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    Subject[patch V2 16/64] timekeeping: Use ktime_t based data for ktime_get()
    Speed up ktime_get() by using ktime_t based data. Text size shrinks by
    64 bytes on x8664.

    Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
    ---
    kernel/time/timekeeping.c | 9 +++++----
    1 file changed, 5 insertions(+), 4 deletions(-)

    Index: tip/kernel/time/timekeeping.c
    ===================================================================
    --- tip.orig/kernel/time/timekeeping.c
    +++ tip/kernel/time/timekeeping.c
    @@ -407,18 +407,19 @@ ktime_t ktime_get(void)
    {
    struct timekeeper *tk = &tk_core.timekeeper;
    unsigned int seq;
    - s64 secs, nsecs;
    + ktime_t base;
    + s64 nsecs;

    WARN_ON(timekeeping_suspended);

    do {
    seq = read_seqcount_begin(&tk_core.seq);
    - secs = tk->xtime_sec + tk->wall_to_monotonic.tv_sec;
    - nsecs = timekeeping_get_ns(tk) + tk->wall_to_monotonic.tv_nsec;
    + base = tk->base_mono;
    + nsecs = timekeeping_get_ns(tk);

    } while (read_seqcount_retry(&tk_core.seq, seq));

    - return ktime_set(secs, nsecs);
    + return ktime_add_ns(base, nsecs);
    }
    EXPORT_SYMBOL_GPL(ktime_get);




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