build failure of next-20220811 due to b1a63a0b48ad ("drm/amd/display: consider DSC pass-through during mode validation")

build failure of next-20220811 due to b1a63a0b48ad ("drm/amd/display: consider DSC pass-through during mode validation")

[Sudip Mukherjee (Codethink)]

Hi All,

Not sure if it has been reported, builds of riscv, alpha, s390, arm,
arm64, xtensa, mips, csky allmodconfig have failed to build next-20220811
with the error:

ERROR: modpost: "dc_dsc_compute_bandwidth_range" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
ERROR: modpost: "dc_dsc_get_policy_for_timing" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!

git bisect pointed to b1a63a0b48ad ("drm/amd/display: consider DSC pass-through during mode validation")
And, reverting that commit has fixed the build failure.

I will be happy to test any patch or provide any extra log if needed.


--
Regards
Sudip

Re: build failure of next-20220811 due to b1a63a0b48ad ("drm/amd/display: consider DSC pass-through during mode validation")

[Alex Deucher]

On Thu, Aug 11, 2022 at 1:11 PM Sudip Mukherjee (Codethink)
<sudipm.mukherjee@gmail.com> wrote:
>
> Hi All,
>
> Not sure if it has been reported, builds of riscv, alpha, s390, arm,
> arm64, xtensa, mips, csky allmodconfig have failed to build next-20220811
> with the error:
>
> ERROR: modpost: "dc_dsc_compute_bandwidth_range" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
> ERROR: modpost: "dc_dsc_get_policy_for_timing" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
>
> git bisect pointed to b1a63a0b48ad ("drm/amd/display: consider DSC pass-through during mode validation")
> And, reverting that commit has fixed the build failure.
>
> I will be happy to test any patch or provide any extra log if needed.

https://patchwork.freedesktop.org/patch/497116/

Alex

>
>
> --
> Regards
> Sudip

Re: build failure of next-20220811 due to b1a63a0b48ad ("drm/amd/display: consider DSC pass-through during mode validation")

[Sudip Mukherjee]

On Thu, Aug 11, 2022 at 6:16 PM Alex Deucher <alexdeucher@gmail.com> wrote:
>
> On Thu, Aug 11, 2022 at 1:11 PM Sudip Mukherjee (Codethink)
> <sudipm.mukherjee@gmail.com> wrote:
> >
> > Hi All,
> >
> > Not sure if it has been reported, builds of riscv, alpha, s390, arm,
> > arm64, xtensa, mips, csky allmodconfig have failed to build next-20220811
> > with the error:
> >
> > ERROR: modpost: "dc_dsc_compute_bandwidth_range" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
> > ERROR: modpost: "dc_dsc_get_policy_for_timing" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
> >
> > git bisect pointed to b1a63a0b48ad ("drm/amd/display: consider DSC pass-through during mode validation")
> > And, reverting that commit has fixed the build failure.
> >
> > I will be happy to test any patch or provide any extra log if needed.
>
> https://patchwork.freedesktop.org/patch/497116/

Thanks, that has fixed this failure. But it has now caused these new
errors resulting in a build failure.

drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_mst_types.c:
In function 'dm_dp_mst_is_port_support_mode':
drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_mst_types.c:1427:32:
error: unused variable 'bw_range' [-Werror=unused-variable]
 1427 |         struct dc_dsc_bw_range bw_range = {0};
      |                                ^~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_mst_types.c:1426:22:
error: unused variable 'max_compressed_bw_in_kbps'
[-Werror=unused-variable]
 1426 |         unsigned int max_compressed_bw_in_kbps = 0;
      |                      ^~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_mst_types.c:1425:49:
error: unused variable 'down_link_bw_in_kbps'
[-Werror=unused-variable]
 1425 |         unsigned int upper_link_bw_in_kbps = 0,
down_link_bw_in_kbps = 0;
      |                                                 ^~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_mst_types.c:1425:22:
error: unused variable 'upper_link_bw_in_kbps'
[-Werror=unused-variable]
 1425 |         unsigned int upper_link_bw_in_kbps = 0,
down_link_bw_in_kbps = 0;
      |                      ^~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_mst_types.c:1424:22:
error: unused variable 'end_to_end_bw_in_kbps'
[-Werror=unused-variable]
 1424 |         unsigned int end_to_end_bw_in_kbps = 0;
      |                      ^~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_mst_types.c:1423:33:
error: unused variable 'cur_link_settings' [-Werror=unused-variable]
 1423 |         struct dc_link_settings cur_link_settings;



