fs: dcache per-inode inode alias locking
dcache_inode_lock can be replaced with per-inode locking. Use existing
inode->i_lock for this. This is slightly non-trivial because we sometimes
need to find the inode from the dentry, which requires d_inode to be
stabilised (either with refcount or d_lock).
Signed-off-by: Nick Piggin <npiggin@kernel.dk>
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 2a239d8..a853a89 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -809,14 +809,14 @@
{
struct dentry *dentry;
- spin_lock(&dcache_inode_lock);
+ spin_lock(&inode->i_lock);
list_for_each_entry(dentry, &inode->i_dentry, d_alias) {
if (!d_unhashed(dentry) || IS_ROOT(dentry)) {
- spin_unlock(&dcache_inode_lock);
+ spin_unlock(&inode->i_lock);
return true;
}
}
- spin_unlock(&dcache_inode_lock);
+ spin_unlock(&inode->i_lock);
return false;
}
