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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/Locking
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/Locking')
-rw-r--r--Documentation/filesystems/Locking2
1 files changed, 1 insertions, 1 deletions
diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking
index 2e994efe12c..61b31acb917 100644
--- a/Documentation/filesystems/Locking
+++ b/Documentation/filesystems/Locking
@@ -128,7 +128,7 @@ alloc_inode:
destroy_inode:
dirty_inode: (must not sleep)
write_inode:
-drop_inode: !!!inode_lock!!!
+drop_inode: !!!inode->i_lock!!!
evict_inode:
put_super: write
write_super: read