linux-kernel - Re: [RFC/RFT 01/10] i2c: add 'is_suspended' flag for i2c adapters

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: <20181218233354.pie5i3lvrrhq5q2c@ninjato>
Date:   Wed, 19 Dec 2018 00:33:54 +0100
From:   Wolfram Sang <wsa@...-dreams.de>
To:     Peter Rosin <peda@...ntia.se>
Cc:     Wolfram Sang <wsa+renesas@...g-engineering.com>,
        "linux-i2c@...r.kernel.org" <linux-i2c@...r.kernel.org>,
        "linux-renesas-soc@...r.kernel.org" 
        <linux-renesas-soc@...r.kernel.org>,
        Hans de Goede <hdegoede@...hat.com>,
        "linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [RFC/RFT 01/10] i2c: add 'is_suspended' flag for i2c adapters


> > +	unsigned int is_suspended:1;	/* owned by the I2C core */
> 
> When more stuff is added to this bit field (which always happens at
> some point) updates to all members of the bit field will have to use
> the same root-adapter-locking, or we will suffer from RMW-races. So
> this feels like an invitation for future disaster. Maybe a comment
> about that to remind our future selves? Or perhaps the bit field
> should be avoided altogether?

Changed to bool. Thanks!


Download attachment "signature.asc" of type "application/pgp-signature" (834 bytes)