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authorDave Chinner <dchinner@redhat.com>2011-03-22 22:23:39 +1100
committerAl Viro <viro@zeniv.linux.org.uk>2011-03-24 21:16:32 -0400
commitf283c86afe6aa70b733d1ecebad5d9464943b774 (patch)
treebeaeca959996f2d8a00a997c56932dc5916bfec8 /Documentation/filesystems/vfs.txt
parent02afc410f363f98ac4f186341e38dcec13fc0e60 (diff)
fs: remove inode_lock from iput_final and prune_icache
Now that inode state changes are protected by the inode->i_lock and the inode LRU manipulations by the inode_lru_lock, we can remove the inode_lock from prune_icache and the initial part of iput_final(). instead of using the inode_lock to protect the inode during iput_final, use the inode->i_lock instead. This protects the inode against new references being taken while we change the inode state to I_FREEING, as well as preventing prune_icache from grabbing the inode while we are manipulating it. Hence we no longer need the inode_lock in iput_final prior to setting I_FREEING on the inode. For prune_icache, we no longer need the inode_lock to protect the LRU list, and the inodes themselves are protected against freeing races by the inode->i_lock. Hence we can lift the inode_lock from prune_icache as well. Signed-off-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'Documentation/filesystems/vfs.txt')
-rw-r--r--Documentation/filesystems/vfs.txt2
1 files changed, 1 insertions, 1 deletions
diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt
index 306f0ae8df0..80815ed654c 100644
--- a/Documentation/filesystems/vfs.txt
+++ b/Documentation/filesystems/vfs.txt
@@ -254,7 +254,7 @@ or bottom half).
should be synchronous or not, not all filesystems check this flag.
drop_inode: called when the last access to the inode is dropped,
- with the inode_lock spinlock held.
+ with the inode->i_lock spinlock held.
This method should be either NULL (normal UNIX filesystem
semantics) or "generic_delete_inode" (for filesystems that do not