[PATCH 0/4] dma-buf: Silence dma_fence __rcu sparse warnings

Ville Syrjala ville.syrjala at linux.intel.com
Thu Nov 2 20:03:32 UTC 2017


From: Ville Syrjälä <ville.syrjala at linux.intel.com>

When building drm+i915 I get around 150 lines of sparse noise from 
dma_fence __rcu warnings. This series eliminates all of that.

The first two patches were already posted by Chris, but there wasn't
any real reaction, so I figured I'd repost with a wider Cc list.

As for the other two patches, I'm no expert on dma_fence and I didn't
spend a lot of time looking at it so I can't be sure I annotated all
the accesses correctly. But I figured someone will scream at me if
I got it wrong ;)

Cc: Dave Airlie <airlied at redhat.com>
Cc: Jason Ekstrand <jason at jlekstrand.net>
Cc: linaro-mm-sig at lists.linaro.org
Cc: linux-media at vger.kernel.org
Cc: Alex Deucher <alexander.deucher at amd.com>
Cc: Christian König <christian.koenig at amd.com>
Cc: Sumit Semwal <sumit.semwal at linaro.org>
Cc: Chris Wilson <chris at chris-wilson.co.uk>

Chris Wilson (2):
  drm/syncobj: Mark up the fence as an RCU protected pointer
  dma-buf/fence: Sparse wants __rcu on the object itself

Ville Syrjälä (2):
  drm/syncobj: Use proper methods for accessing rcu protected pointers
  dma-buf: Use rcu_assign_pointer() to set rcu protected pointers

 drivers/dma-buf/reservation.c |  2 +-
 drivers/gpu/drm/drm_syncobj.c | 11 +++++++----
 include/drm/drm_syncobj.h     |  2 +-
 include/linux/dma-fence.h     |  2 +-
 4 files changed, 10 insertions(+), 7 deletions(-)

-- 
2.13.6



More information about the dri-devel mailing list