mtd: harmonize mtd_writev usage

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>

1 files changed, 2 insertions, 14 deletions

diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
index a994129ede5..a58ecf4d1f8 100644
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -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);