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9c27301342
The memalloc helper used a house-made code for allocation of WC pages on x86, since the standard DMA API doesn't cover it well. Meanwhile, the manually allocated pages won't work together with IOMMU, resulting in faults, so we should switch to the DMA API in that case, instead. This patch tries to switch back to DMA API for WC pages on x86, but with some additional tweaks that are missing. Link: https://bugzilla.kernel.org/show_bug.cgi?id=219087 Link: https://patch.msgid.link/20240801064808.31205-1-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
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 reStructuredText markup notation.
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.