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drm/i915: Add a spinlock to protect the active_list

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This is a baby-step in the direction of having finer-grained
locking than the struct_mutex. Specifically, this will enable
new debugging code to read the active list for printing out
GPU state when the GPU is wedged, (while the struct_mutex is
held, of course).

Signed-off-by: Carl Worth <cworth@cworth.org>
[anholt: indentation fix]
Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Carl Worth
2009-03-20 11:54:25 -07:00
committed by Eric Anholt
parent 7026d4ac1f
commit 5e118f4139
4 changed files with 29 additions and 4 deletions
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drivers/gpu/drm/i915/i915_drv.h
+1
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@@ -300,6 +300,7 @@ typedef struct drm_i915_private {
*
* A reference is held on the buffer while on this list.
*/
spinlock_t active_list_lock;
struct list_head active_list;
/**