-25 6:27 [PATCH] drm/komeda: Use memset to initialize config_id Nathan Chancellor
2019-04-25 17:25 ` Nick Desaulniers
@ 2019-04-26 10:10 ` Liviu Dudau
1 sibling, 0 replies; 3+ messages in thread
From: Liviu Dudau @ 2019-04-26 10:10 UTC (permalink / raw)
To: Nathan Chancellor
Cc: James (Qian) Wang, Brian Starkey, malidp, dri-devel,
linux-kernel, Nick Desaulniers, clang-built-linux
On Wed, Apr 24, 2019 at 11:27:20PM -0700, Nathan Chancellor wrote:
> Clang warns:
>
> drivers/gpu/drm/arm/display/komeda/komeda_dev.c:76:38: warning: suggest
> braces around initialization of subobject [-Wmissing-braces]
> union komeda_config_id config_id = {0,};
> ^
> {}
> 1 warning generated.
>
> One way to fix these warnings is to add additional braces like Clang
> suggests; however, there has been a bit of push back from some
> maintainers, who just prefer memset as it is unambiguous, doesn't
> depend on a particular compiler version, and properly initializes all
> subobjects [1][2]. Do that here so there are no more warnings.
>
> [1]: https://lore.kernel.org/lkml/022e41c0-8465-dc7a-a45c-64187ecd9684@amd.com/
> [2]: https://lore.kernel.org/lkml/20181128.215241.702406654469517539.davem@davemloft.net/
>
> Fixes: 4cc734cb79a8 ("drm/komeda: Add sysfs attribute: core_id and config_id")
> Link: https://github.com/ClangBuiltLinux/linux/issues/457
> Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Acked-by: Liviu Dudau <liviu.dudau@arm.com>
I'll pull the patch into my tree today.
Best regards,
Liviu
> ---
> drivers/gpu/drm/arm/display/komeda/komeda_dev.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_dev.c b/drivers/gpu/drm/arm/display/komeda/komeda_dev.c
> index 9d6c31cca875..e605a518f59a 100644
> --- a/drivers/gpu/drm/arm/display/komeda/komeda_dev.c
> +++ b/drivers/gpu/drm/arm/display/komeda/komeda_dev.c
> @@ -73,9 +73,10 @@ config_id_show(struct device *dev, struct device_attribute *attr, char *buf)
> {
> struct komeda_dev *mdev = dev_to_mdev(dev);
> struct komeda_pipeline *pipe = mdev->pipelines[0];
> - union komeda_config_id config_id = {0,};
> + union komeda_config_id config_id;
> int i;
>
> + memset(&config_id, 0, sizeof(config_id));
> config_id.max_line_sz = pipe->layers[0]->hsize_in.end;
> config_id.n_pipelines = mdev->n_pipelines;
> config_id.n_scalers = pipe->n_scalers;
> --
> 2.21.0
>
--
====================
| I would like to |
| fix the world, |
| but they're not |
| giving me the |
\ source code! /
---------------
¯\_(ツ)_/¯
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2019-04-26 10:10 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-04-25 6:27 [PATCH] drm/komeda: Use memset to initialize config_id Nathan Chancellor
2019-04-25 17:25 ` Nick Desaulniers
2019-04-26 10:10 ` Liviu Dudau
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).