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authorLinus Torvalds <torvalds@linux-foundation.org>2009-03-26 19:14:02 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2009-03-26 19:14:02 -0400
commit8e9d2089723d08d51e66c5eea49253d76e27941e (patch)
treecf15609d5eeb0c1f3a39231d8ce793d3c8ad0ed0 /Documentation/filesystems
parentba1eb95cf3cc666769afe42eaa15a3a34ae82f94 (diff)
parent60aa49243d09afc873f082567d2e3c16634ced84 (diff)
Merge branch 'bkl-removal' of git://git.lwn.net/linux-2.6
* 'bkl-removal' of git://git.lwn.net/linux-2.6: Rationalize fasync return values Move FASYNC bit handling to f_op->fasync() Use f_lock to protect f_flags Rename struct file->f_ep_lock
Diffstat (limited to 'Documentation/filesystems')
-rw-r--r--Documentation/filesystems/Locking7
1 files changed, 5 insertions, 2 deletions
diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking
index ec6a9392a173..4e78ce677843 100644
--- a/Documentation/filesystems/Locking
+++ b/Documentation/filesystems/Locking
@@ -437,8 +437,11 @@ grab BKL for cases when we close a file that had been opened r/w, but that
437can and should be done using the internal locking with smaller critical areas). 437can and should be done using the internal locking with smaller critical areas).
438Current worst offender is ext2_get_block()... 438Current worst offender is ext2_get_block()...
439 439
440->fasync() is a mess. This area needs a big cleanup and that will probably 440->fasync() is called without BKL protection, and is responsible for
441affect locking. 441maintaining the FASYNC bit in filp->f_flags. Most instances call
442fasync_helper(), which does that maintenance, so it's not normally
443something one needs to worry about. Return values > 0 will be mapped to
444zero in the VFS layer.
442 445
443->readdir() and ->ioctl() on directories must be changed. Ideally we would 446->readdir() and ->ioctl() on directories must be changed. Ideally we would
444move ->readdir() to inode_operations and use a separate method for directory 447move ->readdir() to inode_operations and use a separate method for directory