dma-buf/sw-sync: Reduce irqsave/irqrestore from known context
If we know the context under which we are called, then we can use the simpler form of spin_lock_irq (saving the save/restore). Signed-off-by: NChris 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: NSean Paul <seanpaul@chromium.org> Signed-off-by: NGustavo Padovan <gustavo.padovan@collabora.com> Link: http://patchwork.freedesktop.org/patch/msgid/20170629125930.821-4-chris@chris-wilson.co.uk
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