Re: [git pull] vfs.git pile 2

[Linus Torvalds]

On Fri, Dec 16, 2016 at 2:12 PM, Al Viro <viro@xxxxxxxxxxxxxxxxxx> wrote:
> In this pile:
>         * autofs-namespace series
>         * dedupe stuff
>         * more struct path constification

When looking at the conflict, I looked at that part of
vfs_clone_file_prep_inodes(), and reacted to the insanity.

WTF?

        /* Zero length dedupe exits immediately; reflink goes to EOF. */
        if (*len == 0) {
                if (is_dedupe) {
                        *len = 0;
                        return 0;
                }
                *len = isize - pos_in;
        }

I'll just leave you to read through that part a bit more. Because
there are two completely insane things going on in that code sequence.

                Linus