linux-kernel - Re: [PATCH v4 4/6] infiniband: cxgb4: Eliminate duplicate barriers on weakly-ordered archs

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Date:   Thu, 22 Mar 2018 08:24:42 -0400
From:   okaya@...eaurora.org
To:     kbuild test robot <lkp@...el.com>
Cc:     kbuild-all@...org, linux-rdma@...r.kernel.org,
        timur@...eaurora.org, sulrich@...eaurora.org,
        linux-arm-msm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Steve Wise <swise@...lsio.com>,
        Doug Ledford <dledford@...hat.com>,
        Jason Gunthorpe <jgg@...pe.ca>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 4/6] infiniband: cxgb4: Eliminate duplicate barriers on
 weakly-ordered archs

On 2018-03-22 02:44, kbuild test robot wrote:
> Hi Sinan,
> 
> Thank you for the patch! Yet something to improve:
> 
> [auto build test ERROR on linus/master]
> [also build test ERROR on v4.16-rc6 next-20180321]
> [if your patch is applied to the wrong git tree, please drop us a note
> to help improve the system]
> 
> url:
> https://github.com/0day-ci/linux/commits/Sinan-Kaya/ib-Eliminate-duplicate-barriers-on-weakly-ordered-archs/20180321-091659
> config: xtensa-allyesconfig (attached as .config)
> compiler: xtensa-linux-gcc (GCC) 7.2.0
> reproduce:
>         wget
> https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross
> -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # save the attached .config to linux build tree
>         make.cross ARCH=xtensa
> 

Jason,

Can you remove the writeq change if it is too late for me to fix?

This is an infrastructural issue on xtensa arch.

Probably, it won't get fixed today.

Sinan


> All errors (new ones prefixed by >>):
> 
>    In file included from drivers/infiniband/hw/cxgb4/iw_cxgb4.h:73:0,
>                     from drivers/infiniband/hw/cxgb4/device.c:40:
>    drivers/infiniband/hw/cxgb4/t4.h: In function 'pio_copy':
>>> drivers/infiniband/hw/cxgb4/t4.h:460:3: error: implicit declaration 
>>> of function 'writeq_relaxed'; did you mean 'writel_relaxed'? 
>>> [-Werror=implicit-function-declaration]
>       writeq_relaxed(*src, dst);
>       ^~~~~~~~~~~~~~
>       writel_relaxed
>    cc1: some warnings being treated as errors
> 
> vim +460 drivers/infiniband/hw/cxgb4/t4.h
> 
>    450
>    451	/* This function copies 64 byte coalesced work request to memory
>    452	 * mapped BAR2 space. For coalesced WRs, the SGE fetches data
>    453	 * from the FIFO instead of from Host.
>    454	 */
>    455	static inline void pio_copy(u64 __iomem *dst, u64 *src)
>    456	{
>    457		int count = 8;
>    458
>    459		while (count) {
>  > 460			writeq_relaxed(*src, dst);
>    461			src++;
>    462			dst++;
>    463			count--;
>    464		}
>    465	}
>    466
> 
> ---
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