Re: [RFC PATCH] fs: allow open(dir, O_TMPFILE|..., 0) with mode 0

[Christoph Hellwig]

On Mon, Nov 03, 2014 at 11:04:27AM -0800, Linus Torvalds wrote:
> Oh, so you don't actually need any file contents at all?
> 
> If that is actually a real usage, then maybe we should just say that
> "O_TMPFILE|O_RDONLY" is fine, and remove the check that it has to be
> writable.

Wasn't this disallowed to prevent problems on old kernels that don't use
O_TMPFILE?  In that case we'd ignore the flag and would just get a file
handle for the directory instead.

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