Merge branch 'block-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/block

* 'block-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/block:
  [PATCH] fix rmmod problems with elevator attributes, clean them up
  [PATCH] elevator_t lifetime rules and sysfs fixes
  [PATCH] noise removal: cfq-iosched.c
  [PATCH] don't bother with refcounting for cfq_data
  [PATCH] fix sysfs interaction and lifetime rules handling for queues
  [PATCH] regularize blk_cleanup_queue() use
  [PATCH] fix cfq_get_queue()/ioprio_set(2) races
  [PATCH] deal with rmmod/put_io_context() races
  [PATCH] stop elv_unregister() from rogering other iosched's data, fix locking
  [PATCH] stop cfq from pinning queue down
  [PATCH] make cfq_exit_queue() prune the cfq_io_context for that queue
  [PATCH] fix the exclusion for ioprio_set()
  [PATCH] keep sync and async cfq_queue separate
  [PATCH] switch to use of ->key to get cfq_data by cfq_io_context
  [PATCH] stop leaking cfq_data in cfq_set_request()
  [PATCH] fix cfq hash lookups
  [PATCH] fix locking in queue_requests_store()
  [PATCH] fix double-free in blk_init_queue_node()
  [PATCH] don't do exit_io_context() until we know we won't be doing any IO

2 files changed, 15 insertions, 5 deletions

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 860e7a485a5f..56bb6a4e15f3 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -58,7 +58,7 @@ struct cfq_io_context {
          * circular list of cfq_io_contexts belonging to a process io context
          */
         struct list_head list;
-        struct cfq_queue *cfqq;
+        struct cfq_queue *cfqq[2];
         void *key;
 
         struct io_context *ioc;
@@ -69,6 +69,8 @@ struct cfq_io_context {
         unsigned long ttime_samples;
         unsigned long ttime_mean;
 
+        struct list_head queue_list;
+
         void (*dtor)(struct cfq_io_context *);
         void (*exit)(struct cfq_io_context *);
 };
@@ -404,8 +406,6 @@ struct request_queue
 
         struct blk_queue_tag    *queue_tags;
 
-        atomic_t                refcnt;
-
         unsigned int            nr_sorted;
         unsigned int            in_flight;
 
@@ -424,6 +424,8 @@ struct request_queue
         struct request          pre_flush_rq, bar_rq, post_flush_rq;
         struct request          *orig_bar_rq;
         unsigned int            bi_size;
+
+        struct mutex            sysfs_lock;
 };
 
 #define RQ_INACTIVE             (-1)
@@ -725,7 +727,7 @@ extern long nr_blockdev_pages(void);
 int blk_get_queue(request_queue_t *);
 request_queue_t *blk_alloc_queue(gfp_t);
 request_queue_t *blk_alloc_queue_node(gfp_t, int);
-#define blk_put_queue(q) blk_cleanup_queue((q))
+extern void blk_put_queue(request_queue_t *);
 
 /*
  * tag stuff
diff --git a/include/linux/elevator.h b/include/linux/elevator.h
index 18cf1f3e1184..ad133fcfb239 100644
--- a/include/linux/elevator.h
+++ b/include/linux/elevator.h
@@ -48,10 +48,17 @@ struct elevator_ops
 
         elevator_init_fn *elevator_init_fn;
         elevator_exit_fn *elevator_exit_fn;
+        void (*trim)(struct io_context *);
 };
 
 #define ELV_NAME_MAX    (16)
 
+struct elv_fs_entry {
+        struct attribute attr;
+        ssize_t (*show)(elevator_t *, char *);
+        ssize_t (*store)(elevator_t *, const char *, size_t);
+};
+
 /*
  * identifies an elevator type, such as AS or deadline
  */
@@ -60,7 +67,7 @@ struct elevator_type
         struct list_head list;
         struct elevator_ops ops;
         struct elevator_type *elevator_type;
-        struct kobj_type *elevator_ktype;
+        struct elv_fs_entry *elevator_attrs;
         char elevator_name[ELV_NAME_MAX];
         struct module *elevator_owner;
 };
@@ -74,6 +81,7 @@ struct elevator_queue
         void *elevator_data;
         struct kobject kobj;
         struct elevator_type *elevator_type;
+        struct mutex sysfs_lock;
 };
 
 /*