2 files changed, 35 insertions, 0 deletions

diff --git a/include/linux/timekeeping.h b/include/linux/timekeeping.h
index 3ef9791d7d75..42f71f4b658a 100644
--- a/include/linux/timekeeping.h
+++ b/include/linux/timekeeping.h
@@ -51,6 +51,7 @@ enum tk_offsets {
 
 extern ktime_t ktime_get(void);
 extern ktime_t ktime_get_with_offset(enum tk_offsets offs);
+extern ktime_t ktime_get_coarse_with_offset(enum tk_offsets offs);
 extern ktime_t ktime_mono_to_any(ktime_t tmono, enum tk_offsets offs);
 extern ktime_t ktime_get_raw(void);
 extern u32 ktime_get_resolution_ns(void);
@@ -63,6 +64,11 @@ static inline ktime_t ktime_get_real(void)
         return ktime_get_with_offset(TK_OFFS_REAL);
 }
 
+static inline ktime_t ktime_get_coarse_real(void)
+{
+        return ktime_get_coarse_with_offset(TK_OFFS_REAL);
+}
+
 /**
  * ktime_get_boottime - Returns monotonic time since boot in ktime_t format
  *
@@ -74,6 +80,11 @@ static inline ktime_t ktime_get_boottime(void)
         return ktime_get_with_offset(TK_OFFS_BOOT);
 }
 
+static inline ktime_t ktime_get_coarse_boottime(void)
+{
+        return ktime_get_coarse_with_offset(TK_OFFS_BOOT);
+}
+
 /**
  * ktime_get_clocktai - Returns the TAI time of day in ktime_t format
  */
@@ -82,6 +93,11 @@ static inline ktime_t ktime_get_clocktai(void)
         return ktime_get_with_offset(TK_OFFS_TAI);
 }
 
+static inline ktime_t ktime_get_coarse_clocktai(void)
+{
+        return ktime_get_coarse_with_offset(TK_OFFS_TAI);
+}
+
 /**
  * ktime_mono_to_real - Convert monotonic time to clock realtime
  */
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index ed9b74ec9c0b..4786df904c22 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -795,6 +795,25 @@ ktime_t ktime_get_with_offset(enum tk_offsets offs)
 }
 EXPORT_SYMBOL_GPL(ktime_get_with_offset);
 
+ktime_t ktime_get_coarse_with_offset(enum tk_offsets offs)
+{
+        struct timekeeper *tk = &tk_core.timekeeper;
+        unsigned int seq;
+        ktime_t base, *offset = offsets[offs];
+
+        WARN_ON(timekeeping_suspended);
+
+        do {
+                seq = read_seqcount_begin(&tk_core.seq);
+                base = ktime_add(tk->tkr_mono.base, *offset);
+
+        } while (read_seqcount_retry(&tk_core.seq, seq));
+
+        return base;
+
+}
+EXPORT_SYMBOL_GPL(ktime_get_coarse_with_offset);
+
 /**
  * ktime_mono_to_any() - convert mononotic time to any other time
  * @tmono:      time to convert.