update block_device_operations documentation

Updated Documentation/filesystems/Locking to match the code.

Signed-off-by: Christoph Hellwig <hch@lst.de>

1 files changed, 23 insertions, 8 deletions

diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking
index 2db4283efa8d..8a817f656f0a 100644
--- a/Documentation/filesystems/Locking
+++ b/Documentation/filesystems/Locking
@@ -349,21 +349,36 @@ call this method upon the IO completion.
 
 --------------------------- block_device_operations -----------------------
 prototypes:
-        int (*open) (struct inode *, struct file *);
-        int (*release) (struct inode *, struct file *);
-        int (*ioctl) (struct inode *, struct file *, unsigned, unsigned long);
+        int (*open) (struct block_device *, fmode_t);
+        int (*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, void **, unsigned long *);
         int (*media_changed) (struct gendisk *);
+        void (*unlock_native_capacity) (struct gendisk *);
         int (*revalidate_disk) (struct gendisk *);
+        int (*getgeo)(struct block_device *, struct hd_geometry *);
+        void (*swap_slot_free_notify) (struct block_device *, unsigned long);
 
 locking rules:
-                        BKL     bd_sem
-open:                   yes     yes
-release:                yes     yes
-ioctl:                  yes     no
+                        BKL     bd_mutex
+open:                   no      yes
+release:                no      yes
+ioctl:                  no      no
+compat_ioctl:           no      no
+direct_access:          no      no
 media_changed:          no      no
+unlock_native_capacity: no      no
 revalidate_disk:        no      no
+getgeo:                 no      no
+swap_slot_free_notify:  no      no      (see below)
+
+media_changed, unlock_native_capacity and revalidate_disk are called only from
+check_disk_change().
+
+swap_slot_free_notify is called with swap_lock and sometimes the page lock
+held.
 
-The last two are called only from check_disk_change().
 
 --------------------------- file_operations -------------------------------
 prototypes: