Bug#598503: [PATCH] qla4xxx: Fix build on some architectures lacking 64-bit I/O

[Vikas Chaudhary <vikas.chaudhary@qlogic.com>]

On Oct 1, 2010, at 8:41 AM, Ben Hutchings wrote:

> readq() and writeq() are not defined on all archictectures.  Where
> they are missing, define fallback implementations (copied from
> qla2xxx).
>
> Reference: http://bugs.debian.org/598503
> Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
> ---
> This is a regression from 2.6.35, so please include this fix in  
> 2.6.36.
>
> Ben.
>
> drivers/scsi/qla4xxx/ql4_nx.h |   15 +++++++++++++++
> 1 files changed, 15 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/scsi/qla4xxx/ql4_nx.h b/drivers/scsi/qla4xxx/ 
> ql4_nx.h
> index 931ad3f..85fe6cf 100644
> --- a/drivers/scsi/qla4xxx/ql4_nx.h
> +++ b/drivers/scsi/qla4xxx/ql4_nx.h
> @@ -776,4 +776,19 @@ struct crb_addr_pair {
> #define MIU_TEST_AGT_WRDATA_UPPER_LO	(0x0b0)
> #define	MIU_TEST_AGT_WRDATA_UPPER_HI	(0x0b4)
>
> +#ifndef readq
> +static inline u64 readq(void __iomem *addr)
> +{
> +	return readl(addr) | (((u64) readl(addr + 4)) << 32LL);
> +}
> +#endif
> +
> +#ifndef writeq
> +static inline void writeq(u64 val, void __iomem *addr)
> +{
> +	writel(((u32) (val)), (addr));
> +	writel(((u32) (val >> 32)), (addr + 4));
> +}
> +#endif
> +
> #endif
> --
> 1.7.1

Ack-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com>