Alistair Popple wrote: > GUP uses pXX_devmap() calls to see if it needs to a get a reference on > the associated pgmap data structure to ensure the pages won't go > away. However it's a driver responsibility to ensure that if pages are > mapped (ie. discoverable by GUP) that they are not offlined or removed > from the memmap so there is no need to hold a reference on the pgmap > data structure to ensure this. > > Furthermore mappings with PFN_DEV are no longer created, hence this > effectively dead code anyway so can be removed. > > Signed-off-by: Alistair Popple <apopple@xxxxxxxxxx> > --- > include/linux/huge_mm.h | 3 +- > mm/gup.c | 162 +---------------------------------------- > mm/huge_memory.c | 40 +---------- > 3 files changed, 5 insertions(+), 200 deletions(-) Hooray! Goodbye dev_pagemap mess in gup.c. Reviewed-by: Dan Williams <dan.j.williams@xxxxxxxxx>
