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dma-buf/sw-sync: Use an rbtree to sort fences in the timeline
commit f1e8c67 upstream. Reduce the list iteration when incrementing the timeline by storing the fences in increasing order. v2: Prevent spinlock recursion on free during create v3: Fixup rebase conflict inside comments that escaped the compiler. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Sumit Semwal <sumit.semwal@linaro.org> Cc: Sean Paul <seanpaul@chromium.org> Cc: Gustavo Padovan <gustavo@padovan.org> Reviewed-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.com> Link: http://patchwork.freedesktop.org/patch/msgid/20170629211253.22766-1-chris@chris-wilson.co.uk [s/dma_fence/fence/g - gregkh] Cc: Jisheng Zhang <Jisheng.Zhang@synaptics.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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