blktrace: provide empty merge_blktrace_iologs()

For platforms that don't suppor blktrace, we need an empty
helper that just fails it.

Fixes: b9921d1a56d9 ("blktrace: add support to interleave blktrace files")
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/blktrace.h b/blktrace.h
index 72d74cf8ad30e72b00ca5c893bc7245ed8d9b835..a0e82faa05eed81bb3e8819a200208089a6009d7 100644 (file)
--- a/blktrace.h
+++ b/blktrace.h
@@ -36,5 +36,10 @@ static inline bool load_blktrace(struct thread_data *td, const char *fname,
        return false;
 }
 
+static inline int merge_blktrace_iologs(struct thread_data *td)
+{
+       return false;
+}
+
 #endif
 #endif