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<body><span class="vcard"><a class="email" href="mailto:huax.lu@intel.com" title="lu hua <huax.lu@intel.com>"> <span class="fn">lu hua</span></a>
</span> changed
<a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED --- - [BDW Bisected]BUG: unable to handle kernel paging request at ffffc900110a0000"
href="https://bugs.freedesktop.org/show_bug.cgi?id=78274">bug 78274</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Status</td>
<td>NEEDINFO
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<td>ASSIGNED
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<b><a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED --- - [BDW Bisected]BUG: unable to handle kernel paging request at ffffc900110a0000"
href="https://bugs.freedesktop.org/show_bug.cgi?id=78274#c7">Comment # 7</a>
on <a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED --- - [BDW Bisected]BUG: unable to handle kernel paging request at ffffc900110a0000"
href="https://bugs.freedesktop.org/show_bug.cgi?id=78274">bug 78274</a>
from <span class="vcard"><a class="email" href="mailto:huax.lu@intel.com" title="lu hua <huax.lu@intel.com>"> <span class="fn">lu hua</span></a>
</span></b>
<pre>(In reply to <a href="show_bug.cgi?id=78274#c6">comment #6</a>)
<span class="quote">> Please test this while I think more:
> diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c
> b/drivers/gpu/drm/i915/intel_ringbuffer.c
> index 40a7aa4..1371bf6 100644
> --- a/drivers/gpu/drm/i915/intel_ringbuffer.c
> +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
> @@ -717,6 +717,9 @@ gen6_add_request(struct intel_ring_buffer *ring)
> {
> int ret;
>
> + if (!i915_semaphore_is_enabled(dev))
> + return 0;
> +
> ret = ring->semaphore.signal(ring, 4);
> if (ret)
> return ret;</span >
Apply this patch, make fail.
CC [M] drivers/gpu/drm/i915/intel_ringbuffer.o
drivers/gpu/drm/i915/intel_ringbuffer.c: In function ‘gen6_add_request’:
drivers/gpu/drm/i915/intel_ringbuffer.c:720:33: error: ‘dev’ undeclared
(first use in this function)
drivers/gpu/drm/i915/intel_ringbuffer.c:720:33: note: each undeclared
identifier is reported only once for each function it appears in
make[4]: *** [drivers/gpu/drm/i915/intel_ringbuffer.o] Error 1
make[3]: *** [drivers/gpu/drm/i915] Error 2
make[2]: *** [drivers/gpu/drm] Error 2
make[1]: *** [drivers/gpu] Error 2
make: *** [drivers] Error 2
Run ./gem_exec_nop --run-subtest render, it can reproduce the bisect result.</pre>
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