linux-kernel - Re: [RFC PATCH 2/3] mm: Return bool from pagebit test functions

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20210409111636.GR2531743@casper.infradead.org>
Date:   Fri, 9 Apr 2021 12:16:36 +0100
From:   Matthew Wilcox <willy@...radead.org>
To:     David Howells <dhowells@...hat.com>
Cc:     torvalds@...ux-foundation.org,
        Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        linux-fsdevel@...r.kernel.org, jlayton@...nel.org, hch@....de,
        linux-cachefs@...hat.com, v9fs-developer@...ts.sourceforge.net,
        linux-afs@...ts.infradead.org, ceph-devel@...r.kernel.org,
        linux-cifs@...r.kernel.org, linux-nfs@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH 2/3] mm: Return bool from pagebit test functions

On Fri, Apr 09, 2021 at 11:59:17AM +0100, David Howells wrote:
> Make functions that test page bits return a bool, not an int.  This means
> that the value is definitely 0 or 1 if they're used in arithmetic, rather
> than rely on test_bit() and friends to return this (though they probably
> should).

iirc i looked at doing this as part of the folio work, and it ended up
increasing the size of the kernel.  Did you run bloat-o-meter on the
result of doing this?