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mtd: introduce mtd_writev 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 18:59:12 +02:00
committed by David Woodhouse
parent 4403dbfb45
commit b0a31f7b2a
4 changed files with 18 additions and 11 deletions
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18
include/linux/mtd/mtd.h
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@ -204,18 +204,14 @@ struct mtd_info {
size_t *retlen, u_char *buf);
int (*lock_user_prot_reg) (struct mtd_info *mtd, loff_t from,
size_t len);
int (*writev) (struct mtd_info *mtd, const struct kvec *vecs,
unsigned long count, loff_t to, size_t *retlen);
/* Backing device capabilities for this device
* - provides mmap capabilities
*/
struct backing_dev_info *backing_dev_info;
/* kvec-based read/write methods.
NB: The 'count' parameter is the number of _vectors_, each of
which contains an (ofs, len) tuple.
*/
int (*writev) (struct mtd_info *mtd, const struct kvec *vecs, unsigned long count, loff_t to, size_t *retlen);
/* Sync */
void (*sync) (struct mtd_info *mtd);
@ -375,6 +371,16 @@ static inline int mtd_lock_user_prot_reg(struct mtd_info *mtd, loff_t from,
return mtd->lock_user_prot_reg(mtd, from, len);
}
/*
* kvec-based read/write method. NB: The 'count' parameter is the number of
* _vectors_, each of which contains an (ofs, len) tuple.
*/
static inline int mtd_writev(struct mtd_info *mtd, const struct kvec *vecs,
unsigned long count, loff_t to, size_t *retlen)
{
return mtd->writev(mtd, vecs, count, to, retlen);
}
static inline struct mtd_info *dev_to_mtd(struct device *dev)
{
return dev ? dev_get_drvdata(dev) : NULL;