On Tue, Apr 30, 2019 at 12:09:57PM +0300, Kirill Tkhai wrote: > > This looks OK for me. > > But speaking about existing code it's a secret for me, why we ignore arg_lock > in binfmt code, e.g. in load_elf_binary().
Well, strictly speaking we probably should but you know setup of the @arg_start by kernel's elf loader doesn't cause any side effects as far as I can tell (its been working this lockless way for years, mmap_sem is taken later in the loader code). Though for consistency sake we probably should set it up under the spinlock.
