[PATCH 4.9 091/109] dma-buf/sw-sync: Reduce irqsave/irqrestore from known context

4.9-stable review patch. If anyone has any objections, please let me know. -- From: Chris Wilson commit a6aa8fca4d792c72947e341d7842d2f700534335 upstream. If we know the context under which we are called, then we can use the simpler form of

[PATCH 4.9 091/109] dma-buf/sw-sync: Reduce irqsave/irqrestore from known context

4.9-stable review patch. If anyone has any objections, please let me know. -- From: Chris Wilson commit a6aa8fca4d792c72947e341d7842d2f700534335 upstream. If we know the context under which we are called, then we can use the simpler form of spin_lock_irq (saving the