[BLOCK] elevator: Make elevator=as work again for anticipatory

Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com>
Signed-off-by: Jens Axboe <axboe@suse.de>

1 files changed, 7 insertions, 0 deletions

diff --git a/block/elevator.c b/block/elevator.c
index 1d0759178e4..e8025b2ec54 100644
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -149,6 +149,13 @@ static void elevator_setup_default(void)
         if (!chosen_elevator[0])
                 strcpy(chosen_elevator, CONFIG_DEFAULT_IOSCHED);
 
+        /*
+         * Be backwards-compatible with previous kernels, so users
+         * won't get the wrong elevator.
+         */
+        if (!strcmp(chosen_elevator, "as"))
+                strcpy(chosen_elevator, "anticipatory");
+
         /*
          * If the given scheduler is not available, fall back to no-op.
          */