linux-kernel - Re: [PATCH 2/3] drm/msm: clean up fault injection usage

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Message-ID: <45b355b96bab31ac1c28a24c82d3edabf081ada7.camel@linux.intel.com>
Date: Tue, 13 Aug 2024 14:30:32 +0200
From: Thomas Hellström <thomas.hellstrom@...ux.intel.com>
To: Jani Nikula <jani.nikula@...el.com>, linux-kernel@...r.kernel.org
Cc: intel-xe@...ts.freedesktop.org, linux-arm-msm@...r.kernel.org, 
 dri-devel@...ts.freedesktop.org, akinobu.mita@...il.com, 
 akpm@...ux-foundation.org, lucas.demarchi@...el.com,
 rodrigo.vivi@...el.com,  robdclark@...il.com, quic_abhinavk@...cinc.com,
 dmitry.baryshkov@...aro.org
Subject: Re: [PATCH 2/3] drm/msm: clean up fault injection usage

On Tue, 2024-08-13 at 15:12 +0300, Jani Nikula wrote:
> With the proper stubs in place in linux/fault-inject.h, we can remove
> a
> bunch of conditional compilation for CONFIG_FAULT_INJECTION=n.
> 
> Cc: Andrew Morton <akpm@...ux-foundation.org>
> Cc: Akinobu Mita <akinobu.mita@...il.com>
> Cc: Rob Clark <robdclark@...il.com>
> Cc: Abhinav Kumar <quic_abhinavk@...cinc.com>
> Cc: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> Signed-off-by: Jani Nikula <jani.nikula@...el.com>

LGTM.
Reviewed-by: Thomas Hellström <thomas.hellstrom@...ux.intel.com>

> ---
>  drivers/gpu/drm/msm/msm_debugfs.c | 2 --
>  drivers/gpu/drm/msm/msm_drv.c     | 2 --
>  drivers/gpu/drm/msm/msm_drv.h     | 4 ----
>  3 files changed, 8 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/msm_debugfs.c
> b/drivers/gpu/drm/msm/msm_debugfs.c
> index 4494f6d1c7cb..7ab607252d18 100644
> --- a/drivers/gpu/drm/msm/msm_debugfs.c
> +++ b/drivers/gpu/drm/msm/msm_debugfs.c
> @@ -357,12 +357,10 @@ void msm_debugfs_init(struct drm_minor *minor)
>  	if (priv->kms && priv->kms->funcs->debugfs_init)
>  		priv->kms->funcs->debugfs_init(priv->kms, minor);
>  
> -#ifdef CONFIG_FAULT_INJECTION
>  	fault_create_debugfs_attr("fail_gem_alloc", minor-
> >debugfs_root,
>  				  &fail_gem_alloc);
>  	fault_create_debugfs_attr("fail_gem_iova", minor-
> >debugfs_root,
>  				  &fail_gem_iova);
> -#endif
>  }
>  #endif
>  
> diff --git a/drivers/gpu/drm/msm/msm_drv.c
> b/drivers/gpu/drm/msm/msm_drv.c
> index 9c33f4e3f822..6938410f4fc7 100644
> --- a/drivers/gpu/drm/msm/msm_drv.c
> +++ b/drivers/gpu/drm/msm/msm_drv.c
> @@ -58,10 +58,8 @@ static bool modeset = true;
>  MODULE_PARM_DESC(modeset, "Use kernel modesetting [KMS] (1=on
> (default), 0=disable)");
>  module_param(modeset, bool, 0600);
>  
> -#ifdef CONFIG_FAULT_INJECTION
>  DECLARE_FAULT_ATTR(fail_gem_alloc);
>  DECLARE_FAULT_ATTR(fail_gem_iova);
> -#endif
>  
>  static int msm_drm_uninit(struct device *dev)
>  {
> diff --git a/drivers/gpu/drm/msm/msm_drv.h
> b/drivers/gpu/drm/msm/msm_drv.h
> index be016d7b4ef1..9b953860131b 100644
> --- a/drivers/gpu/drm/msm/msm_drv.h
> +++ b/drivers/gpu/drm/msm/msm_drv.h
> @@ -33,12 +33,8 @@
>  #include <drm/msm_drm.h>
>  #include <drm/drm_gem.h>
>  
> -#ifdef CONFIG_FAULT_INJECTION
>  extern struct fault_attr fail_gem_alloc;
>  extern struct fault_attr fail_gem_iova;
> -#else
> -#  define should_fail(attr, size) 0
> -#endif
>  
>  struct msm_kms;
>  struct msm_gpu;