[PATCH] elevator=as back-compatibility

As of 2.6.15 you need to use "anticipatory" instead of "as". Fix that up
so that `elevator=as' still works.

Signed-off-by: Chuck Ebbert <[e-mail]>
Cc: Nick Piggin <[e-mail]>
Cc: Jens Axboe <[e-mail]>
Cc: <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

block/elevator.c

···
 	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.
  	 */