linux-kernel - Re: [PATCH 13/21] m68k: rename _

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Message-ID: <CAMuHMdWaQ15j7fQ9-8XKgrSwgf96nT=yY+FCPWPxoPC9LGqvbQ@mail.gmail.com>
Date:   Fri, 18 Oct 2019 09:30:54 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Christoph Hellwig <hch@....de>
Cc:     Arnd Bergmann <arnd@...db.de>, Guo Ren <guoren@...nel.org>,
        Michal Simek <monstr@...str.eu>,
        Greentime Hu <green.hu@...il.com>,
        Vincent Chen <deanbo422@...il.com>,
        Guan Xuetao <gxt@....edu.cn>,
        "the arch/x86 maintainers" <x86@...nel.org>,
        Linux-Arch <linux-arch@...r.kernel.org>,
        linux-s390 <linux-s390@...r.kernel.org>,
        "linux-ia64@...r.kernel.org" <linux-ia64@...r.kernel.org>,
        Parisc List <linux-parisc@...r.kernel.org>,
        Linux-sh list <linux-sh@...r.kernel.org>,
        "open list:QUALCOMM HEXAGON..." <linux-hexagon@...r.kernel.org>,
        linux-xtensa@...ux-xtensa.org, linux-mips@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-m68k <linux-m68k@...ts.linux-m68k.org>,
        Openrisc <openrisc@...ts.librecores.org>,
        MTD Maling List <linux-mtd@...ts.infradead.org>,
        alpha <linux-alpha@...r.kernel.org>,
        sparclinux <sparclinux@...r.kernel.org>,
        nios2-dev@...ts.rocketboards.org, linux-riscv@...ts.infradead.org,
        arcml <linux-snps-arc@...ts.infradead.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 13/21] m68k: rename __iounmap and mark it static

Hi Christoph,

On Thu, Oct 17, 2019 at 7:53 PM Christoph Hellwig <hch@....de> wrote:
> m68k uses __iounmap as the name for an internal helper that is only
> used for some CPU types.  Mark it static and give it a better name.
>
> Signed-off-by: Christoph Hellwig <hch@....de>

Thanks for your patch!

> --- a/arch/m68k/mm/kmap.c
> +++ b/arch/m68k/mm/kmap.c
> @@ -52,6 +52,7 @@ static inline void free_io_area(void *addr)
>
>  #define IO_SIZE                (256*1024)
>
> +static void __free_io_area(void *addr, unsigned long size);
>  static struct vm_struct *iolist;
>
>  static struct vm_struct *get_io_area(unsigned long size)
> @@ -90,7 +91,7 @@ static inline void free_io_area(void *addr)
>                 if (tmp->addr == addr) {
>                         *p = tmp->next;
>                         /* remove gap added in get_io_area() */
> -                       __iounmap(tmp->addr, tmp->size - IO_SIZE);
> +                       __free_io_area(tmp->addr, tmp->size - IO_SIZE);
>                         kfree(tmp);
>                         return;
>                 }
> @@ -249,12 +250,13 @@ void iounmap(void __iomem *addr)
>  }
>  EXPORT_SYMBOL(iounmap);
>
> +#ifndef CPU_M68040_OR_M68060_ONLY

Can you please move this block up, instead of adding more #ifdef cluttery?
That would also remove the need for a forward declaration.

>  /*
> - * __iounmap unmaps nearly everything, so be careful
> + * __free_io_area unmaps nearly everything, so be careful
>   * Currently it doesn't free pointer/page tables anymore but this
>   * wasn't used anyway and might be added later.
>   */
> -void __iounmap(void *addr, unsigned long size)
> +static void __free_io_area(void *addr, unsigned long size)
>  {
>         unsigned long virtaddr = (unsigned long)addr;
>         pgd_t *pgd_dir;
> @@ -297,6 +299,7 @@ void __iounmap(void *addr, unsigned long size)
>
>         flush_tlb_all();
>  }
> +#endif /* CPU_M68040_OR_M68060_ONLY */
>
>  /*
>   * Set new cache mode for some kernel address space.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds