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authorSouvik Banerjee <souvik1997@gmail.com>2018-03-30 14:32:42 -0500
committerJens Axboe <axboe@kernel.dk>2018-03-30 14:16:24 -0600
commita5040c2d8dd732252609cde84ee3cdd6f1b1f927 (patch)
treedee51781faddd696e53e811dc9404b81cbd96803
parentb65125fa57973baeabc3a6fe2f8c1179bd45fd95 (diff)
downloadlinux-a5040c2d8dd732252609cde84ee3cdd6f1b1f927.tar.bz2
blktrace: fix comment in blktrace_api.h
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> Signed-off-by: Jens Axboe <axboe@kernel.dk>
-rw-r--r--include/uapi/linux/blktrace_api.h2
1 files changed, 1 insertions, 1 deletions
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 */