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mtd: introduce mtd_get_unmapped_area interface

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Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Artem Bityutskiy
2011-12-23 17:10:15 +02:00
committed by David Woodhouse
parent 7219778ad9
commit 04c601bfa4
5 changed files with 18 additions and 11 deletions
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18
include/linux/mtd/mtd.h
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@@ -178,11 +178,6 @@ struct mtd_info {
int (*point) (struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, void **virt, resource_size_t *phys);
void (*unpoint) (struct mtd_info *mtd, loff_t from, size_t len);
/* 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
*/
unsigned long (*get_unmapped_area) (struct mtd_info *mtd,
unsigned long len,
unsigned long offset,
@@ -293,6 +288,19 @@ static inline void mtd_unpoint(struct mtd_info *mtd, loff_t from, size_t len)
return mtd->unpoint(mtd, from, len);
}
/*
* 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 inline unsigned long mtd_get_unmapped_area(struct mtd_info *mtd,
unsigned long len,
unsigned long offset,
unsigned long flags)
{
return mtd->get_unmapped_area(mtd, len, offset, flags);
}
static inline struct mtd_info *dev_to_mtd(struct device *dev)
{
return dev ? dev_get_drvdata(dev) : NULL;