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| author | Paul Mackerras <paulus@samba.org> | 2009-04-22 05:02:09 +0200 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2009-04-22 05:02:09 +0200 |
| commit | 5bd3ef84d73c2ea7b4babbad060909753c4828d4 (patch) | |
| tree | fdf2bafb48ae1ed03175f6c77a7548a181e69ee9 /drivers/mtd/chips/map_ram.c | |
| parent | powerpc/85xx: Remove defconfigs that mpc85xx_{smp_}defconfig cover (diff) | |
| parent | powerpc: Fix of_node_put() exit path in of_irq_map_one() (diff) | |
| download | linux-5bd3ef84d73c2ea7b4babbad060909753c4828d4.tar.xz linux-5bd3ef84d73c2ea7b4babbad060909753c4828d4.zip | |
Merge branch 'merge' of git://git.secretlab.ca/git/linux-2.6 into merge
Diffstat (limited to 'drivers/mtd/chips/map_ram.c')
| -rw-r--r-- | drivers/mtd/chips/map_ram.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/mtd/chips/map_ram.c b/drivers/mtd/chips/map_ram.c index 072dd8abf33a..6bdc50c727e7 100644 --- a/drivers/mtd/chips/map_ram.c +++ b/drivers/mtd/chips/map_ram.c @@ -21,6 +21,8 @@ static int mapram_write (struct mtd_info *, loff_t, size_t, size_t *, const u_ch static int mapram_erase (struct mtd_info *, struct erase_info *); static void mapram_nop (struct mtd_info *); static struct mtd_info *map_ram_probe(struct map_info *map); +static unsigned long mapram_unmapped_area(struct mtd_info *, unsigned long, + unsigned long, unsigned long); static struct mtd_chip_driver mapram_chipdrv = { @@ -64,6 +66,7 @@ static struct mtd_info *map_ram_probe(struct map_info *map) mtd->type = MTD_RAM; mtd->size = map->size; mtd->erase = mapram_erase; + mtd->get_unmapped_area = mapram_unmapped_area; mtd->read = mapram_read; mtd->write = mapram_write; mtd->sync = mapram_nop; @@ -79,6 +82,20 @@ static struct mtd_info *map_ram_probe(struct map_info *map) } +/* + * Allow NOMMU mmap() to directly map the device (if not NULL) + * - return the address to which the offset maps + * - return -ENOSYS to indicate refusal to do the mapping + */ +static unsigned long mapram_unmapped_area(struct mtd_info *mtd, + unsigned long len, + unsigned long offset, + unsigned long flags) +{ + struct map_info *map = mtd->priv; + return (unsigned long) map->virt + offset; +} + static int mapram_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf) { struct map_info *map = mtd->priv; |