linux-kernel - Re: [mtd-next:master 30/33] drivers/mtd/spi-nor/cadence-quadspi.c:529:4: error: implicit declaration of function 'readsl'

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Date:	Mon, 18 Jul 2016 13:20:26 -0700
From:	Brian Norris <computersforpeace@...il.com>
To:	kbuild test robot <fengguang.wu@...el.com>
Cc:	kbuild-all@...org, linux-mtd@...ts.infradead.org,
	Graham Moore <grmoore@...nsource.altera.com>,
	Marek Vasut <marex@...x.de>, linux-kernel@...r.kernel.org,
	x86@...nel.org
Subject: Re: [mtd-next:master 30/33]
 drivers/mtd/spi-nor/cadence-quadspi.c:529:4: error: implicit declaration of
 function 'readsl'

On Tue, Jul 19, 2016 at 03:43:17AM +0800, kbuild test robot wrote:
> tree:   git://git.infradead.org/linux-mtd-next.git master
> head:   f78921b9020c510ed222a6c2402e2aa126432415
> commit: 140623410536905fa6ab737b625decfde6c64a72 [30/33] mtd: spi-nor: Add driver for Cadence Quad SPI Flash Controller
> config: x86_64-allmodconfig (attached as .config)
> compiler: gcc-6 (Debian 6.1.1-1) 6.1.1 20160430
> reproduce:
>         git checkout 140623410536905fa6ab737b625decfde6c64a72
>         # save the attached .config to linux build tree
>         make ARCH=x86_64 
> 
> All errors (new ones prefixed by >>):
> 
>    drivers/mtd/spi-nor/cadence-quadspi.c: In function 'cqspi_indirect_read_execute':
> >> drivers/mtd/spi-nor/cadence-quadspi.c:529:4: error: implicit declaration of function 'readsl' [-Werror=implicit-function-declaration]
>        readsl(ahb_base, rxbuf, DIV_ROUND_UP(bytes_to_read, 4));
>        ^~~~~~
>    drivers/mtd/spi-nor/cadence-quadspi.c: In function 'cqspi_indirect_write_execute':
> >> drivers/mtd/spi-nor/cadence-quadspi.c:613:3: error: implicit declaration of function 'writesl' [-Werror=implicit-function-declaration]
>       writesl(cqspi->ahb_base, txbuf, DIV_ROUND_UP(write_bytes, 4));
>       ^~~~~~~
>    cc1: some warnings being treated as errors

Hmm, does x86 not define readsl()/writesl()? I can never tell what
accessors are supposed to be "standard" across architectures.

Either we need to drop the COMPILE_TEST or maybe make it (!X86 &&
COMPILE_TEST).

Brian