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    Subject[PATCH v6 66/80] locking/refcount: document the new "oldp" pointer value
    Date
    Changeset a435b9a14356 ("locking/refcount: Provide __refcount API to obtain the old value")
    added a new parameter to most refcount functions, but didn't update
    the kernel-doc markups.

    Add a description for it on all touched functions.

    Fixes: a435b9a14356 ("locking/refcount: Provide __refcount API to obtain the old value")
    Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
    ---
    include/linux/refcount.h | 7 +++++++
    1 file changed, 7 insertions(+)

    diff --git a/include/linux/refcount.h b/include/linux/refcount.h
    index 0e3ee25eb156..24c343bed889 100644
    --- a/include/linux/refcount.h
    +++ b/include/linux/refcount.h
    @@ -151,6 +151,7 @@ static inline unsigned int refcount_read(const refcount_t *r)
    * refcount_add_not_zero - add a value to a refcount unless it is 0
    * @i: the value to add to the refcount
    * @r: the refcount
    + * @oldp: if not NULL, stores the previous value of the refcount
    *
    * Will saturate at REFCOUNT_SATURATED and WARN.
    *
    @@ -184,6 +185,7 @@ static inline __must_check bool refcount_add_not_zero(int i, refcount_t *r)
    * refcount_add - add a value to a refcount
    * @i: the value to add to the refcount
    * @r: the refcount
    + * @oldp: if not NULL, stores the previous value of the refcount
    *
    * Similar to atomic_add(), but will saturate at REFCOUNT_SATURATED and WARN.
    *
    @@ -209,6 +211,7 @@ static inline void refcount_add(int i, refcount_t *r)
    /**
    * refcount_inc_not_zero - increment a refcount unless it is 0
    * @r: the refcount to increment
    + * @oldp: if not NULL, stores the previous value of the refcount
    *
    * Similar to atomic_inc_not_zero(), but will saturate at REFCOUNT_SATURATED
    * and WARN.
    @@ -227,6 +230,7 @@ static inline __must_check bool refcount_inc_not_zero(refcount_t *r)
    /**
    * refcount_inc - increment a refcount
    * @r: the refcount to increment
    + * @oldp: if not NULL, stores the previous value of the refcount
    *
    * Similar to atomic_inc(), but will saturate at REFCOUNT_SATURATED and WARN.
    *
    @@ -245,6 +249,7 @@ static inline void refcount_inc(refcount_t *r)
    * refcount_sub_and_test - subtract from a refcount and test if it is 0
    * @i: amount to subtract from the refcount
    * @r: the refcount
    + * @oldp: if not NULL, stores the previous value of the refcount
    *
    * Similar to atomic_dec_and_test(), but it will WARN, return false and
    * ultimately leak on underflow and will fail to decrement when saturated
    @@ -279,6 +284,7 @@ static inline __must_check bool refcount_sub_and_test(int i, refcount_t *r)
    /**
    * refcount_dec_and_test - decrement a refcount and test if it is 0
    * @r: the refcount
    + * @oldp: if not NULL, stores the previous value of the refcount
    *
    * Similar to atomic_dec_and_test(), it will WARN on underflow and fail to
    * decrement when saturated at REFCOUNT_SATURATED.
    @@ -297,6 +303,7 @@ static inline __must_check bool refcount_dec_and_test(refcount_t *r)
    /**
    * refcount_dec - decrement a refcount
    * @r: the refcount
    + * @oldp: if not NULL, stores the previous value of the refcount
    *
    * Similar to atomic_dec(), it will WARN on underflow and fail to decrement
    * when saturated at REFCOUNT_SATURATED.
    --
    2.26.2
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