ktime roundup function can be used to keep timer aligned and
prevent drift for recurring timeouts.
Signed-off-by: Jacob Pan <jacob.jun....@linux.intel.com>
---
include/linux/ktime.h | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/include/linux/ktime.h b/include/linux/ktime.h
index 2b6a204..2e293fa 100644
--- a/include/linux/ktime.h
+++ b/include/linux/ktime.h
@@ -233,6 +233,16 @@ static inline ktime_t ktime_sub_us(const ktime_t kt, const
u64 usec)
extern ktime_t ktime_add_safe(const ktime_t lhs, const ktime_t rhs);
+static inline ktime_t ktime_roundup(ktime_t x, ktime_t y)
+{
+ u64 temp_tv64;
+
+ temp_tv64 = x.tv64 + y.tv64 - 1;
+ temp_tv64 = div64_u64(temp_tv64, y.tv64);
+ x.tv64 = temp_tv64 * y.tv64;
+
+ return x;
+}
/**
* ktime_to_timespec_cond - convert a ktime_t variable to timespec
* format only if the variable contains data
--
1.9.1
--
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