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    Subject[PATCH v2 01/44] maple_tree: Add mas_init() function
    Date
    From: "Liam R. Howlett" <Liam.Howlett@Oracle.com>

    Add a function that will zero out the maple state struct and set some
    basic defaults.

    Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
    ---
    include/linux/maple_tree.h | 11 +++++++++++
    1 file changed, 11 insertions(+)

    diff --git a/include/linux/maple_tree.h b/include/linux/maple_tree.h
    index e594db58a0f1..3f972602c978 100644
    --- a/include/linux/maple_tree.h
    +++ b/include/linux/maple_tree.h
    @@ -433,6 +433,7 @@ struct ma_wr_state {
    .min = 0, \
    .max = ULONG_MAX, \
    .alloc = NULL, \
    + .mas_flags = 0, \
    }

    #define MA_WR_STATE(name, ma_state, wr_entry) \
    @@ -471,6 +472,16 @@ void *mas_next(struct ma_state *mas, unsigned long max);
    int mas_empty_area(struct ma_state *mas, unsigned long min, unsigned long max,
    unsigned long size);

    +static inline void mas_init(struct ma_state *mas, struct maple_tree *tree,
    + unsigned long addr)
    +{
    + memset(mas, 0, sizeof(struct ma_state));
    + mas->tree = tree;
    + mas->index = mas->last = addr;
    + mas->max = ULONG_MAX;
    + mas->node = MAS_START;
    +}
    +
    /* Checks if a mas has not found anything */
    static inline bool mas_is_none(struct ma_state *mas)
    {
    --
    2.35.1
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