-- 
Regards
Sudip

[PATCH v2] drm/amd/display: fix DSC related non-x86/PPC64 compilation issue

[Hamza Mahfooz]

Need to protect DSC code with CONFIG_DRM_AMD_DC_DCN.
Fixes the following build errors on arm64:
ERROR: modpost: "dc_dsc_get_policy_for_timing" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
ERROR: modpost: "dc_dsc_compute_bandwidth_range" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!

Fixes: 0087990a9f57 ("drm/amd/display: consider DSC pass-through during mode validation")
Reported-by: Anders Roxell <anders.roxell@linaro.org>
Signed-off-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
---
v2: Fix WERROR build failure by guarding unused variables
---
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c  | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
index ef6c94cd852b..ce6929224a6e 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
@@ -1387,8 +1387,6 @@ bool pre_validate_dsc(struct drm_atomic_state *state,
 	return (ret == 0);
 }
 
-#endif
-
 static unsigned int kbps_from_pbn(unsigned int pbn)
 {
 	unsigned int kbps = pbn;
@@ -1416,17 +1414,19 @@ static bool is_dsc_common_config_possible(struct dc_stream_state *stream,
 
 	return bw_range->max_target_bpp_x16 && bw_range->min_target_bpp_x16;
 }
+#endif /* CONFIG_DRM_AMD_DC_DCN */
 
 enum dc_status dm_dp_mst_is_port_support_mode(
 	struct amdgpu_dm_connector *aconnector,
 	struct dc_stream_state *stream)
 {
+	int bpp, pbn, branch_max_throughput_mps = 0;
+#if defined(CONFIG_DRM_AMD_DC_DCN)
 	struct dc_link_settings cur_link_settings;
 	unsigned int end_to_end_bw_in_kbps = 0;
 	unsigned int upper_link_bw_in_kbps = 0, down_link_bw_in_kbps = 0;
 	unsigned int max_compressed_bw_in_kbps = 0;
 	struct dc_dsc_bw_range bw_range = {0};
-	int bpp, pbn, branch_max_throughput_mps = 0;
 
 	/*
 	 * check if the mode could be supported if DSC pass-through is supported
@@ -1461,13 +1461,16 @@ enum dc_status dm_dp_mst_is_port_support_mode(
 			return DC_FAIL_BANDWIDTH_VALIDATE;
 		}
 	} else {
+#endif
 		/* check if mode could be supported within full_pbn */
 		bpp = convert_dc_color_depth_into_bpc(stream->timing.display_color_depth) * 3;
 		pbn = drm_dp_calc_pbn_mode(stream->timing.pix_clk_100hz / 10, bpp, false);
 
 		if (pbn > aconnector->port->full_pbn)
 			return DC_FAIL_BANDWIDTH_VALIDATE;
+#if defined(CONFIG_DRM_AMD_DC_DCN)
 	}
+#endif
 
 	/* check is mst dsc output bandwidth branch_overall_throughput_0_mps */
 	switch (stream->timing.pixel_encoding) {
-- 
2.37.1

Re: [PATCH v2] drm/amd/display: fix DSC related non-x86/PPC64 compilation issue

[Sudip Mukherjee]

On Thu, Aug 11, 2022 at 7:00 PM Hamza Mahfooz <hamza.mahfooz@amd.com> wrote:
>
> Need to protect DSC code with CONFIG_DRM_AMD_DC_DCN.
> Fixes the following build errors on arm64:
> ERROR: modpost: "dc_dsc_get_policy_for_timing" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
> ERROR: modpost: "dc_dsc_compute_bandwidth_range" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
>
> Fixes: 0087990a9f57 ("drm/amd/display: consider DSC pass-through during mode validation")
> Reported-by: Anders Roxell <anders.roxell@linaro.org>
> Signed-off-by: Hamza Mahfooz <hamza.mahfooz@amd.com>

