[patch 06/12] elevator=as back-compatibility

[Greg KH]

2.6.15.2 -stable review patch.  If anyone has any objections, please let 
us know.

------------------

From: Chuck Ebbert <76306.1226@xxxxxxxxxxxxxx>

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 <76306.1226@xxxxxxxxxxxxxx>
Cc: Nick Piggin <nickpiggin@xxxxxxxxxxxx>
Cc: Jens Axboe <axboe@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
Signed-off-by: Chris Wright <chrisw@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
 block/elevator.c |    7 +++++++
 1 file changed, 7 insertions(+)

--- linux-2.6.15.1.orig/block/elevator.c
+++ linux-2.6.15.1/block/elevator.c
@@ -150,6 +150,13 @@ 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.
  	 */

--
-
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