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mtd: harmonize mtd_writev usage

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This patch makes the 'mtd_writev()' function more usable and logical. We first
teach it to fall-back to the 'default_mtd_writev()' function if the MTD driver
does not define its own '->writev()' method. Then we make block2mtd and JFFS2
just 'mtd_writev()' instead of 'default_mtd_writev()' function. This means we
can now stop exporting 'default_mtd_writev()' and instead, export
'mtd_writev()'. This is much cleaner and more logical, as well as allows us to
get read of another direct 'mtd->writev' access in JFFS2.

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
2011-12-30 16:23:41 +02:00
committed by David Woodhouse
parent e2936b2af5
commit 1dbebd3256
4 changed files with 27 additions and 23 deletions
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16
include/linux/mtd/mtd.h
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@@ -394,16 +394,8 @@ 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)
{
*retlen = 0;
return mtd->writev(mtd, vecs, count, to, retlen);
}
int mtd_writev(struct mtd_info *mtd, const struct kvec *vecs,
unsigned long count, loff_t to, size_t *retlen);
static inline void mtd_sync(struct mtd_info *mtd)
{
@@ -510,10 +502,6 @@ struct mtd_notifier {
extern void register_mtd_user (struct mtd_notifier *new);
extern int unregister_mtd_user (struct mtd_notifier *old);
int default_mtd_writev(struct mtd_info *mtd, const struct kvec *vecs,
unsigned long count, loff_t to, size_t *retlen);
void *mtd_kmalloc_up_to(const struct mtd_info *mtd, size_t *size);
void mtd_erase_callback(struct erase_info *instr);