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04bfa4c7d5119ca38f8133bfdae7957a60c8b221
Allow any ahash to be used with a stack request, with optional
dynamic allocation when async is needed. The intended usage is:
HASH_REQUEST_ON_STACK(req, tfm);
...
err = crypto_ahash_digest(req);
/* The request cannot complete synchronously. */
if (err == -EAGAIN) {
/* This will not fail. */
req = HASH_REQUEST_CLONE(req, gfp);
/* Redo operation. */
err = crypto_ahash_digest(req);
}
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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 reStructuredText 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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