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Using RBP as a temporary register breaks frame pointer convention and breaks stack traces when unwinding from an interrupt in the crypto code. There's no need to use RBP as a temporary register for the TBL value, because it always stores the same value: the address of the K256 table. Instead just reference the address of K256 directly. Reported-by: Eric Biggers <ebiggers@google.com> Reported-by: Peter Zijlstra <peterz@infradead.org> Tested-by: Eric Biggers <ebiggers@google.com> Acked-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.