Thanks, fixes the build failure for me,
Tested-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>


-- 
Regards
Sudip

Re: [PATCH v2] drm/amd/display: fix DSC related non-x86/PPC64 compilation issue

[Anders Roxell]

On Thu, 11 Aug 2022 at 20:00, Hamza Mahfooz <hamza.mahfooz@amd.com> wrote:
>
> Need to protect DSC code with CONFIG_DRM_AMD_DC_DCN.
> Fixes the following build errors on arm64:
> ERROR: modpost: "dc_dsc_get_policy_for_timing" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
> ERROR: modpost: "dc_dsc_compute_bandwidth_range" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
>
> Fixes: 0087990a9f57 ("drm/amd/display: consider DSC pass-through during mode validation")
> Reported-by: Anders Roxell <anders.roxell@linaro.org>
> Signed-off-by: Hamza Mahfooz <hamza.mahfooz@amd.com>

Thank you for the quick fix.

Tested-by: Anders Roxell <anders.roxell@linaro.org>

Cheers,
Anders

> ---
> v2: Fix WERROR build failure by guarding unused variables
> ---
>  .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c  | 9 ++++++---
>  1 file changed, 6 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
> index ef6c94cd852b..ce6929224a6e 100644
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
> @@ -1387,8 +1387,6 @@ bool pre_validate_dsc(struct drm_atomic_state *state,
>         return (ret == 0);
>  }
>
> -#endif
> -
>  static unsigned int kbps_from_pbn(unsigned int pbn)
>  {
>         unsigned int kbps = pbn;
> @@ -1416,17 +1414,19 @@ static bool is_dsc_common_config_possible(struct dc_stream_state *stream,
>
>         return bw_range->max_target_bpp_x16 && bw_range->min_target_bpp_x16;
>  }
> +#endif /* CONFIG_DRM_AMD_DC_DCN */
>
>  enum dc_status dm_dp_mst_is_port_support_mode(
>         struct amdgpu_dm_connector *aconnector,
>         struct dc_stream_state *stream)
>  {
> +       int bpp, pbn, branch_max_throughput_mps = 0;
> +#if defined(CONFIG_DRM_AMD_DC_DCN)
>         struct dc_link_settings cur_link_settings;
>         unsigned int end_to_end_bw_in_kbps = 0;
>         unsigned int upper_link_bw_in_kbps = 0, down_link_bw_in_kbps = 0;
>         unsigned int max_compressed_bw_in_kbps = 0;
>         struct dc_dsc_bw_range bw_range = {0};
> -       int bpp, pbn, branch_max_throughput_mps = 0;
>
>         /*
>          * check if the mode could be supported if DSC pass-through is supported
> @@ -1461,13 +1461,16 @@ enum dc_status dm_dp_mst_is_port_support_mode(
>                         return DC_FAIL_BANDWIDTH_VALIDATE;
>                 }
>         } else {
> +#endif
>                 /* check if mode could be supported within full_pbn */
>                 bpp = convert_dc_color_depth_into_bpc(stream->timing.display_color_depth) * 3;
>                 pbn = drm_dp_calc_pbn_mode(stream->timing.pix_clk_100hz / 10, bpp, false);
>
>                 if (pbn > aconnector->port->full_pbn)
>                         return DC_FAIL_BANDWIDTH_VALIDATE;
> +#if defined(CONFIG_DRM_AMD_DC_DCN)
>         }
> +#endif
>
>         /* check is mst dsc output bandwidth branch_overall_throughput_0_mps */
>         switch (stream->timing.pixel_encoding) {
> --
> 2.37.1
>

Re: [PATCH v2] drm/amd/display: fix DSC related non-x86/PPC64 compilation issue

[Alex Deucher]

On Thu, Aug 11, 2022 at 2:00 PM Hamza Mahfooz <hamza.mahfooz@amd.com> wrote:
>
> Need to protect DSC code with CONFIG_DRM_AMD_DC_DCN.
> Fixes the following build errors on arm64:
> ERROR: modpost: "dc_dsc_get_policy_for_timing" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
> ERROR: modpost: "dc_dsc_compute_bandwidth_range" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
>
> Fixes: 0087990a9f57 ("drm/amd/display: consider DSC pass-through during mode validation")
> Reported-by: Anders Roxell <anders.roxell@linaro.org>
> Signed-off-by: Hamza Mahfooz <hamza.mahfooz@amd.com>

