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- From: Gabor Juhos <[email protected]>
- Subject: kernel/3.10: add separate rootfs partition parser
- lede-commit: daec7ad7688415156e2730e401503d09bd3acf91
- Signed-off-by: Gabor Juhos <[email protected]>
- ---
- drivers/mtd/mtdpart.c | 29 +++++++++++++++++++++++++++++
- include/linux/mtd/mtd.h | 18 ++++++++++++++++++
- include/linux/mtd/partitions.h | 2 ++
- 3 files changed, 49 insertions(+)
- --- a/drivers/mtd/mtdpart.c
- +++ b/drivers/mtd/mtdpart.c
- @@ -1165,6 +1165,24 @@ int mtd_is_partition(const struct mtd_in
- }
- EXPORT_SYMBOL_GPL(mtd_is_partition);
-
- +struct mtd_info *mtd_get_master(const struct mtd_info *mtd)
- +{
- + if (!mtd_is_partition(mtd))
- + return (struct mtd_info *)mtd;
- +
- + return mtd_to_part(mtd)->parent;
- +}
- +EXPORT_SYMBOL_GPL(mtd_get_master);
- +
- +uint64_t mtdpart_get_offset(const struct mtd_info *mtd)
- +{
- + if (!mtd_is_partition(mtd))
- + return 0;
- +
- + return mtd_to_part(mtd)->offset;
- +}
- +EXPORT_SYMBOL_GPL(mtdpart_get_offset);
- +
- /* Returns the size of the entire flash chip */
- uint64_t mtd_get_device_size(const struct mtd_info *mtd)
- {
- --- a/include/linux/mtd/mtd.h
- +++ b/include/linux/mtd/mtd.h
- @@ -504,6 +504,24 @@ static inline void mtd_align_erase_req(s
- req->len += mtd->erasesize - mod;
- }
-
- +static inline uint64_t mtd_roundup_to_eb(uint64_t sz, struct mtd_info *mtd)
- +{
- + if (mtd_mod_by_eb(sz, mtd) == 0)
- + return sz;
- +
- + /* Round up to next erase block */
- + return (mtd_div_by_eb(sz, mtd) + 1) * mtd->erasesize;
- +}
- +
- +static inline uint64_t mtd_rounddown_to_eb(uint64_t sz, struct mtd_info *mtd)
- +{
- + if (mtd_mod_by_eb(sz, mtd) == 0)
- + return sz;
- +
- + /* Round down to the start of the current erase block */
- + return (mtd_div_by_eb(sz, mtd)) * mtd->erasesize;
- +}
- +
- static inline uint32_t mtd_div_by_ws(uint64_t sz, struct mtd_info *mtd)
- {
- if (mtd->writesize_shift)
- --- a/include/linux/mtd/partitions.h
- +++ b/include/linux/mtd/partitions.h
- @@ -116,6 +116,8 @@ int mtd_is_partition(const struct mtd_in
- int mtd_add_partition(struct mtd_info *master, const char *name,
- long long offset, long long length);
- int mtd_del_partition(struct mtd_info *master, int partno);
- +struct mtd_info *mtd_get_master(const struct mtd_info *mtd);
- +uint64_t mtdpart_get_offset(const struct mtd_info *mtd);
- uint64_t mtd_get_device_size(const struct mtd_info *mtd);
-
- #endif
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