OpenWrt – Blame information for rev 1
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Rev | Author | Line No. | Line |
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1 | office | 1 | From: Gabor Juhos <juhosg@openwrt.org> |
2 | Subject: kernel/3.10: add separate rootfs partition parser |
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3 | |||
4 | lede-commit: daec7ad7688415156e2730e401503d09bd3acf91 |
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5 | Signed-off-by: Gabor Juhos <juhosg@openwrt.org> |
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6 | --- |
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7 | drivers/mtd/mtdpart.c | 29 +++++++++++++++++++++++++++++ |
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8 | include/linux/mtd/mtd.h | 18 ++++++++++++++++++ |
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9 | include/linux/mtd/partitions.h | 2 ++ |
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10 | 3 files changed, 49 insertions(+) |
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11 | |||
12 | --- a/drivers/mtd/mtdpart.c |
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13 | +++ b/drivers/mtd/mtdpart.c |
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14 | @@ -1222,6 +1222,24 @@ int mtd_is_partition(const struct mtd_in |
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15 | } |
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16 | EXPORT_SYMBOL_GPL(mtd_is_partition); |
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17 | |||
18 | +struct mtd_info *mtdpart_get_master(const struct mtd_info *mtd) |
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19 | +{ |
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20 | + if (!mtd_is_partition(mtd)) |
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21 | + return (struct mtd_info *)mtd; |
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22 | + |
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23 | + return mtd_to_part(mtd)->parent; |
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24 | +} |
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25 | +EXPORT_SYMBOL_GPL(mtdpart_get_master); |
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26 | + |
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27 | +uint64_t mtdpart_get_offset(const struct mtd_info *mtd) |
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28 | +{ |
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29 | + if (!mtd_is_partition(mtd)) |
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30 | + return 0; |
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31 | + |
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32 | + return mtd_to_part(mtd)->offset; |
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33 | +} |
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34 | +EXPORT_SYMBOL_GPL(mtdpart_get_offset); |
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35 | + |
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36 | /* Returns the size of the entire flash chip */ |
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37 | uint64_t mtd_get_device_size(const struct mtd_info *mtd) |
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38 | { |
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39 | --- a/include/linux/mtd/mtd.h |
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40 | +++ b/include/linux/mtd/mtd.h |
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41 | @@ -485,6 +485,24 @@ static inline uint32_t mtd_mod_by_eb(uin |
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42 | return do_div(sz, mtd->erasesize); |
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43 | } |
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44 | |||
45 | +static inline uint64_t mtd_roundup_to_eb(uint64_t sz, struct mtd_info *mtd) |
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46 | +{ |
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47 | + if (mtd_mod_by_eb(sz, mtd) == 0) |
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48 | + return sz; |
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49 | + |
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50 | + /* Round up to next erase block */ |
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51 | + return (mtd_div_by_eb(sz, mtd) + 1) * mtd->erasesize; |
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52 | +} |
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53 | + |
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54 | +static inline uint64_t mtd_rounddown_to_eb(uint64_t sz, struct mtd_info *mtd) |
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55 | +{ |
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56 | + if (mtd_mod_by_eb(sz, mtd) == 0) |
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57 | + return sz; |
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58 | + |
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59 | + /* Round down to the start of the current erase block */ |
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60 | + return (mtd_div_by_eb(sz, mtd)) * mtd->erasesize; |
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61 | +} |
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62 | + |
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63 | static inline uint32_t mtd_div_by_ws(uint64_t sz, struct mtd_info *mtd) |
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64 | { |
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65 | if (mtd->writesize_shift) |
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66 | --- a/include/linux/mtd/partitions.h |
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67 | +++ b/include/linux/mtd/partitions.h |
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68 | @@ -116,6 +116,8 @@ int mtd_is_partition(const struct mtd_in |
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69 | int mtd_add_partition(struct mtd_info *master, const char *name, |
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70 | long long offset, long long length); |
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71 | int mtd_del_partition(struct mtd_info *master, int partno); |
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72 | +struct mtd_info *mtdpart_get_master(const struct mtd_info *mtd); |
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73 | +uint64_t mtdpart_get_offset(const struct mtd_info *mtd); |
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74 | uint64_t mtd_get_device_size(const struct mtd_info *mtd); |
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75 | |||
76 | #endif |