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59200f4526
Set the things up for kernel-initiated creation of object in a tree-in-dcache filesystem. With respect to locking it's an equivalent of filename_create() - we either get a negative dentry with locked parent, or ERR_PTR() and no locks taken. tracefs and debugfs had that open-coded as part of their object creation machinery; switched to calling new helper. Reviewed-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>