Fix bogus 'may be used uninitialized' warning from older gcc versions

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

diff --git a/io_u.c b/io_u.c
index 8863fa749f13ece7342484101db132ee94d8714a..f2406e8c1ec91cb86f56196b2f83e33dca9087ca 100644 (file)
--- a/io_u.c
+++ b/io_u.c
@@ -882,7 +882,11 @@ void io_u_log_error(struct thread_data *td, struct io_u *io_u)
 static void io_completed(struct thread_data *td, struct io_u *io_u,
                         struct io_completion_data *icd)
 {
 static void io_completed(struct thread_data *td, struct io_u *io_u,
                         struct io_completion_data *icd)
 {

-       unsigned long usec;
+       /*
+        * Older gcc's are too dumb to realize that usec is always used
+        * initialized, silence that warning.
+        */
+       unsigned long uninitialized_var(usec);

 
        dprint_io_u(io_u, "io complete");
 
 
        dprint_io_u(io_u, "io complete");