Pull swiotlb updates from Konrad Rzeszutek Wilk:
 "Expands the SWIOTLB to have debugfs support (along with bug-fixes),
  and a tiny fix"

* 'stable/for-linus-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb:
  swiotlb: drop pointless static qualifier in swiotlb_create_debugfs()
  swiotlb: checking whether swiotlb buffer is full with io_tlb_used
  swiotlb: add debugfs to track swiotlb buffer usage
  swiotlb: fix comment on swiotlb_bounce()