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1d85594fd3
Compared to all the other work we're already doing to deliver an skb to userspace this is very cheap - at worse an extra call to ktime_get_real() - and very useful. (and indeed it may even be cheaper if we're running from other hooks) (background: Android occasionally logs packets which caused wake from sleep/suspend and we'd like to have timestamps reliably associated with these events) Cc: Pablo Neira Ayuso <pablo@netfilter.org> Cc: Martin KaFai Lau <kafai@fb.com> Cc: Florian Westphal <fw@strlen.de> Signed-off-by: Maciej Żenczykowski <maze@google.com> Signed-off-by: Florian Westphal <fw@strlen.de>
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.