linux-kernel - Re: [PATCH] openrisc: remove CONFIG_SET

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Date:   Mon, 7 Feb 2022 16:23:59 +0900
From:   Stafford Horne <shorne@...il.com>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     LKML <linux-kernel@...r.kernel.org>, Arnd Bergmann <arnd@...db.de>,
        Jonas Bonn <jonas@...thpole.se>,
        Stefan Kristiansson <stefan.kristiansson@...nalahti.fi>,
        Randy Dunlap <rdunlap@...radead.org>,
        openrisc@...ts.librecores.org
Subject: Re: [PATCH] openrisc: remove CONFIG_SET_FS

On Sun, Feb 06, 2022 at 10:45:06PM -0800, Christoph Hellwig wrote:
> On Sun, Feb 06, 2022 at 10:36:47AM +0900, Stafford Horne wrote:
> > Remove the address space override API set_fs() used for User Mode Linux.
> 
> This ain't UML :)

Yes, Geert also brought that up.  As I mentioned there I took the text from your
commit message in commit 8bb227ac34c0 ("um: remove set_fs").

I didn't realize arch/um is for User Model Linux, I always thought um was just
some other processor!  Next, I thought your comment 'used for User Mode Linux'
was just referring to userpsace.

Now I get it!

I will fix this up in v2.

> > +	return size <= TASK_SIZE && addr <= (TASK_SIZE - size);
> 
> No need for the inner braces.

You mean to just write as:

	return size <= TASK_SIZE && addr <= TASK_SIZE - size;

I prefer keeping the braces around (TASK_SIZE - size).

-Stafford