Arnd Bergmann raised this issue previously[1], but I assumed it would
only happen on some obscure configuration, as clearly arm
tegra_defconfig and multi_v7_defconfig and arm64 defconfig are building.
It would be interesting to know how this is being triggered here.
Of course the code is here is not very desirable - the root issue is
that we want to allocate writecombine physical memory but there is no
API to do that, so we rely on the DMA API "accidentally" doing the right
thing.
Mikko
[1]: https://patchwork.kernel.org/patch/9688609/
On 19.10.2017 13:11, Jon Hunter wrote:
Adding linux-tegra and Mikko ...
On 19/10/17 09:42, Hermann Lauer wrote:
Hello,
compiling 4.14-rc{4,5} with a debian testing arm config yields the attached
error. Disabling the Nvidia tegra architecture (unneeded on
Banana{Pro,Pi,Ultra}) helps.
Thanks,
greetings
Hermann
CC [M] drivers/gpu/host1x/cdma.o
drivers/gpu/host1x/cdma.c: In function ‘host1x_pushbuffer_init’:
drivers/gpu/host1x/cdma.c:94:48: error: passing argument 3 of ‘dma_alloc_wc’ from incompatible pointer type [-We
rror=incompatible-pointer-types]
pb->mapped = dma_alloc_wc(host1x->dev, size, &pb->phys,
^
In file included from drivers/gpu/host1x/cdma.c:22:0:
./include/linux/dma-mapping.h:780:21: note: expected ‘dma_addr_t * {aka long long unsigned int *}’ but argument
is of type ‘phys_addr_t * {aka unsigned int *}’
static inline void *dma_alloc_wc(struct device *dev, size_t size,
^~~~~~~~~~~~
drivers/gpu/host1x/cdma.c:113:48: error: passing argument 3 of ‘dma_alloc_wc’ from incompatible pointer type [-W
error=incompatible-pointer-types]
pb->mapped = dma_alloc_wc(host1x->dev, size, &pb->phys,
^
In file included from drivers/gpu/host1x/cdma.c:22:0:
./include/linux/dma-mapping.h:780:21: note: expected ‘dma_addr_t * {aka long long unsigned int *}’ but argument
is of type ‘phys_addr_t * {aka unsigned int *}’
static inline void *dma_alloc_wc(struct device *dev, size_t size,
^~~~~~~~~~~~
CC [M] drivers/hid/hid-ntrig.o
cc1: some warnings being treated as errors
Thanks for the report. I don't see this. What config and toolchain are
you using?
Mikko, have you seen this?
Cheers
Jon
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