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authorJan Kara <jack@suse.cz>2015-07-13 17:55:44 +0300
committerMauro Carvalho Chehab <mchehab@osg.samsung.com>2015-08-16 19:02:47 +0300
commit8025e5ddf9c1cac0e632dad49a63abf7848b78cb (patch)
treefb812c2d3cf5940b714d63af0b2bc26082b5855c /mm/Kconfig
parent0f6e2825ce916eed882996bb6e9148c13ecebefd (diff)
downloadlinux-8025e5ddf9c1cac0e632dad49a63abf7848b78cb.tar.xz
[media] mm: Provide new get_vaddr_frames() helper
Provide new function get_vaddr_frames(). This function maps virtual addresses from given start and fills given array with page frame numbers of the corresponding pages. If given start belongs to a normal vma, the function grabs reference to each of the pages to pin them in memory. If start belongs to VM_IO | VM_PFNMAP vma, we don't touch page structures. Caller must make sure pfns aren't reused for anything else while he is using them. This function is created for various drivers to simplify handling of their buffers. Signed-off-by: Jan Kara <jack@suse.cz> Acked-by: Mel Gorman <mgorman@suse.de> Acked-by: Vlastimil Babka <vbabka@suse.cz> Acked-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'mm/Kconfig')
-rw-r--r--mm/Kconfig3
1 files changed, 3 insertions, 0 deletions
diff --git a/mm/Kconfig b/mm/Kconfig
index e79de2bd12cd..7f146dd32fc5 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -654,3 +654,6 @@ config DEFERRED_STRUCT_PAGE_INIT
when kswapd starts. This has a potential performance impact on
processes running early in the lifetime of the systemm until kswapd
finishes the initialisation.
+
+config FRAME_VECTOR
+ bool