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authorDavid Howells <dhowells@redhat.com>2009-02-12 10:40:00 +0000
committerDavid Woodhouse <David.Woodhouse@intel.com>2009-03-24 09:00:19 +0000
commit402d326519c1a4859c527702383f4e60f606ef52 (patch)
treebeb302d56d7671d372ae73f2664feed2a5b1226d /drivers/mtd/mtdpart.c
parent9ce969082e490d0a5a81862b364337c93dc3482a (diff)
downloadblackbird-op-linux-402d326519c1a4859c527702383f4e60f606ef52.tar.gz
blackbird-op-linux-402d326519c1a4859c527702383f4e60f606ef52.zip
NOMMU: Present backing device capabilities for MTD chardevs
Present backing device capabilities for MTD character device files to allow NOMMU mmap to do direct mapping where possible. Signed-off-by: David Howells <dhowells@redhat.com> Tested-by: Bernd Schmidt <bernd.schmidt@analog.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/mtd/mtdpart.c')
-rw-r--r--drivers/mtd/mtdpart.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/mtd/mtdpart.c b/drivers/mtd/mtdpart.c
index 144e6b613a77..06d5b9d8853a 100644
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -84,6 +84,18 @@ static void part_unpoint(struct mtd_info *mtd, loff_t from, size_t len)
part->master->unpoint(part->master, from + part->offset, len);
}
+static unsigned long part_get_unmapped_area(struct mtd_info *mtd,
+ unsigned long len,
+ unsigned long offset,
+ unsigned long flags)
+{
+ struct mtd_part *part = PART(mtd);
+
+ offset += part->offset;
+ return part->master->get_unmapped_area(part->master, len, offset,
+ flags);
+}
+
static int part_read_oob(struct mtd_info *mtd, loff_t from,
struct mtd_oob_ops *ops)
{
@@ -342,6 +354,7 @@ static struct mtd_part *add_one_partition(struct mtd_info *master,
slave->mtd.name = part->name;
slave->mtd.owner = master->owner;
+ slave->mtd.backing_dev_info = master->backing_dev_info;
slave->mtd.read = part_read;
slave->mtd.write = part_write;
@@ -354,6 +367,8 @@ static struct mtd_part *add_one_partition(struct mtd_info *master,
slave->mtd.unpoint = part_unpoint;
}
+ if (master->get_unmapped_area)
+ slave->mtd.get_unmapped_area = part_get_unmapped_area;
if (master->read_oob)
slave->mtd.read_oob = part_read_oob;
if (master->write_oob)
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