Re: linux-next: build failure after merge of the net-next tree
From: Stephen Rothwell
Date: Sun Aug 15 2021 - 08:04:48 EST
On Mon, 9 Aug 2021 15:21:41 +0200 Arnd Bergmann <arnd@xxxxxxxx> wrote:
> On Mon, Aug 9, 2021 at 12:20 PM Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote:
> > After merging the net-next tree, today's linux-next build (powerpc
> > allyesconfig) failed like this:
> > drivers/net/ethernet/cirrus/cs89x0.c: In function 'net_open':
> > drivers/net/ethernet/cirrus/cs89x0.c:897:20: error: implicit declaration of function 'isa_virt_to_bus' [-Werror=implicit-function-declaration]
> > 897 | (unsigned long)isa_virt_to_bus(lp->dma_buff));
> > | ^~~~~~~~~~~~~~~
> Thank you for the report! I already sent a patch for m68knommu running into
> this issue, but it seems there are other architectures that still have it.
> The driver checks CONFIG_ISA_DMA_API at compile time to determine
> whether isa_virt_to_bus(), set_dma_mode(), set_dma_addr(), ... are all
> It seems that isa_virt_to_bus() is only implemented on most of the
> architectures that set ISA_DMA_API: alpha, arm, mips, parisc and x86,
> but not on m68k/coldfire and powerpc.
> Before my patch, the platform driver could only be built on ARM,
> so maybe we should just go back to that dependency or something
> depends on ARM || ((X86 || !ISA_DMA_API) && COMPILE_TEST)
> for extra build coverage. Then again, it's hard to find any machine
> actually using these: we have a couple of s3c24xx machines that
> use the wrong device name, so the device never gets probed, the imx
> machines that used to work are gone, and the ep7211-edb7211.dts
> is missing a device node for it. Most likely, neither the platform nor
> the ISA driver are actually used by anyone.
I am still applying my patch removing COMPILE_TEST from this driver ..
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