Hey Linus, Please git pull the following tag: git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb.git stable/for-linus-3.16-rc1-tag which has one bug-fix that had been in tree for quite some time. We had assumed that the physical address zero was invalid and would fail it. But that is not true and on some architectures it is not reserved and valid. This fixes it. Please pull! lib/swiotlb.c | 28 ++++++++++++++++++---------- 1 file changed, 18 insertions(+), 10 deletions(-) Jan Beulich (1): swiotlb: don't assume PA 0 is invalid