mm: add a io_mapping_map_user helper
authorChristoph Hellwig <hch@lst.de>
Fri, 30 Apr 2021 05:57:32 +0000 (22:57 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 30 Apr 2021 18:20:39 +0000 (11:20 -0700)
commit1fbaf8fc12a0136c7e62e7ad6fe886fe1749912c
tree272f224698d871cd2ff65a5fc1fefb02de87fbcc
parent74ffa5a3e68504dd289135b1cf0422c19ffb3f2e
mm: add a io_mapping_map_user helper

Add a helper that calls remap_pfn_range for an struct io_mapping, relying
on the pgprot pre-validation done when creating the mapping instead of
doing it at runtime.

Link: https://lkml.kernel.org/r/20210326055505.1424432-3-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
include/linux/io-mapping.h
mm/Kconfig
mm/Makefile
mm/io-mapping.c [new file with mode: 0644]