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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-03-27 00:14:02 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-03-27 00:14:02 +0100 |
| commit | 8e9d2089723d08d51e66c5eea49253d76e27941e (patch) | |
| tree | cf15609d5eeb0c1f3a39231d8ce793d3c8ad0ed0 /Documentation | |
| parent | Merge branch 'header-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/k... (diff) | |
| parent | Rationalize fasync return values (diff) | |
| download | linux-8e9d2089723d08d51e66c5eea49253d76e27941e.tar.xz linux-8e9d2089723d08d51e66c5eea49253d76e27941e.zip | |
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')
| -rw-r--r-- | Documentation/filesystems/Locking | 7 |
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 can and should be done using the internal locking with smaller critical areas). Current worst offender is ext2_get_block()... -->fasync() is a mess. This area needs a big cleanup and that will probably -affect locking. +->fasync() is called without BKL protection, and is responsible for +maintaining the FASYNC bit in filp->f_flags. Most instances call +fasync_helper(), which does that maintenance, so it's not normally +something one needs to worry about. Return values > 0 will be mapped to +zero in the VFS layer. ->readdir() and ->ioctl() on directories must be changed. Ideally we would move ->readdir() to inode_operations and use a separate method for directory |