Hi all, i915 has some reason to want to avoid the track_pfn_remap overhead in remap_pfn_range. Add a function to the core VM to do just that rather than reinventing the functionality poorly in the driver. Note that the remap_io_sg path does get exercises when using Xorg on my Thinkpad X1, so this should be considered lightly tested, I've not managed to hit the remap_io_mapping path at all. Diffstat: drivers/gpu/drm/i915/i915_mm.c | 101 ++++++++++------------------------------- include/linux/mm.h | 2 mm/memory.c | 52 ++++++++++++--------- 3 files changed, 60 insertions(+), 95 deletions(-)
