1 files changed, 29 insertions, 2 deletions

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 78feda9bbae2..2fdb4a451b49 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -361,6 +361,12 @@ struct request_queue {
          */
         struct kobject kobj;
 
+#ifdef CONFIG_PM_RUNTIME
+        struct device           *dev;
+        int                     rpm_status;
+        unsigned int            nr_pending;
+#endif
+
         /*
          * queue settings
          */
@@ -838,7 +844,7 @@ static inline unsigned int blk_queue_get_max_sectors(struct request_queue *q,
                                                      unsigned int cmd_flags)
 {
         if (unlikely(cmd_flags & REQ_DISCARD))
-                return q->limits.max_discard_sectors;
+                return min(q->limits.max_discard_sectors, UINT_MAX >> 9);
 
         if (unlikely(cmd_flags & REQ_WRITE_SAME))
                 return q->limits.max_write_same_sectors;
@@ -961,6 +967,27 @@ struct request_queue *blk_alloc_queue_node(gfp_t, int);
 extern void blk_put_queue(struct request_queue *);
 
 /*
+ * block layer runtime pm functions
+ */
+#ifdef CONFIG_PM_RUNTIME
+extern void blk_pm_runtime_init(struct request_queue *q, struct device *dev);
+extern int blk_pre_runtime_suspend(struct request_queue *q);
+extern void blk_post_runtime_suspend(struct request_queue *q, int err);
+extern void blk_pre_runtime_resume(struct request_queue *q);
+extern void blk_post_runtime_resume(struct request_queue *q, int err);
+#else
+static inline void blk_pm_runtime_init(struct request_queue *q,
+        struct device *dev) {}
+static inline int blk_pre_runtime_suspend(struct request_queue *q)
+{
+        return -ENOSYS;
+}
+static inline void blk_post_runtime_suspend(struct request_queue *q, int err) {}
+static inline void blk_pre_runtime_resume(struct request_queue *q) {}
+static inline void blk_post_runtime_resume(struct request_queue *q, int err) {}
+#endif
+
+/*
  * blk_plug permits building a queue of related requests by holding the I/O
  * fragments for a short period. This allows merging of sequential requests
  * into single larger request. As the requests are moved from a per-task list to
@@ -1484,7 +1511,7 @@ static inline bool blk_integrity_is_initialized(struct gendisk *g)
 
 struct block_device_operations {
         int (*open) (struct block_device *, fmode_t);
-        int (*release) (struct gendisk *, fmode_t);
+        void (*release) (struct gendisk *, fmode_t);
         int (*ioctl) (struct block_device *, fmode_t, unsigned, unsigned long);
         int (*compat_ioctl) (struct block_device *, fmode_t, unsigned, unsigned long);
         int (*direct_access) (struct block_device *, sector_t,