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 2db4283..8a817f6 100644
--- a/Documentation/filesystems/Locking
+++ b/Documentation/filesystems/Locking
@@ -349,21 +349,36 @@
--------------------------- 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)
-The last two are called only from check_disk_change().
+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.
+
--------------------------- file_operations -------------------------------
prototypes: