Jonathan Corbet 76398425bb Move FASYNC bit handling to f_op->fasync() ... Removing the BKL from FASYNC handling ran into the challenge of keeping the setting of the FASYNC bit in filp->f_flags atomic with regard to calls to the underlying fasync() function. Andi Kleen suggested moving the handling of that bit into fasync(); this patch does exactly that. As a result, we have a couple of internal API changes: fasync() must now manage the FASYNC bit, and it will be called without the BKL held. As it happens, every fasync() implementation in the kernel with one exception calls fasync_helper(). So, if we make fasync_helper() set the FASYNC bit, we can avoid making any changes to the other fasync() functions - as long as those functions, themselves, have proper locking. Most fasync() implementations do nothing but call fasync_helper() - which has its own lock - so they are easily verified as correct. The BKL had already been pushed down into the rest. The networking code has its own version of fasync_helper(), so that code has been augmented with explicit FASYNC bit handling. Cc: Al Viro <viro@ZenIV.linux.org.uk> Cc: David Miller <davem@davemloft.net> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jonathan Corbet <corbet@lwn.net>		2009-03-16 08:32:27 -06:00
..
configfs	docsrc: build Documentation/ sources	2008-08-12 16:07:30 -07:00
9p.txt	9p: add virtio transport	2007-10-23 13:47:31 -05:00
00-INDEX	Documentation: move rpc-cache.txt to filesystems/	2008-04-11 13:20:52 -06:00
adfs.txt	Fix typos in /Documentation : 'U-Z'	2006-11-30 04:58:40 +01:00
affs.txt
afs.txt	[AFS]: Update the AFS fs documentation.	2007-04-26 15:57:43 -07:00
autofs4-mount-control.txt	autofs4: device node ioctl documentation	2008-10-16 11:21:39 -07:00
automount-support.txt	VFS: Unexport do_kern_mount() and clean up simple_pin_fs()	2006-06-09 09:34:16 -04:00
befs.txt	Fix typos in Documentation/: 'Q'-'R'	2006-10-03 22:54:15 +02:00
bfs.txt	remove mention of CONFIG_KMOD from documentation	2008-07-22 19:24:29 +10:00
btrfs.txt	Btrfs: Add Documentation/filesystem/btrfs.txt, remove old COPYING	2009-01-07 09:54:24 -05:00
cifs.txt
coda.txt
cramfs.txt
dentry-locking.txt
devpts.txt	Document usage of multiple-instances of devpts	2009-01-02 10:19:36 -08:00
directory-locking	Documentation: Fix up docs still talking about i_sem	2007-05-24 10:16:17 -07:00
dlmfs.txt	Fix typos in Documentation/: 'D'-'E'	2006-10-03 22:47:42 +02:00
dnotify.txt	Documentation: move dnotify.txt to filesystems/	2008-02-07 08:42:17 -08:00
ecryptfs.txt	eCryptfs: Move ecryptfs docs into Documentation/filesystems/	2007-07-17 10:23:08 -07:00
Exporting	exportfs: update documentation	2007-10-22 08:13:21 -07:00
ext2.txt	trivial: fix bad links in the ext2 and ext3 documentation	2009-03-12 16:24:25 -07:00
ext3.txt	trivial: fix bad links in the ext2 and ext3 documentation	2009-03-12 16:24:25 -07:00
ext4.txt	ext4: Remove "extents" mount option	2009-01-06 14:53:16 -05:00
fiemap.txt	vfs: vfs-level fiemap interface	2008-10-08 19:44:18 -04:00
files.txt	fix f_count description in Documentation/filesystems/files.txt	2008-12-31 18:07:42 -05:00
