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authorChristoph Hellwig <hch@lst.de>2021-04-29 22:57:32 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2021-04-30 11:20:39 -0700
commit1fbaf8fc12a0136c7e62e7ad6fe886fe1749912c (patch)
tree272f224698d871cd2ff65a5fc1fefb02de87fbcc /include
parent74ffa5a3e68504dd289135b1cf0422c19ffb3f2e (diff)
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>
Diffstat (limited to 'include')
-rw-r--r--include/linux/io-mapping.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/io-mapping.h b/include/linux/io-mapping.h
index c093e81310a9..e9743cfd8585 100644
--- a/include/linux/io-mapping.h
+++ b/include/linux/io-mapping.h
@@ -220,3 +220,6 @@ io_mapping_free(struct io_mapping *iomap)
}
#endif /* _LINUX_IO_MAPPING_H */
+
+int io_mapping_map_user(struct io_mapping *iomap, struct vm_area_struct *vma,
+ unsigned long addr, unsigned long pfn, unsigned long size);