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Prepare a common version of the permission masks that will be based on _PAGE_NA, _PAGE_RO, _PAGE_ROX, _PAGE_RW, _PAGE_RWX that will be defined in platform specific headers in later patches. Put them in a new header pgtable-masks.h which will be included by platforms. And prepare a common version of flags used for mapping kernel memory that will be based on _PAGE_RO, _PAGE_ROX, _PAGE_RW, _PAGE_RWX that will be defined in platform specific headers. Put them in unless _PAGE_KERNEL_RO is already defined so that platform specific definitions can be dismantled one by one. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://msgid.link/d31b59efcdb38e675479563307af891aeadf6ec9.1695659959.git.christophe.leroy@csgroup.eu
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.
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.