David Miller e9ee9efc0d bpf: Add BPF_F_ANY_ALIGNMENT.
Often we want to write tests cases that check things like bad context
offset accesses.  And one way to do this is to use an odd offset on,
for example, a 32-bit load.

This unfortunately triggers the alignment checks first on platforms
that do not set CONFIG_EFFICIENT_UNALIGNED_ACCESS.  So the test
case see the alignment failure rather than what it was testing for.

It is often not completely possible to respect the original intention
of the test, or even test the same exact thing, while solving the
alignment issue.

Another option could have been to check the alignment after the
context and other validations are performed by the verifier, but
that is a non-trivial change to the verifier.

Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-11-30 21:38:48 -08:00
2018-11-28 08:38:20 -08:00
2018-11-30 21:38:48 -08:00
2018-10-31 08:54:14 -07:00
2018-11-30 21:38:48 -08:00
2018-11-15 11:26:09 -06:00
2018-11-19 12:18:43 +01:00
2018-11-30 21:38:48 -08:00
2018-04-15 17:21:30 -07:00
2017-11-17 17:45:29 -08:00
2018-11-25 14:19:31 -08:00

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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