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>

> ---
> v2: Fix WERROR build failure by guarding unused variables
> ---
>  .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c  | 9 ++++++---
>  1 file changed, 6 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
> index ef6c94cd852b..ce6929224a6e 100644
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
> @@ -1387,8 +1387,6 @@ bool pre_validate_dsc(struct drm_atomic_state *state,
>         return (ret == 0);
>  }
>
> -#endif
> -
>  static unsigned int kbps_from_pbn(unsigned int pbn)
>  {
>         unsigned int kbps = pbn;
> @@ -1416,17 +1414,19 @@ static bool is_dsc_common_config_possible(struct dc_stream_state *stream,
>
>         return bw_range->max_target_bpp_x16 && bw_range->min_target_bpp_x16;
>  }
> +#endif /* CONFIG_DRM_AMD_DC_DCN */
>
>  enum dc_status dm_dp_mst_is_port_support_mode(
>         struct amdgpu_dm_connector *aconnector,
>         struct dc_stream_state *stream)
>  {
> +       int bpp, pbn, branch_max_throughput_mps = 0;
> +#if defined(CONFIG_DRM_AMD_DC_DCN)
>         struct dc_link_settings cur_link_settings;
>         unsigned int end_to_end_bw_in_kbps = 0;
>         unsigned int upper_link_bw_in_kbps = 0, down_link_bw_in_kbps = 0;
>         unsigned int max_compressed_bw_in_kbps = 0;
>         struct dc_dsc_bw_range bw_range = {0};
> -       int bpp, pbn, branch_max_throughput_mps = 0;
>
>         /*
>          * check if the mode could be supported if DSC pass-through is supported
> @@ -1461,13 +1461,16 @@ enum dc_status dm_dp_mst_is_port_support_mode(
>                         return DC_FAIL_BANDWIDTH_VALIDATE;
>                 }
>         } else {
> +#endif
>                 /* check if mode could be supported within full_pbn */
>                 bpp = convert_dc_color_depth_into_bpc(stream->timing.display_color_depth) * 3;
>                 pbn = drm_dp_calc_pbn_mode(stream->timing.pix_clk_100hz / 10, bpp, false);
>
>                 if (pbn > aconnector->port->full_pbn)
>                         return DC_FAIL_BANDWIDTH_VALIDATE;
> +#if defined(CONFIG_DRM_AMD_DC_DCN)
>         }
> +#endif
>
>         /* check is mst dsc output bandwidth branch_overall_throughput_0_mps */
>         switch (stream->timing.pixel_encoding) {
> --
> 2.37.1
>

Re: build failure of next-20220811 due to b1a63a0b48ad ("drm/amd/display: consider DSC pass-through during mode validation")

[Stephen Rothwell]

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Hi all,

On Thu, 11 Aug 2022 18:10:48 +0100 "Sudip Mukherjee (Codethink)" <sudipm.mukherjee@gmail.com> wrote:
>
> Not sure if it has been reported, builds of riscv, alpha, s390, arm,
> arm64, xtensa, mips, csky allmodconfig have failed to build next-20220811
> with the error:
> 
> ERROR: modpost: "dc_dsc_compute_bandwidth_range" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
> ERROR: modpost: "dc_dsc_get_policy_for_timing" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
> 
> git bisect pointed to b1a63a0b48ad ("drm/amd/display: consider DSC pass-through during mode validation")
> And, reverting that commit has fixed the build failure.
> 
> I will be happy to test any patch or provide any extra log if needed.

I have reverted that commit in today's linux-next.

