1 files changed, 17 insertions, 1 deletions

diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index 56e17ed24816..13893aa2ac9d 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -127,6 +127,11 @@ struct hd_struct {
 #define GENHD_FL_EXT_DEVT                       64 /* allow extended devt */
 #define GENHD_FL_NATIVE_CAPACITY                128
 
+enum {
+        DISK_EVENT_MEDIA_CHANGE                 = 1 << 0, /* media changed */
+        DISK_EVENT_EJECT_REQUEST                = 1 << 1, /* eject requested */
+};
+
 #define BLK_SCSI_MAX_CMDS       (256)
 #define BLK_SCSI_CMD_PER_LONG   (BLK_SCSI_MAX_CMDS / (sizeof(long) * 8))
 
@@ -143,6 +148,8 @@ struct disk_part_tbl {
         struct hd_struct __rcu *part[];
 };
 
+struct disk_events;
+
 struct gendisk {
         /* major, first_minor and minors are input parameters only,
          * don't use directly.  Use disk_devt() and disk_max_parts().
@@ -154,6 +161,10 @@ struct gendisk {
 
         char disk_name[DISK_NAME_LEN];  /* name of major driver */
         char *(*devnode)(struct gendisk *gd, mode_t *mode);
+
+        unsigned int events;            /* supported events */
+        unsigned int async_events;      /* async events, subset of all */
+
         /* Array of pointers to partitions indexed by partno.
          * Protected with matching bdev lock but stat and other
          * non-critical accesses use RCU.  Always access through
@@ -171,8 +182,8 @@ struct gendisk {
         struct kobject *slave_dir;
 
         struct timer_rand_state *random;
-
         atomic_t sync_io;               /* RAID */
+        struct disk_events *ev;
 #ifdef  CONFIG_BLK_DEV_INTEGRITY
         struct blk_integrity *integrity;
 #endif
@@ -405,6 +416,11 @@ static inline int get_disk_ro(struct gendisk *disk)
         return disk->part0.policy;
 }
 
+extern void disk_block_events(struct gendisk *disk);
+extern void disk_unblock_events(struct gendisk *disk);
+extern void disk_check_events(struct gendisk *disk);
+extern unsigned int disk_clear_events(struct gendisk *disk, unsigned int mask);
+
 /* drivers/char/random.c */
 extern void add_disk_randomness(struct gendisk *disk);
 extern void rand_initialize_disk(struct gendisk *disk);