cfq-iosched: fix sparse warnings (__nocast type)

Index: quilt/drivers/block/cfq-iosched.c
===================================================================
@@ -1415,7 +1415,7 @@ static void cfq_exit_io_context(struct c
 }
 
 static struct cfq_io_context *
-cfq_alloc_io_context(struct cfq_data *cfqd, int gfp_mask)
+cfq_alloc_io_context(struct cfq_data *cfqd, unsigned int __nocast gfp_mask)
 {
 	struct cfq_io_context *cic = kmem_cache_alloc(cfq_ioc_pool, gfp_mask);
 

@@ -1510,7 +1510,7 @@ static int cfq_ioc_set_ioprio(struct io_
 
 static struct cfq_queue *
 cfq_get_queue(struct cfq_data *cfqd, unsigned int key, unsigned short ioprio,
-	      int gfp_mask)
+	      unsigned int __nocast gfp_mask)
 {
 	const int hashval = hash_long(key, CFQ_QHASH_SHIFT);
 	struct cfq_queue *cfqq, *new_cfqq = NULL;

@@ -1571,7 +1571,7 @@ out:
  * cfqq, so we don't need to worry about it disappearing
  */
 static struct cfq_io_context *
-cfq_get_io_context(struct cfq_data *cfqd, pid_t pid, int gfp_mask)
+cfq_get_io_context(struct cfq_data *cfqd, pid_t pid, unsigned int __nocast gfp_mask)
 {
 	struct io_context *ioc = NULL;
 	struct cfq_io_context *cic;

@@ -2063,7 +2063,7 @@ static void cfq_put_request(request_queu
  */
 static int
 cfq_set_request(request_queue_t *q, struct request *rq, struct bio *bio,
-		int gfp_mask)
+		unsigned int __nocast gfp_mask)
 {
 	struct cfq_data *cfqd = q->elevator->elevator_data;
 	struct task_struct *tsk = current;