diff options
| author | David Howells <dhowells@redhat.com> | 2009-02-12 10:40:00 +0000 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2009-03-24 09:00:19 +0000 |
| commit | 402d326519c1a4859c527702383f4e60f606ef52 (patch) | |
| tree | beb302d56d7671d372ae73f2664feed2a5b1226d /drivers/mtd/mtdpart.c | |
| parent | 9ce969082e490d0a5a81862b364337c93dc3482a (diff) | |
| download | lwn-402d326519c1a4859c527702383f4e60f606ef52.tar.gz lwn-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.c | 15 |
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) |