linux-kernel - Re: [PATCH v2 2/3] devres: Add devm_ioremap_shared

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 for Android: free password hash cracker in your pocket

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

Date:   Wed, 24 Jan 2018 18:21:38 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Ladislav Michl <ladis@...ux-mips.org>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "open list:MEMORY TECHNOLOGY..." <linux-mtd@...ts.infradead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Tom Lendacky <thomas.lendacky@....com>,
        Borislav Petkov <bp@...e.de>, Ingo Molnar <mingo@...nel.org>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Philippe Ombredanne <pombredanne@...b.com>,
        Kate Stewart <kstewart@...uxfoundation.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Boris Brezillon <boris.brezillon@...e-electrons.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Wei Yongjun <weiyongjun1@...wei.com>
Subject: Re: [PATCH v2 2/3] devres: Add devm_ioremap_shared_resource()

On Wed, Jan 24, 2018 at 12:07 PM, Ladislav Michl <ladis@...ux-mips.org> wrote:
> Implement managed ioremap function for shared resources.

> +#define devm_ioremap_resource(dev, res) \
> +       __devm_ioremap_resource(dev, res, false)
> +#define devm_ioremap_shared_resource(dev, res) \
> +       __devm_ioremap_resource(dev, res, true)
> +void __iomem *__devm_ioremap_resource(struct device *dev, struct resource *res,
> +                                     bool shared);

I would rather do the following:

_resource() ->  _resource_exclusive()

#define _resource()  _resource_exclusive()

Add _resource_shared()

And use long names below in this file whenever refer to exclusive or
shared variant.

>  void devm_iounmap(struct device *dev, void __iomem *addr);
>  int check_signature(const volatile void __iomem *io_addr,
>                         const unsigned char *signature, int length);
> +
>  void devm_ioremap_release(struct device *dev, void *res);

This part doesn't belong to the change.

> + * When possible, use devm_ioremap_resource() or
> + * devm_ioremap_shared_resource() instead.
> - * Checks that a resource is a valid memory region, requests the memory
> - * region and ioremaps it. All operations are managed and will be undone
> - * on driver detach.
> + * Checks that a resource is a valid memory region, eventually requests the
> + * memory region and ioremaps it. All operations are managed and will be
> + * undone on driver detach.

Wording is changed and no clue in commit message why.


-- 
With Best Regards,
Andy Shevchenko