linux-kernel - Re: [PULL] gvt-next

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Message-ID: <e245c195-fdb0-32c4-dcfb-8ff49bc3a63c@intel.com>
Date:   Tue, 26 Apr 2022 16:58:33 +0000
From:   "Wang, Zhi A" <zhi.a.wang@...el.com>
To:     Jason Gunthorpe <jgg@...dia.com>
CC:     Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "intel-gfx@...ts.freedesktop.org" <intel-gfx@...ts.freedesktop.org>,
        "Joonas Lahtinen" <joonas.lahtinen@...ux.intel.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Alex Williamson <alex.williamson@...hat.com>,
        Zhenyu Wang <zhenyuw@...ux.intel.com>,
        "Vivi, Rodrigo" <rodrigo.vivi@...el.com>,
        "intel-gvt-dev@...ts.freedesktop.org" 
        <intel-gvt-dev@...ts.freedesktop.org>,
        Christoph Hellwig <hch@....de>
Subject: Re: [PULL] gvt-next

On 4/26/22 3:53 PM, Jason Gunthorpe wrote:
> On Tue, Apr 26, 2022 at 07:58:59AM +0000, Wang, Zhi A wrote:
>> Hi folks:
>>
>> Here is the pull of gvt-next which fixs the compilation error when i915 debug
>> is open after the GVT-g refactor patches.
>>
>> Thanks so much for the efforts.
>>
>> Thanks,
>> Zhi.
>>
>> The following changes since commit 2917f53113be3b7a0f374e02cebe6d6b749366b5:
>>
>>   vfio/mdev: Remove mdev drvdata (2022-04-21 07:36:56 -0400)
>>
>> are available in the Git repository at:
>>
>>   https://github.com/intel/gvt-linux tags/gvt-next-2022-04-26
>>
>> for you to fetch changes up to 2da299cee780ea797b3f72558687868072cf5eb5:
>>
>>   drm/i915/gvt: Add missing export of symbols. (2022-04-25 18:03:04 -0400)
>>
>> gvt-next-2022-04-26
>>
>> - Add two missing exports of symbols when i915 debug is enabled.
>>
>> Zhi Wang (1):
>>       drm/i915/gvt: Add missing export of symbols.
>>
>>  drivers/gpu/drm/i915/intel_gvt.c | 2 ++
>>  1 file changed, 2 insertions(+)
> 
> This still has another compile problem:
> 
> ERROR: modpost: "intel_runtime_pm_put" [vmlinux] is a static EXPORT_SYMBOL_GPL
> 
> Because:
> 
> #if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)
> void intel_runtime_pm_put(struct intel_runtime_pm *rpm, intel_wakeref_t wref);
> #else
> static inline void
> intel_runtime_pm_put(struct intel_runtime_pm *rpm, intel_wakeref_t wref)
> {
>         intel_runtime_pm_put_unchecked(rpm);
> }
> #endif
> 
> Looks like it happens if CONFIG_DRM_I915_DEBUG_RUNTIME_PM=n
> 
> I think you probably want to #ifdef the export in the same way:
> 
> --- a/drivers/gpu/drm/i915/intel_gvt.c
> +++ b/drivers/gpu/drm/i915/intel_gvt.c
> @@ -309,7 +309,9 @@ EXPORT_SYMBOL_NS_GPL(__intel_context_do_pin, I915_GVT);
>  EXPORT_SYMBOL_NS_GPL(__intel_context_do_unpin, I915_GVT);
>  EXPORT_SYMBOL_NS_GPL(intel_ring_begin, I915_GVT);
>  EXPORT_SYMBOL_NS_GPL(intel_runtime_pm_get, I915_GVT);
> +#if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)
>  EXPORT_SYMBOL_NS_GPL(intel_runtime_pm_put, I915_GVT);
> +#endif
Sigh. That's tricky. Let me prepare another one. 
>  EXPORT_SYMBOL_NS_GPL(intel_runtime_pm_put_unchecked, I915_GVT);
>  EXPORT_SYMBOL_NS_GPL(intel_uncore_forcewake_for_reg, I915_GVT);
>  EXPORT_SYMBOL_NS_GPL(intel_uncore_forcewake_get, I915_GVT);
> 
> Jason
>