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authorNick Piggin <npiggin@kernel.dk>2011-01-07 01:49:32 -0500
committerNick Piggin <npiggin@kernel.dk>2011-01-07 01:50:21 -0500
commitb7ab39f631f505edc2bbdb86620d5493f995c9da (patch)
tree62be97ebc7fc69ceb601f23312d335ebb8038ee7 /fs/ecryptfs
parent2304450783dfde7b0b94ae234edd0dbffa865073 (diff)
fs: dcache scale dentry refcount
Make d_count non-atomic and protect it with d_lock. This allows us to ensure a 0 refcount dentry remains 0 without dcache_lock. It is also fairly natural when we start protecting many other dentry members with d_lock. Signed-off-by: Nick Piggin <npiggin@kernel.dk>
Diffstat (limited to 'fs/ecryptfs')
-rw-r--r--fs/ecryptfs/inode.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index a1ed7a7cb173..5e5c7ec1fc98 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -260,7 +260,7 @@ int ecryptfs_lookup_and_interpose_lower(struct dentry *ecryptfs_dentry,
260 ecryptfs_dentry->d_parent)); 260 ecryptfs_dentry->d_parent));
261 lower_inode = lower_dentry->d_inode; 261 lower_inode = lower_dentry->d_inode;
262 fsstack_copy_attr_atime(ecryptfs_dir_inode, lower_dir_dentry->d_inode); 262 fsstack_copy_attr_atime(ecryptfs_dir_inode, lower_dir_dentry->d_inode);
263 BUG_ON(!atomic_read(&lower_dentry->d_count)); 263 BUG_ON(!lower_dentry->d_count);
264 ecryptfs_set_dentry_private(ecryptfs_dentry, 264 ecryptfs_set_dentry_private(ecryptfs_dentry,
265 kmem_cache_alloc(ecryptfs_dentry_info_cache, 265 kmem_cache_alloc(ecryptfs_dentry_info_cache,
266 GFP_KERNEL)); 266 GFP_KERNEL));