fuse.txt	[PATCH] fuse: fix typo	2006-12-30 10:56:45 -08:00
gfs2-glocks.txt	[GFS2] Glock documentation	2008-06-27 09:39:53 +01:00
gfs2.txt	[GFS2] Update documentation	2006-04-25 15:44:04 -04:00
hfs.txt
hfsplus.txt	Documentation: document HFSPlus	2007-07-31 15:39:38 -07:00
hpfs.txt	misc doc and kconfig typos	2007-05-09 08:58:15 +02:00
inotify.txt	[PATCH] inotify (5/5): update kernel documentation	2006-06-20 05:25:19 -04:00
isofs.txt	isofs: implement dmode option	2008-02-08 09:22:38 -08:00
jfs.txt	JFS: document uid, gid, and umask mount options in jfs.txt	2007-03-09 10:27:31 -06:00
Locking	Move FASYNC bit handling to f_op->fasync()	2009-03-16 08:32:27 -06:00
locks.txt	Documentation: move locks.txt in filesystems/	2007-10-09 18:32:45 -04:00
mandatory-locking.txt	locks: add warning about mandatory locking races	2007-10-09 18:32:45 -04:00
ncpfs.txt
nfs-rdma.txt	update port number in NFS/RDMA documentation	2009-01-27 17:20:14 -05:00
nfsroot.txt	doc: typo in Documentation/filesystems/nfsroot.txt	2008-10-16 11:21:31 -07:00
ntfs.txt	NTFS: update homepage	2008-09-02 19:21:37 -07:00
ocfs2.txt	ocfs2: add mount option and Kconfig option for acl	2009-01-05 08:36:52 -08:00
omfs.txt	omfs: add filesystem documentation	2008-07-26 12:00:05 -07:00
porting	iget: remove iget() and the read_inode() super op as being obsolete	2008-02-07 08:42:29 -08:00
proc.txt	mm: OOM documentation update	2009-01-29 18:04:43 -08:00
quota.txt	quota: documentation for sending "below quota" messages via netlink and tiny doc update	2008-08-12 16:07:27 -07:00
ramfs-rootfs-initramfs.txt	Trivial Documentation/filesystems/ramfs-rootfs-initramfs.txt fix	2008-11-30 11:40:56 -08:00
relay.txt	relay: add buffer-only channels; useful for early logging	2008-07-26 12:00:04 -07:00
romfs.txt
rpc-cache.txt	Documentation: move rpc-cache.txt to filesystems/	2008-04-11 13:20:52 -06:00
seq_file.txt	Document seq_path_root()	2008-04-25 11:56:37 -06:00
sharedsubtree.txt	Documentation: move sharedsubtrees.txt to filesystems/	2008-02-07 08:42:17 -08:00
smbfs.txt
spufs.txt	Fix typos in /Documentation : 'U-Z'	2006-11-30 04:58:40 +01:00
squashfs.txt	Squashfs: fix documentation typo, Cramfs filesystem limit is 256 MiB	2009-03-05 00:40:13 +00:00
sysfs-pci.txt	PCI: return error on failure to read PCI ROMs	2009-02-04 16:58:41 -08:00
sysfs.txt	PATCH [2/2] Documentation/filesystems/sysfs.txt: fix descriptions of device attributes	2009-02-22 09:28:15 -08:00
sysv-fs.txt	[PATCH] fs/sysv/: doc cleanup	2006-12-07 08:39:44 -08:00
tmpfs.txt	mempolicy: update NUMA memory policy documentation	2008-04-28 08:58:19 -07:00
ubifs.txt	UBIFS: remove fast unmounting	2009-01-29 16:34:30 +02:00
udf.txt	[PATCH] Update udf documentation to reflect current state of read/write support	2006-11-16 11:43:38 -08:00
ufs.txt	[PATCH] ufs2 write: mount as rw	2007-02-12 09:48:40 -08:00
vfat.txt	fat: Fix ATTR_RO for directory	2008-11-06 15:41:21 -08:00
vfs.txt	filesystem freeze: add error handling of write_super_lockfs/unlockfs	2009-01-09 16:54:42 -08:00
xfs.txt	[XFS] remove restricted chown parameter from xfs linux	2008-10-30 18:30:09 +11:00
xip.txt	DOC: update xip method info	2008-11-12 17:17:17 -08:00