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

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Date:   Tue, 26 Apr 2022 12:53:18 -0300
From:   Jason Gunthorpe <jgg@...dia.com>
To:     "Wang, Zhi A" <zhi.a.wang@...el.com>
Cc:     Jani Nikula <jani.nikula@...ux.intel.com>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        "Vivi, Rodrigo" <rodrigo.vivi@...el.com>,
        Alex Williamson <alex.williamson@...hat.com>,
        Christoph Hellwig <hch@....de>,
        Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>,
        "intel-gvt-dev@...ts.freedesktop.org" 
        <intel-gvt-dev@...ts.freedesktop.org>,
        "intel-gfx@...ts.freedesktop.org" <intel-gfx@...ts.freedesktop.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Zhenyu Wang <zhenyuw@...ux.intel.com>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>
Subject: Re: [PULL] gvt-next

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
 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