Re: [PATCH] Documentation/gpu: resolve kerneldoc duplicate declaration warning

[Sanjay Chitroda]

On 18 March 2026 8:06:12 pm IST, Sanjay Chitroda <sanjayembeddedse@xxxxxxxxx> wrote:
>From: Sanjay Chitroda <sanjayembeddedse@xxxxxxxxx>
>
>kernel-doc build with `make htmldocs` reports following WARNINGS.
>
>  Documentation/gpu/drm-kms:360: ../drivers/gpu/drm/drm_fourcc.c:397:
>  WARNING: Duplicate C declaration, also defined at gpu/drm-kms:35.
>  Declaration is '.. c:function::
>  const struct drm_format_info * drm_format_info (u32 format)'.
>
>  Documentation/gpu/drm-kms:491: ../drivers/gpu/drm/drm_modeset_lock.c:377:
>  WARNING: Duplicate C declaration, also defined at gpu/drm-kms:48.
>  Declaration is '.. c:function:: int drm_modeset_lock
>  (struct drm_modeset_lock *lock, struct drm_modeset_acquire_ctx *ctx)'.
>
>  Documentation/gpu/drm-uapi:607: ../drivers/gpu/drm/drm_ioctl.c:923:
>  WARNING: Duplicate C declaration, also defined at gpu/drm-uapi:69.
>  Declaration is '.. c:function::
>  bool drm_ioctl_flags (unsigned int nr, unsigned int *flags)'.
>
>Add :no-identifiers: to prevent duplicate identifier generation and
>keep the function documented at its implementation site.
>
>No functional change.
>
>Link: https://lore.kernel.org/oe-kbuild-all/202512302319.1PGGt3CN-lkp@xxxxxxxxx/
>Signed-off-by: Sanjay Chitroda <sanjayembeddedse@xxxxxxxxx>
>---
> Documentation/gpu/drm-kms.rst  | 2 ++
> Documentation/gpu/drm-uapi.rst | 3 ++-
> 2 files changed, 4 insertions(+), 1 deletion(-)
>
>diff --git a/Documentation/gpu/drm-kms.rst b/Documentation/gpu/drm-kms.rst
>index 2292e65f044c..0f0f90b3186d 100644
>--- a/Documentation/gpu/drm-kms.rst
>+++ b/Documentation/gpu/drm-kms.rst
>@@ -356,6 +356,7 @@ Format Functions Reference
> 
> .. kernel-doc:: include/drm/drm_fourcc.h
>    :internal:
>+   :no-identifiers: drm_format_info
> 
> .. kernel-doc:: drivers/gpu/drm/drm_fourcc.c
>    :export:
>@@ -487,6 +488,7 @@ KMS Locking
> 
> .. kernel-doc:: include/drm/drm_modeset_lock.h
>    :internal:
>+   :no-identifiers: drm_modeset_lock
> 
> .. kernel-doc:: drivers/gpu/drm/drm_modeset_lock.c
>    :export:
>diff --git a/Documentation/gpu/drm-uapi.rst b/Documentation/gpu/drm-uapi.rst
>index d98428a592f1..73b49e0dcda8 100644
>--- a/Documentation/gpu/drm-uapi.rst
>+++ b/Documentation/gpu/drm-uapi.rst
>@@ -603,6 +603,7 @@ DRM specific patterns. Note that ENOTTY has the slightly unintuitive meaning of
> 
> .. kernel-doc:: include/drm/drm_ioctl.h
>    :internal:
>+   :no-identifiers: drm_ioctl_flags
> 
> .. kernel-doc:: drivers/gpu/drm/drm_ioctl.c
>    :export:
>@@ -761,4 +762,4 @@ Stable uAPI events
> From ``drivers/gpu/drm/scheduler/gpu_scheduler_trace.h``
> 
> .. kernel-doc::  drivers/gpu/drm/scheduler/gpu_scheduler_trace.h
>-   :doc: uAPI trace events
>\ No newline at end of file
>+   :doc: uAPI trace events

Hi all,

Requesting your input on the change.
Is there anything that I missed or required correction ?