Alex Waterman aa74098f29 gpu: nvgpu: Fix gk20a_sync_pt_has_signaled() ...

Fix a reentrancy problem in gk20a_sync_pt_has_signaled()
where one thread could clear a pointer before another
thread tried to access it. A spinlock was added to the
gk20a_sync_pt struct which is used to ensure that the
underyling gk20a_sync_pt data is accessed in a sane
manner.

Bug 1604892

Change-Id: I270d89def7b986405a3167285d51ceda950c7b82
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: http://git-master/r/935909
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
GVS: Gerrit_Virtual_Submit

2016-01-27 10:58:57 -08:00

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