Re: [PATCH 18/23] init: open code setting up stdin/stdout/stderr

[Christoph Hellwig]

On Mon, Jul 27, 2020 at 04:05:34AM +0100, Al Viro wrote:
> On Tue, Jul 14, 2020 at 09:04:22PM +0200, Christoph Hellwig wrote:
> > Don't rely on the implicit set_fs(KERNEL_DS) for ksys_open to work, but
> > instead open a struct file for /dev/console and then install it as FD
> > 0/1/2 manually.
> 
> I really hate that one.  Every time we exposed the internal details to
> the fucking early init code, we paid for that afterwards.  And this
> goes over the top wrt the level of details being exposed.
> 
> _IF_ you want to keep that thing, move it to fs/file.c, with dire comment
> re that being very special shite for init and likely cause of subsequent
> trouble whenever anything gets changed, a gnat farts somewhere, etc.

Err, while I'm all for keeping internals internal, fd_install and
get_unused_fd_flags are exported routines with tons of users of this
pattern all over.