-- 
Cheers,
Stephen Rothwell

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Re: build failure of next-20220811 due to b1a63a0b48ad ("drm/amd/display: consider DSC pass-through during mode validation")

[Stephen Rothwell]

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Hi all,

On Fri, 12 Aug 2022 09:07:31 +1000 Stephen Rothwell <sfr@rothwell.id.au> wrote:
>
> On Thu, 11 Aug 2022 18:10:48 +0100 "Sudip Mukherjee (Codethink)" <sudipm.mukherjee@gmail.com> wrote:
> >
> > Not sure if it has been reported, builds of riscv, alpha, s390, arm,
> > arm64, xtensa, mips, csky allmodconfig have failed to build next-20220811
> > with the error:
> > 
> > ERROR: modpost: "dc_dsc_compute_bandwidth_range" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
> > ERROR: modpost: "dc_dsc_get_policy_for_timing" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
> > 
> > git bisect pointed to b1a63a0b48ad ("drm/amd/display: consider DSC pass-through during mode validation")
> > And, reverting that commit has fixed the build failure.
> > 
> > I will be happy to test any patch or provide any extra log if needed.  
> 
> I have reverted that commit in today's linux-next.

I have removed that revert.  Sudip, can you recheck when linux-next is
released, please?

-- 
Cheers,
Stephen Rothwell

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Re: build failure of next-20220811 due to b1a63a0b48ad ("drm/amd/display: consider DSC pass-through during mode validation")

[Sudip Mukherjee]

On Wed, Aug 17, 2022 at 12:43 AM Stephen Rothwell <sfr@canb.auug.org.au> wrote:
>
> Hi all,
>
> On Fri, 12 Aug 2022 09:07:31 +1000 Stephen Rothwell <sfr@rothwell.id.au> wrote:
> >
> > On Thu, 11 Aug 2022 18:10:48 +0100 "Sudip Mukherjee (Codethink)" <sudipm.mukherjee@gmail.com> wrote:
> > >
> > > Not sure if it has been reported, builds of riscv, alpha, s390, arm,
> > > arm64, xtensa, mips, csky allmodconfig have failed to build next-20220811
> > > with the error:
> > >
> > > ERROR: modpost: "dc_dsc_compute_bandwidth_range" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
> > > ERROR: modpost: "dc_dsc_get_policy_for_timing" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
> > >
> > > git bisect pointed to b1a63a0b48ad ("drm/amd/display: consider DSC pass-through during mode validation")
> > > And, reverting that commit has fixed the build failure.
> > >
> > > I will be happy to test any patch or provide any extra log if needed.
> >
> > I have reverted that commit in today's linux-next.
>
> I have removed that revert.  Sudip, can you recheck when linux-next is
> released, please?

The build failure is not seen with next-20220817.


-- 
Regards
Sudip

Re: build failure of next-20220811 due to b1a63a0b48ad ("drm/amd/display: consider DSC pass-through during mode validation")

[Stephen Rothwell]

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Hi Sudip,

On Wed, 17 Aug 2022 21:39:17 +0100 Sudip Mukherjee <sudipm.mukherjee@gmail.com> wrote:
>
> On Wed, Aug 17, 2022 at 12:43 AM Stephen Rothwell <sfr@canb.auug.org.au> wrote:
> >
> > On Fri, 12 Aug 2022 09:07:31 +1000 Stephen Rothwell <sfr@rothwell.id.au> wrote:  
> > >
> > > On Thu, 11 Aug 2022 18:10:48 +0100 "Sudip Mukherjee (Codethink)" <sudipm.mukherjee@gmail.com> wrote:  
> > > >
> > > > Not sure if it has been reported, builds of riscv, alpha, s390, arm,
> > > > arm64, xtensa, mips, csky allmodconfig have failed to build next-20220811
> > > > with the error:
> > > >
> > > > ERROR: modpost: "dc_dsc_compute_bandwidth_range" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
> > > > ERROR: modpost: "dc_dsc_get_policy_for_timing" [drivers/gpu/drm/amd/amdgpu/amdgpu.ko] undefined!
> > > >
> > > > git bisect pointed to b1a63a0b48ad ("drm/amd/display: consider DSC pass-through during mode validation")
> > > > And, reverting that commit has fixed the build failure.
> > > >
> > > > I will be happy to test any patch or provide any extra log if needed.  
> > >
> > > I have reverted that commit in today's linux-next.  
> >
> > I have removed that revert.  Sudip, can you recheck when linux-next is
> > released, please?  
> 
> The build failure is not seen with next-20220817.

Excellent, thanks.

-- 
Cheers,
Stephen Rothwell

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