[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>

diff --git a/block/elevator.c b/block/elevator.c
index 1d07591..e8025b2 100644 (file)
--- 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.
         */