update block_device_operations documentation

Updated Documentation/filesystems/Locking to match the code.

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

diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking
index 2db4283efa8dbf99e0e6576edc8d0a054d3b299d..8a817f656f0a808dffb344c6a46bab960cb8a0ae 100644 (file)
--- 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: