linux-kernel - Re: [PATCH 1/2] sparc32: Move ioremap/iounmap declaration before asm-generic/io.h include

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Date:   Tue, 15 Sep 2020 15:14:52 +0100
From:   Christoph Hellwig <hch@...radead.org>
To:     Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Cc:     linux-kernel@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>, linux-pci@...r.kernel.org,
        linux-arch@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, Arnd Bergmann <arnd@...db.de>,
        George Cherian <george.cherian@...vell.com>,
        Yang Yingliang <yangyingliang@...wei.com>
Subject: Re: [PATCH 1/2] sparc32: Move ioremap/iounmap declaration before
 asm-generic/io.h include

> diff --git a/arch/sparc/include/asm/io_32.h b/arch/sparc/include/asm/io_32.h
> index 9a52d9506f80..042201c79ad1 100644
> --- a/arch/sparc/include/asm/io_32.h
> +++ b/arch/sparc/include/asm/io_32.h
> @@ -11,6 +11,16 @@
>  #define memcpy_fromio(d,s,sz) _memcpy_fromio(d,s,sz)
>  #define memcpy_toio(d,s,sz)   _memcpy_toio(d,s,sz)
>  
> +#ifdef __KERNEL__
> +
> +/*
> + * Bus number may be embedded in the higher bits of the physical address.
> + * This is why we have no bus number argument to ioremap().
> + */
> +void __iomem *ioremap(phys_addr_t offset, size_t size);
> +void iounmap(volatile void __iomem *addr);
> +#endif

No need for an __KERNEL__ in non-uapi headers.