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-rw-r--r--Documentation/filesystems/Locking9
1 files changed, 5 insertions, 4 deletions
diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking
index 1045da582b9b..d31efbbdfe50 100644
--- a/Documentation/filesystems/Locking
+++ b/Documentation/filesystems/Locking
@@ -99,7 +99,7 @@ prototypes:
99 int (*sync_fs)(struct super_block *sb, int wait); 99 int (*sync_fs)(struct super_block *sb, int wait);
100 void (*write_super_lockfs) (struct super_block *); 100 void (*write_super_lockfs) (struct super_block *);
101 void (*unlockfs) (struct super_block *); 101 void (*unlockfs) (struct super_block *);
102 int (*statfs) (struct super_block *, struct kstatfs *); 102 int (*statfs) (struct dentry *, struct kstatfs *);
103 int (*remount_fs) (struct super_block *, int *, char *); 103 int (*remount_fs) (struct super_block *, int *, char *);
104 void (*clear_inode) (struct inode *); 104 void (*clear_inode) (struct inode *);
105 void (*umount_begin) (struct super_block *); 105 void (*umount_begin) (struct super_block *);
@@ -142,15 +142,16 @@ see also dquot_operations section.
142 142
143--------------------------- file_system_type --------------------------- 143--------------------------- file_system_type ---------------------------
144prototypes: 144prototypes:
145 struct super_block *(*get_sb) (struct file_system_type *, int, 145 struct int (*get_sb) (struct file_system_type *, int,
146 const char *, void *); 146 const char *, void *, struct vfsmount *);
147 void (*kill_sb) (struct super_block *); 147 void (*kill_sb) (struct super_block *);
148locking rules: 148locking rules:
149 may block BKL 149 may block BKL
150get_sb yes yes 150get_sb yes yes
151kill_sb yes yes 151kill_sb yes yes
152 152
153->get_sb() returns error or a locked superblock (exclusive on ->s_umount). 153->get_sb() returns error or 0 with locked superblock attached to the vfsmount
154(exclusive on ->s_umount).
154->kill_sb() takes a write-locked superblock, does all shutdown work on it, 155->kill_sb() takes a write-locked superblock, does all shutdown work on it,
155unlocks and drops the reference. 156unlocks and drops the reference.
156 157