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    Subject[PATCH RT 02/24] locallock: provide {get,put}_locked_ptr() variants
    4.14.63-rt41-rc2 stable review patch.
    If anyone has any objections, please let me know.

    ------------------

    From: Julia Cartwright <julia@ni.com>

    [ Upstream commit 3d45cf23db4f76cd356ebb0aa4cdaa7d92d1a64e ]

    Provide a set of locallocked accessors for pointers to per-CPU data;
    this is useful for dynamically-allocated per-CPU regions, for example.

    These are symmetric with the {get,put}_cpu_ptr() per-CPU accessor
    variants.

    Signed-off-by: Julia Cartwright <julia@ni.com>
    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
    Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
    ---
    include/linux/locallock.h | 10 ++++++++++
    1 file changed, 10 insertions(+)

    diff --git a/include/linux/locallock.h b/include/linux/locallock.h
    index d658c2552601..921eab83cd34 100644
    --- a/include/linux/locallock.h
    +++ b/include/linux/locallock.h
    @@ -222,6 +222,14 @@ static inline int __local_unlock_irqrestore(struct local_irq_lock *lv,

    #define put_locked_var(lvar, var) local_unlock(lvar);

    +#define get_locked_ptr(lvar, var) \
    + ({ \
    + local_lock(lvar); \
    + this_cpu_ptr(var); \
    + })
    +
    +#define put_locked_ptr(lvar, var) local_unlock(lvar);
    +
    #define local_lock_cpu(lvar) \
    ({ \
    local_lock(lvar); \
    @@ -262,6 +270,8 @@ static inline void local_irq_lock_init(int lvar) { }

    #define get_locked_var(lvar, var) get_cpu_var(var)
    #define put_locked_var(lvar, var) put_cpu_var(var)
    +#define get_locked_ptr(lvar, var) get_cpu_ptr(var)
    +#define put_locked_ptr(lvar, var) put_cpu_ptr(var)

    #define local_lock_cpu(lvar) get_cpu()
    #define local_unlock_cpu(lvar) put_cpu()
    --
    2.18.0

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