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-rw-r--r--Documentation/filesystems/Locking18
1 files changed, 0 insertions, 18 deletions
diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking
index 18b9d0ca0630..06bbbed71206 100644
--- a/Documentation/filesystems/Locking
+++ b/Documentation/filesystems/Locking
@@ -460,13 +460,6 @@ in sys_read() and friends.
--------------------------- dquot_operations -------------------------------
prototypes:
- int (*initialize) (struct inode *, int);
- int (*drop) (struct inode *);
- int (*alloc_space) (struct inode *, qsize_t, int);
- int (*alloc_inode) (const struct inode *, unsigned long);
- int (*free_space) (struct inode *, qsize_t);
- int (*free_inode) (const struct inode *, unsigned long);
- int (*transfer) (struct inode *, struct iattr *);
int (*write_dquot) (struct dquot *);
int (*acquire_dquot) (struct dquot *);
int (*release_dquot) (struct dquot *);
@@ -479,13 +472,6 @@ a proper locking wrt the filesystem and call the generic quota operations.
What filesystem should expect from the generic quota functions:
FS recursion Held locks when called
-initialize: yes maybe dqonoff_sem
-drop: yes -
-alloc_space: ->mark_dirty() -
-alloc_inode: ->mark_dirty() -
-free_space: ->mark_dirty() -
-free_inode: ->mark_dirty() -
-transfer: yes -
write_dquot: yes dqonoff_sem or dqptr_sem
acquire_dquot: yes dqonoff_sem or dqptr_sem
release_dquot: yes dqonoff_sem or dqptr_sem
@@ -495,10 +481,6 @@ write_info: yes dqonoff_sem
FS recursion means calling ->quota_read() and ->quota_write() from superblock
operations.
-->alloc_space(), ->alloc_inode(), ->free_space(), ->free_inode() are called
-only directly by the filesystem and do not call any fs functions only
-the ->mark_dirty() operation.
-
More details about quota locking can be found in fs/dquot.c.
--------------------------- vm_operations_struct -----------------------------