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    <head>
      <base href="https://bugs.freedesktop.org/" />
    </head>
    <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_NEW "
   title="NEW - [all bisected]system hang and BUG: unable to handle kernel NULL pointer dereference at 0000000000000084 when kill X"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=89388">bug 89388</a>
          <br>
             <table border="1" cellspacing="0" cellpadding="8">
          <tr>
            <th>What</th>
            <th>Removed</th>
            <th>Added</th>
          </tr>

         <tr>
           <td style="text-align:right;">Keywords</td>
           <td>bisect_pending
           </td>
           <td>
                
           </td>
         </tr>

         <tr>
           <td style="text-align:right;">Status</td>
           <td>NEEDINFO
           </td>
           <td>NEW
           </td>
         </tr>

         <tr>
           <td style="text-align:right;">Assignee</td>
           <td>intel-gfx-bugs@lists.freedesktop.org
           </td>
           <td>matthew.d.roper@intel.com
           </td>
         </tr>

         <tr>
           <td style="text-align:right;">Summary</td>
           <td>[all regression]system hang and BUG: unable to handle kernel NULL pointer dereference at 0000000000000084 when kill X
           </td>
           <td>[all bisected]system hang and BUG: unable to handle kernel NULL pointer dereference at 0000000000000084 when kill X
           </td>
         </tr></table>
      <p>
        <div>
            <b><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [all bisected]system hang and BUG: unable to handle kernel NULL pointer dereference at 0000000000000084 when kill X"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=89388#c3">Comment # 3</a>
              on <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [all bisected]system hang and BUG: unable to handle kernel NULL pointer dereference at 0000000000000084 when kill X"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=89388">bug 89388</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>Bisect shows: fd2d61341bf39d1054256c07d6eddd624ebc4241 is the first bad commit
commit fd2d61341bf39d1054256c07d6eddd624ebc4241
Author:     Matt Roper <<a href="mailto:matthew.d.roper@intel.com">matthew.d.roper@intel.com</a>>
AuthorDate: Fri Feb 27 10:12:01 2015 -0800
Commit:     Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>>
CommitDate: Fri Feb 27 19:56:17 2015 +0100

    drm/i915: Use plane->state->fb in watermark code (v2)

    plane->fb is a legacy pointer that not always be up-to-date (or updated
    early enough).  Make sure the watermark code uses plane->state->fb so
    that we're always doing our calculations based on the correct
    framebuffers.

    This patch was generated by Coccinelle with the following semantic
    patch:

            @@
            struct drm_plane *P;
            @@
            - P->fb
            + P->state->fb

    v2: Rebase

    Signed-off-by: Matt Roper <<a href="mailto:matthew.d.roper@intel.com">matthew.d.roper@intel.com</a>>
    Signed-off-by: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>>

Revert this commit, this issue goes away.</pre>
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