Re: [RFC][PATCHSET] iov_iter work

[Christoph Hellwig]

On Sun, Jun 06, 2021 at 03:46:37PM -0700, Linus Torvalds wrote:
> And yes, I realize that 'uaccess_kernel()' is hopefully always false
> on any architectures we care about and so the compiler would just pick
> one at compile time rather than actually having both those
> initializers.
> 
> But I think that "the uaccess_kernel() KVEC case is legacy for
> architectures that haven't converted to the new world order yet" thing
> is just even more of an argument for not duplicating and writing the
> code out in full on a source level (and making that normal case be
> ".iov = iov").

It can't even happen for the legacy architectures, given that the
remaining set_fs() areas are small and never do iov_iter based I/O.