linux-kernel - Re: [PATCH v2 4/8] powerpc: add io{read,write}64 accessors

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Date:	Mon, 9 May 2016 08:20:13 +0000
From:	Horia Ioan Geanta Neag <horia.geanta@....com>
To:	Herbert Xu <herbert@...dor.apana.org.au>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	"Michael Ellerman" <mpe@...erman.id.au>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Cristian Stoica" <cristian.stoica@....com>,
	Scott Wood <scott.wood@....com>,
	"linux-crypto@...r.kernel.org" <linux-crypto@...r.kernel.org>,
	"Tudor-Dan Ambarus" <tudor-dan.ambarus@....com>,
	"linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
	"David S. Miller" <davem@...emloft.net>,
	Alexandru Porosanu <alexandru.porosanu@....com>
Subject: Re: [PATCH v2 4/8] powerpc: add io{read,write}64 accessors

On 5/5/2016 6:37 PM, Horia Geantă wrote:
> This will allow device drivers to consistently use io{read,write}XX
> also for 64-bit accesses.
> 
> Signed-off-by: Horia Geantă <horia.geanta@....com>

It would be great if PPC maintainers could Ack this patch.

As stated in the cover letter: https://lkml.org/lkml/2016/5/5/340
I'd like to go with the whole patch set via cryptodev-2.6 tree.

Thanks,
Horia

> ---
>  arch/powerpc/kernel/iomap.c | 24 ++++++++++++++++++++++++
>  1 file changed, 24 insertions(+)
> 
> diff --git a/arch/powerpc/kernel/iomap.c b/arch/powerpc/kernel/iomap.c
> index 12e48d56f771..3963f0b68d52 100644
> --- a/arch/powerpc/kernel/iomap.c
> +++ b/arch/powerpc/kernel/iomap.c
> @@ -38,6 +38,18 @@ EXPORT_SYMBOL(ioread16);
>  EXPORT_SYMBOL(ioread16be);
>  EXPORT_SYMBOL(ioread32);
>  EXPORT_SYMBOL(ioread32be);
> +#ifdef __powerpc64__
> +u64 ioread64(void __iomem *addr)
> +{
> +	return readq(addr);
> +}
> +u64 ioread64be(void __iomem *addr)
> +{
> +	return readq_be(addr);
> +}
> +EXPORT_SYMBOL(ioread64);
> +EXPORT_SYMBOL(ioread64be);
> +#endif /* __powerpc64__ */
>  
>  void iowrite8(u8 val, void __iomem *addr)
>  {
> @@ -64,6 +76,18 @@ EXPORT_SYMBOL(iowrite16);
>  EXPORT_SYMBOL(iowrite16be);
>  EXPORT_SYMBOL(iowrite32);
>  EXPORT_SYMBOL(iowrite32be);
> +#ifdef __powerpc64__
> +void iowrite64(u64 val, void __iomem *addr)
> +{
> +	writeq(val, addr);
> +}
> +void iowrite64be(u64 val, void __iomem *addr)
> +{
> +	writeq_be(val, addr);
> +}
> +EXPORT_SYMBOL(iowrite64);
> +EXPORT_SYMBOL(iowrite64be);
> +#endif /* __powerpc64__ */
>  
>  /*
>   * These are the "repeat read/write" functions. Note the
>