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commit 3092adcef3ffd2ef59634998297ca8358461ebce upstream. There are currently two separate batched entropy implementations, for u32 and u64, with nearly identical code, with the goal of avoiding unaligned memory accesses and letting the buffers be used more efficiently. Having to maintain these two functions independently is a bit of a hassle though, considering that they always need to be kept in sync. This commit factors them out into a type-generic macro, so that the expansion produces the same code as before, such that diffing the assembly shows no differences. This will also make it easier in the future to add u16 and u8 batches. This was initially tested using an always_inline function and letting gcc constant fold the type size in, but the code gen was less efficient, and in general it was more verbose and harder to follow. So this patch goes with the boring macro solution, similar to what's already done for the _wait functions in random.h. Cc: Dominik Brodowski <linux@dominikbrodowski.net> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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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.