Chris Wilson db9f9203e2 drm/i915/userptr: Hold mmref whilst calling get-user-pages ... Holding a reference to the containing task_struct is not sufficient to prevent the mm_struct from being reaped under memory pressure. If this happens whilst we are calling get_user_pages(), explosions erupt - sometimes an immediate GPF, sometimes page flag corruption. To prevent the target mm from being reaped as we are reading from it, acquire a reference before we begin. Testcase: igt/gem_shrink/*userptr Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Cc: Michał Winiarski <michal.winiarski@intel.com> Cc: stable@vger.kernel.org Reviewed-by: Michał Winiarski <michal.winiarski@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1459864801-28606-2-git-send-email-chris@chris-wilson.co.uk (cherry picked from commit 40313f0cd0) Signed-off-by: Jani Nikula <jani.nikula@intel.com>		2016-04-18 12:35:49 +03:00
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drm	drm/i915/userptr: Hold mmref whilst calling get-user-pages	2016-04-18 12:35:49 +03:00
host1x	Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux	2016-03-21 13:48:00 -07:00
ipu-v3	gpu: ipu-v3: ipu-dmfc: Rename ipu_dmfc_init_channel to ipu_dmfc_config_wait4eot	2016-03-31 11:24:33 +02:00
vga	vga_switcheroo: Add support for switching only the DDC	2016-02-09 11:21:07 +01:00
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