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authorLinus Torvalds <torvalds@linux-foundation.org>2009-01-01 02:57:56 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2009-01-01 02:57:56 +0300
commitb58602a4bac012b5f4fc12fe6b46ab237b610d5d (patch)
tree38929e210a723f67fe2b945f37264bf3aae3c2c4 /Documentation
parentdb200df0b3530f673d8e9f5bd535e9e10305842a (diff)
parent1f3403fa640f9f7b135dee79f2d39d01c8ad4a08 (diff)
downloadlinux-b58602a4bac012b5f4fc12fe6b46ab237b610d5d.tar.xz
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (34 commits) nfsd race fixes: jfs nfsd race fixes: reiserfs nfsd race fixes: ext4 nfsd race fixes: ext3 nfsd race fixes: ext2 nfsd/create race fixes, infrastructure filesystem notification: create fs/notify to contain all fs notification fs/block_dev.c: __read_mostly improvement and sb_is_blkdev_sb utilization kill ->dir_notify() filp_cachep can be static in fs/file_table.c fix f_count description in Documentation/filesystems/files.txt make INIT_FS use the __RW_LOCK_UNLOCKED initialization take init_fs to saner place kill vfs_permission pass a struct path * to may_open kill walk_init_root remove incorrect comment in inode_permission expand some comments (d_path / seq_path) correct wrong function name of d_put in kernel document and source comment fix switch_names() breakage in short-to-short case ...
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/filesystems/Locking2
-rw-r--r--Documentation/filesystems/files.txt6
-rw-r--r--Documentation/filesystems/vfs.txt5
3 files changed, 4 insertions, 9 deletions
diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking
index 23d2f4460deb..ccec55394380 100644
--- a/Documentation/filesystems/Locking
+++ b/Documentation/filesystems/Locking
@@ -394,7 +394,6 @@ prototypes:
unsigned long (*get_unmapped_area)(struct file *, unsigned long,
unsigned long, unsigned long, unsigned long);
int (*check_flags)(int);
- int (*dir_notify)(struct file *, unsigned long);
};
locking rules:
@@ -424,7 +423,6 @@ sendfile: no
sendpage: no
get_unmapped_area: no
check_flags: no
-dir_notify: no
->llseek() locking has moved from llseek to the individual llseek
implementations. If your fs is not using generic_file_llseek, you
diff --git a/Documentation/filesystems/files.txt b/Documentation/filesystems/files.txt
index bb0142f61084..ac2facc50d2a 100644
--- a/Documentation/filesystems/files.txt
+++ b/Documentation/filesystems/files.txt
@@ -76,13 +76,13 @@ the fdtable structure -
5. Handling of the file structures is special. Since the look-up
of the fd (fget()/fget_light()) are lock-free, it is possible
that look-up may race with the last put() operation on the
- file structure. This is avoided using atomic_inc_not_zero()
+ file structure. This is avoided using atomic_long_inc_not_zero()
on ->f_count :
rcu_read_lock();
file = fcheck_files(files, fd);
if (file) {
- if (atomic_inc_not_zero(&file->f_count))
+ if (atomic_long_inc_not_zero(&file->f_count))
*fput_needed = 1;
else
/* Didn't get the reference, someone's freed */
@@ -92,7 +92,7 @@ the fdtable structure -
....
return file;
- atomic_inc_not_zero() detects if refcounts is already zero or
+ atomic_long_inc_not_zero() detects if refcounts is already zero or
goes to zero during increment. If it does, we fail
fget()/fget_light().
diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt
index 5579bda58a6d..ef19afa186a9 100644
--- a/Documentation/filesystems/vfs.txt
+++ b/Documentation/filesystems/vfs.txt
@@ -733,7 +733,6 @@ struct file_operations {
ssize_t (*sendpage) (struct file *, struct page *, int, size_t, loff_t *, int);
unsigned long (*get_unmapped_area)(struct file *, unsigned long, unsigned long, unsigned long, unsigned long);
int (*check_flags)(int);
- int (*dir_notify)(struct file *filp, unsigned long arg);
int (*flock) (struct file *, int, struct file_lock *);
ssize_t (*splice_write)(struct pipe_inode_info *, struct file *, size_t, unsigned int);
ssize_t (*splice_read)(struct file *, struct pipe_inode_info *, size_t, unsigned int);
@@ -800,8 +799,6 @@ otherwise noted.
check_flags: called by the fcntl(2) system call for F_SETFL command
- dir_notify: called by the fcntl(2) system call for F_NOTIFY command
-
flock: called by the flock(2) system call
splice_write: called by the VFS to splice data from a pipe to a file. This
@@ -931,7 +928,7 @@ manipulate dentries:
d_lookup: look up a dentry given its parent and path name component
It looks up the child of that given name from the dcache
hash table. If it is found, the reference count is incremented
- and the dentry is returned. The caller must use d_put()
+ and the dentry is returned. The caller must use dput()
to free the dentry when it finishes using it.
For further information on dentry locking, please refer to the document