mirror of
https://github.com/hardkernel/linux.git
synced 2026-06-03 09:41:54 +09:00
ebc7e21e0f
This patch increases the ARCH_DMA_MINALIGN to 128 so that it covers the currently known Cache Writeback Granule (CTR_EL0.CWG) on arm64 and moves the fallback in cache_line_size() from L1_CACHE_BYTES to this constant. In addition, it warns (and taints) if the CWG is larger than ARCH_DMA_MINALIGN as this is not safe with non-coherent DMA. Cc: Will Deacon <will.deacon@arm.com> Cc: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.