Re: linux-next: build failure after merge of the amdgpu tree

[Greg KH <greg@kroah.com>]

On Thu, Jun 23, 2022 at 04:07:23PM +1000, Stephen Rothwell wrote:
> Hi all,
> 
> After merging the amdgpu tree, today's linux-next build (x86_64
> allmodconfig) failed like this:
> 
> In file included from include/linux/radix-tree.h:12,
>                  from include/linux/idr.h:15,
>                  from include/linux/kernfs.h:12,
>                  from include/linux/sysfs.h:16,
>                  from include/linux/kobject.h:20,
>                  from include/linux/energy_model.h:7,
>                  from include/linux/device.h:16,
>                  from include/linux/power_supply.h:15,
>                  from drivers/gpu/drm/amd/amdgpu/amdgpu_device.c:28:
> drivers/gpu/drm/amd/amdgpu/amdgpu_device.c: In function 'amdgpu_reset_capture_coredumpm':
> include/linux/gfp.h:337:25: error: passing argument 5 of 'dev_coredumpm' makes pointer from integer without a cast [-Werror=int-conversion]
>   337 | #define GFP_KERNEL      (__GFP_RECLAIM | __GFP_IO | __GFP_FS)
>       |                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>       |                         |
>       |                         unsigned int
> drivers/gpu/drm/amd/amdgpu/amdgpu_device.c:4726:55: note: in expansion of macro 'GFP_KERNEL'
>  4726 |         dev_coredumpm(dev->dev, THIS_MODULE, adev, 0, GFP_KERNEL,
>       |                                                       ^~~~~~~~~~
> In file included from drivers/gpu/drm/amd/amdgpu/amdgpu_device.c:35:
> include/linux/devcoredump.h:59:30: note: expected 'ssize_t (*)(char *, loff_t,  size_t,  void *, size_t)' {aka 'long int (*)(char *, long long int,  long unsigned int,  void *, long unsigned int)'} but argument is of type 'unsigned int'
>    59 |                    ssize_t (*read)(char *buffer, loff_t offset, size_t count,
>       |                    ~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>    60 |                                    void *data, size_t datalen),
>       |                                    ~~~~~~~~~~~~~~~~~~~~~~~~~~~
> drivers/gpu/drm/amd/amdgpu/amdgpu_device.c:4727:23: error: passing argument 6 of 'dev_coredumpm' from incompatible pointer type [-Werror=incompatible-pointer-types]
>  4727 |                       amdgpu_devcoredump_read, amdgpu_devcoredump_free);
>       |                       ^~~~~~~~~~~~~~~~~~~~~~~
>       |                       |
>       |                       ssize_t (*)(char *, loff_t,  size_t,  void *, size_t) {aka long int (*)(char *, long long int,  long unsigned int,  void *, long unsigned int)}
> In file included from drivers/gpu/drm/amd/amdgpu/amdgpu_device.c:35:
> include/linux/devcoredump.h:61:27: note: expected 'void (*)(void *)' but argument is of type 'ssize_t (*)(char *, loff_t,  size_t,  void *, size_t)' {aka 'long int (*)(char *, long long int,  long unsigned int,  void *, long unsigned int)'}
>    61 |                    void (*free)(void *data));
>       |                    ~~~~~~~^~~~~~~~~~~~~~~~~
> drivers/gpu/drm/amd/amdgpu/amdgpu_device.c:4726:9: error: too many arguments to function 'dev_coredumpm'
>  4726 |         dev_coredumpm(dev->dev, THIS_MODULE, adev, 0, GFP_KERNEL,
>       |         ^~~~~~~~~~~~~
> In file included from drivers/gpu/drm/amd/amdgpu/amdgpu_device.c:35:
> include/linux/devcoredump.h:57:6: note: declared here
>    57 | void dev_coredumpm(struct device *dev, struct module *owner,
>       |      ^~~~~~~~~~~~~
> cc1: all warnings being treated as errors
> 
> Caused by commit
> 
>   3d8785f6c04a ("drm/amdgpu: adding device coredump support")
> 
> interacting with commit
> 
>   77515ebaf019 ("devcoredump: remove the useless gfp_t parameter in dev_coredumpv and dev_coredumpm")
> 
> from the driver-core tree.
> 
> I have applied the following merge resolution patch for today.
> 
> From: Stephen Rothwell <sfr@canb.auug.org.au>
> Date: Thu, 23 Jun 2022 15:56:22 +1000
> Subject: [PATCH] fix up for "devcoredump: remove the useless gfp_t parameter in dev_coredumpv and dev_coredumpm"
> 
> interacting with
> 
>   3d8785f6c04a ("drm/amdgpu: adding device coredump support")
> 
> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> index f2a4c268ac72..9d6418bb963e 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> @@ -4723,7 +4723,7 @@ static void amdgpu_reset_capture_coredumpm(struct amdgpu_device *adev)
>  	struct drm_device *dev = adev_to_drm(adev);
>  
>  	ktime_get_ts64(&adev->reset_time);
> -	dev_coredumpm(dev->dev, THIS_MODULE, adev, 0, GFP_KERNEL,
> +	dev_coredumpm(dev->dev, THIS_MODULE, adev, 0,
>  		      amdgpu_devcoredump_read, amdgpu_devcoredump_free);
>  }
>  #endif

Ok, this isn't going to work as-is.  I'll go revert this patch (and the
other one) from my tree and then request this to be done in a way that
does not break anyone going forward, if possible...

thanks,

greg k-h