d45ae768b7
commit 42ad8cf821f0d8564c393e9ad7d00a1a271d18ae upstream. If no key was provided, then don't waste time initializing the block buffer, as its initial contents won't be used. Also, make crypto_blake2s_init() and blake2s() call a single internal function __blake2s_init() which treats the key as optional, rather than conditionally calling blake2s_init() or blake2s_init_key(). This reduces the compiled code size, as previously both blake2s_init() and blake2s_init_key() were being inlined into these two callers, except when the key size passed to blake2s() was a compile-time constant. These optimizations aren't that significant for BLAKE2s. However, the equivalent optimizations will be more significant for BLAKE2b, as everything is twice as big in BLAKE2b. And it's good to keep things consistent rather than making optimizations for BLAKE2b but not BLAKE2s. Signed-off-by: Eric Biggers <ebiggers@google.com> Acked-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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.