[PULL 0/4] ARM support for generic memremap()

[Ard Biesheuvel]

On 29 March 2016 at 09:18, Ard Biesheuvel <ard.biesheuvel at linaro.org> wrote:
> Hello Russell,
>
> This is a straight rebase of version 3 of this patch series, which I posted
> here: http://thread.gmane.org/gmane.linux.ports.arm.kernel/484005. I have
> attached the individual patches to this cover letter for reference.
>
> Please pull for v4.7. I expect some of my UEFI work regarding memory
> protection tables and the EFI framebuffer to land in the 4.7 timeframe as well,
> and thise rely on memremap() to do the right thing if firmware tables happen
> to reside in memory that is also covered by memblock/the linear mapping.
>

Please don't pull this yet. Patch #3 inadvertently changes the
fallback behavior for memory that is not covered by the kernel direct
mapping and is not covered by a 'System RAM' iomem entry.

I will follow up with a v4

Thanks,
Ard.


> -------------8<-----------------
> The following changes since commit f55532a0c0b8bb6148f4e07853b876ef73bc69ca:
>
>   Linux 4.6-rc1 (2016-03-26 16:03:24 -0700)
>
> are available in the git repository at:
>
>   git://git.linaro.org/people/ard.biesheuvel/linux-arm.git \
>                                                   tags/arm-memremap-for-v4.7
>
> for you to fetch changes up to fc77542bdffe9dcb3890c631ad571e1e4b0cc8c3:
>
>   ARM: memremap: implement arch_memremap_wb() (2016-03-29 08:19:26 +0200)
>
> ----------------------------------------------------------------
> This series wires up the generic memremap() function in a way that allows it
> to be used as intended, i.e., without regard for whether the region being
> mapped is covered by a struct page and/or the linear mapping (lowmem)
>
> ----------------------------------------------------------------
>
> Ard Biesheuvel (4):
>   ARM: reintroduce ioremap_cached() for creating cached I/O mappings
>   mtd: pxa2xx-flash: switch back from memremap to ioremap_cached
>   memremap: add arch specific hook for MEMREMAP_WB mappings
>   ARM: memremap: implement arch_memremap_wb()
>
>  arch/arm/include/asm/io.h       | 12 ++++++++++++
>  arch/arm/mm/ioremap.c           | 16 ++++++++++++++--
>  drivers/mtd/maps/pxa2xx-flash.c |  6 +++---
>  kernel/memremap.c               | 11 ++++++++---
>  4 files changed, 37 insertions(+), 8 deletions(-)
>
> --
> 2.5.0
>