linux-kernel - Re: [PATCH] irq_work: improve the flag definitions

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: <CAHp75VcqQGgkkuoxpNheBPDtjWqY1CGAVd1RS2Vh0Kp29vfOLQ@mail.gmail.com>
Date:   Mon, 14 Aug 2017 15:19:32 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Bartosz Golaszewski <brgl@...ev.pl>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Marc Zyngier <marc.zyngier@....com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] irq_work: improve the flag definitions

On Mon, Aug 14, 2017 at 2:56 PM, Bartosz Golaszewski <brgl@...ev.pl> wrote:
> IRQ_WORK_FLAGS is defined simply to 3UL. This is confusing as it
> says nothing about its purpose. Define IRQ_WORK_FLAGS as a bitwise
> OR of IRQ_WORK_PENDING and IRQ_WORK_BUSY.
>
> While we're at it: use the BIT() macro for all flags.

> +#define IRQ_WORK_PENDING       BIT(0)
> +#define IRQ_WORK_BUSY          BIT(1)
> +#define IRQ_WORK_FLAGS         (IRQ_WORK_PENDING | IRQ_WORK_BUSY)

I dunno which style is preferred, though I would go with simple
GENMASK() here, as all definitions right on left :-)

Parameters of GENMASK will show last-first entries and can be easily decoded.
Although there are only two for now.

-- 
With Best Regards,
Andy Shevchenko