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>
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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