Will Deacon 9b31cf493f arm64: mm: Introduce MAX_USER_VA_BITS definition
With the introduction of 52-bit virtual addressing for userspace, we are
now in a position where the virtual addressing capability of userspace
may exceed that of the kernel. Consequently, the VA_BITS definition
cannot be used blindly, since it reflects only the size of kernel
virtual addresses.

This patch introduces MAX_USER_VA_BITS which is either VA_BITS or 52
depending on whether 52-bit virtual addressing has been configured at
build time, removing a few places where the 52 is open-coded based on
explicit CONFIG_ guards.

Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-12-12 11:51:40 +00:00
2018-10-31 08:54:14 -07:00
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2018-10-31 11:01:38 -07:00
2018-11-15 11:26:09 -06:00
2018-11-18 12:21:09 -08:00
2018-04-15 17:21:30 -07:00
2018-11-18 10:15:09 -08:00
2017-11-17 17:45:29 -08:00
2018-11-18 10:15:09 -08:00
2018-11-18 13:33:44 -08:00

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.
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