X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;ds=sidebyside;f=block%2Felevator.c;h=6c3fc8a10bf210f8cfcb8def13981c6274246b11;hb=d4d6bb41e09f07668ca2655da707eab936e8e8f0;hp=73aa46b6db492191daa88c248bc1bb5bb2b77414;hpb=15853af9f07673680439b224519c692f1352b959;p=linux-2.6

diff --git a/block/elevator.c b/block/elevator.c
index 73aa46b6db..6c3fc8a10b 100644
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -1,6 +1,4 @@
 /*
- *  linux/drivers/block/elevator.c
- *
  *  Block device elevator/IO-scheduler.
  *
  *  Copyright (C) 2000 Andrea Arcangeli <andrea@suse.de> SuSE
@@ -541,33 +539,19 @@ int elv_queue_empty(request_queue_t *q)
 
 struct request *elv_latter_request(request_queue_t *q, struct request *rq)
 {
-	struct list_head *next;
-
 	elevator_t *e = q->elevator;
 
 	if (e->ops->elevator_latter_req_fn)
 		return e->ops->elevator_latter_req_fn(q, rq);
-
-	next = rq->queuelist.next;
-	if (next != &q->queue_head && next != &rq->queuelist)
-		return list_entry_rq(next);
-
 	return NULL;
 }
 
 struct request *elv_former_request(request_queue_t *q, struct request *rq)
 {
-	struct list_head *prev;
-
 	elevator_t *e = q->elevator;
 
 	if (e->ops->elevator_former_req_fn)
 		return e->ops->elevator_former_req_fn(q, rq);
-
-	prev = rq->queuelist.prev;
-	if (prev != &q->queue_head && prev != &rq->queuelist)
-		return list_entry_rq(prev);
-
 	return NULL;
 }
 
@@ -762,13 +746,15 @@ error:
 ssize_t elv_iosched_store(request_queue_t *q, const char *name, size_t count)
 {
 	char elevator_name[ELV_NAME_MAX];
+	size_t len;
 	struct elevator_type *e;
 
-	memset(elevator_name, 0, sizeof(elevator_name));
-	strncpy(elevator_name, name, sizeof(elevator_name));
+	elevator_name[sizeof(elevator_name) - 1] = '\0';
+	strncpy(elevator_name, name, sizeof(elevator_name) - 1);
+	len = strlen(elevator_name);
 
-	if (elevator_name[strlen(elevator_name) - 1] == '\n')
-		elevator_name[strlen(elevator_name) - 1] = '\0';
+	if (len && elevator_name[len - 1] == '\n')
+		elevator_name[len - 1] = '\0';
 
 	e = elevator_get(elevator_name);
 	if (!e) {