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| author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2011-09-28 05:57:23 -0400 |
|---|---|---|
| committer | Keith Packard <keithp@keithp.com> | 2011-10-20 18:26:17 -0400 |
| commit | 24dd85ff723f142093f44244764b9b5c152235b8 (patch) | |
| tree | 142aaa2cf68b307e584ed1ba9f40a951ae46828c /include/linux/backing-dev.h | |
| parent | 8ffc02468145ac92b1b88896e0f18bd7bcd52591 (diff) | |
io-mapping: ensure io_mapping_map_atomic _is_ atomic
For the !HAVE_ATOMIC_IOMAP case the stub functions did not call
pagefault_disable/_enable. The i915 driver relies on the map
actually being atomic, otherwise it can deadlock with it's own
pagefault handler in the gtt pwrite fastpath.
This is exercised by gem_mmap_gtt from the intel-gpu-toosl gem
testsuite.
v2: Chris Wilson noted the lack of an include.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=38115
Cc: stable@kernel.org
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Keith Packard <keithp@keithp.com>
Diffstat (limited to 'include/linux/backing-dev.h')
0 files changed, 0 insertions, 0 deletions