diff options
Diffstat (limited to 'include/linux/mtd/mtd.h')
| -rw-r--r-- | include/linux/mtd/mtd.h | 34 |
1 files changed, 29 insertions, 5 deletions
diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h index 6cd0f6b7658b..205ededccc60 100644 --- a/include/linux/mtd/mtd.h +++ b/include/linux/mtd/mtd.h @@ -267,7 +267,7 @@ struct mtd_info { */ unsigned int bitflip_threshold; - // Kernel-only stuff starts here. + /* Kernel-only stuff starts here. */ const char *name; int index; @@ -297,10 +297,6 @@ struct mtd_info { int (*_point) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, void **virt, resource_size_t *phys); int (*_unpoint) (struct mtd_info *mtd, loff_t from, size_t len); - unsigned long (*_get_unmapped_area) (struct mtd_info *mtd, - unsigned long len, - unsigned long offset, - unsigned long flags); int (*_read) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf); int (*_write) (struct mtd_info *mtd, loff_t to, size_t len, @@ -493,6 +489,34 @@ static inline uint32_t mtd_mod_by_eb(uint64_t sz, struct mtd_info *mtd) return do_div(sz, mtd->erasesize); } +/** + * mtd_align_erase_req - Adjust an erase request to align things on eraseblock + * boundaries. + * @mtd: the MTD device this erase request applies on + * @req: the erase request to adjust + * + * This function will adjust @req->addr and @req->len to align them on + * @mtd->erasesize. Of course we expect @mtd->erasesize to be != 0. + */ +static inline void mtd_align_erase_req(struct mtd_info *mtd, + struct erase_info *req) +{ + u32 mod; + + if (WARN_ON(!mtd->erasesize)) + return; + + mod = mtd_mod_by_eb(req->addr, mtd); + if (mod) { + req->addr -= mod; + req->len += mod; + } + + mod = mtd_mod_by_eb(req->addr + req->len, mtd); + if (mod) + req->len += mtd->erasesize - mod; +} + static inline uint32_t mtd_div_by_ws(uint64_t sz, struct mtd_info *mtd) { if (mtd->writesize_shift) |