1 files changed, 6 insertions, 18 deletions

diff --git a/block/as-iosched.c b/block/as-iosched.c
index 96036846a001..8c3946787dbb 100644
--- a/block/as-iosched.c
+++ b/block/as-iosched.c
@@ -170,11 +170,11 @@ static void free_as_io_context(struct as_io_context *aic)
 
 static void as_trim(struct io_context *ioc)
 {
-        spin_lock(&ioc->lock);
+        spin_lock_irq(&ioc->lock);
         if (ioc->aic)
                 free_as_io_context(ioc->aic);
         ioc->aic = NULL;
-        spin_unlock(&ioc->lock);
+        spin_unlock_irq(&ioc->lock);
 }
 
 /* Called when the task exits */
@@ -235,10 +235,12 @@ static void as_put_io_context(struct request *rq)
         aic = RQ_IOC(rq)->aic;
 
         if (rq_is_sync(rq) && aic) {
-                spin_lock(&aic->lock);
+                unsigned long flags;
+
+                spin_lock_irqsave(&aic->lock, flags);
                 set_bit(AS_TASK_IORUNNING, &aic->state);
                 aic->last_end_request = jiffies;
-                spin_unlock(&aic->lock);
+                spin_unlock_irqrestore(&aic->lock, flags);
         }
 
         put_io_context(RQ_IOC(rq));
@@ -1266,22 +1268,8 @@ static void as_merged_requests(struct request_queue *q, struct request *req,
          */
         if (!list_empty(&req->queuelist) && !list_empty(&next->queuelist)) {
                 if (time_before(rq_fifo_time(next), rq_fifo_time(req))) {
-                        struct io_context *rioc = RQ_IOC(req);
-                        struct io_context *nioc = RQ_IOC(next);
-
                         list_move(&req->queuelist, &next->queuelist);
                         rq_set_fifo_time(req, rq_fifo_time(next));
-                        /*
-                         * Don't copy here but swap, because when anext is
-                         * removed below, it must contain the unused context
-                         */
-                        if (rioc != nioc) {
-                                double_spin_lock(&rioc->lock, &nioc->lock,
-                                                                rioc < nioc);
-                                swap_io_context(&rioc, &nioc);
-                                double_spin_unlock(&rioc->lock, &nioc->lock,
-                                                                rioc < nioc);
-                        }
                 }
         }