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Subject[PATCH] blktrace: fix comment in blktrace_api.h
Date
The `__u64 time` field of the blk_io_trace struct refers to
the time in nanoseconds, not in microseconds. It is set in
__blk_add_trace, which does the following:

t->time = ktime_to_ns(ktime_get());

ktime_to_ns returns ktime_t in nanoseconds, not microseconds.

Signed-off-by: Souvik Banerjee <souvik1997@gmail.com>
---
include/uapi/linux/blktrace_api.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/uapi/linux/blktrace_api.h b/include/uapi/linux/blktrace_api.h
index 3c50e07ee833..690621b610e5 100644
--- a/include/uapi/linux/blktrace_api.h
+++ b/include/uapi/linux/blktrace_api.h
@@ -101,7 +101,7 @@ enum blktrace_notify {
struct blk_io_trace {
__u32 magic; /* MAGIC << 8 | version */
__u32 sequence; /* event number */
- __u64 time; /* in microseconds */
+ __u64 time; /* in nanoseconds */
__u64 sector; /* disk offset */
__u32 bytes; /* transfer length */
__u32 action; /* what happened */
--
2.16.3
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