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drm/amdgpu: Replace rcu_assign_pointer() with RCU_INIT_POINTER()

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The rcu_assign_pointer() ensures that the initialization of a structure
is carried out before storing a pointer to that structre. It is always
safe to use RCU_INIT_POINTER() to NULL a pointer, instead of
rcu_assign_pointer().
This results in slightly smaller/faster code.

The following semantic patch was used:
<smpl>

@@
@@

- rcu_assign_pointer
+ RCU_INIT_POINTER
  (..., NULL)

</smpl>

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Muhammad Falak R Wani <falakreyaz@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Muhammad Falak R Wani 2016-05-01 00:30:24 +05:30 committed by Alex Deucher
parent 6b8812eb00
commit 84fae133f0
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
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@ -198,7 +198,7 @@ void amdgpu_fence_process(struct amdgpu_ring *ring)
/* There is always exactly one thread signaling this fence slot */
fence = rcu_dereference_protected(*ptr, 1);
rcu_assign_pointer(*ptr, NULL);
RCU_INIT_POINTER(*ptr, NULL);
BUG_ON(!fence);