Merge branch 'i2c/for-4.15' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git...

[sfrench/cifs-2.6.git] / include / linux / timekeeper_internal.h

diff --git a/include/linux/timekeeper_internal.h b/include/linux/timekeeper_internal.h
index 97154c61e5d2b3dc9e59f37abb187652f10bb8f7..7e9011101cb08f674a5c2ba698be5f67367a464c 100644 (file)
--- a/include/linux/timekeeper_internal.h
+++ b/include/linux/timekeeper_internal.h
@@ -14,19 +14,22 @@
 /**
  * struct tk_read_base - base structure for timekeeping readout
  * @clock:     Current clocksource used for timekeeping.
- * @read:      Read function of @clock
  * @mask:      Bitmask for two's complement subtraction of non 64bit clocks
  * @cycle_last: @clock cycle value at last update
  * @mult:      (NTP adjusted) multiplier for scaled math conversion
  * @shift:     Shift value for scaled math conversion
  * @xtime_nsec: Shifted (fractional) nano seconds offset for readout
  * @base:      ktime_t (nanoseconds) base time for readout
+ * @base_real: Nanoseconds base value for clock REALTIME readout
  *
  * This struct has size 56 byte on 64 bit. Together with a seqcount it
  * occupies a single 64byte cache line.
  *
  * The struct is separate from struct timekeeper as it is also used
  * for a fast NMI safe accessors.
+ *
+ * @base_real is for the fast NMI safe accessor to allow reading clock
+ * realtime from any context.
  */
 struct tk_read_base {
        struct clocksource      *clock;
@@ -36,6 +39,7 @@ struct tk_read_base {
        u32                     shift;
        u64                     xtime_nsec;
        ktime_t                 base;
+       u64                     base_real;
 };
 
 /**