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Eric Dumazet says: ==================== net: remove some skb_mac_header assumptions Historically, we tried o maintain skb_mac_header available in most of networking paths. When reaching ndo_start_xmit() handlers, skb_mac_header() should always be skb->data. With recent additions of skb_mac_header_was_set() and DEBUG_NET_WARN_ON_ONCE() in skb_mac_header(), we can attempt to remove our reliance on skb_mac_header in TX paths. When this effort completes we will remove skb_reset_mac_header() from __dev_queue_xmit() and replace it by skb_unset_mac_header() on DEBUG_NET builds. ==================== Link: https://lore.kernel.org/r/20230321164519.1286357-1-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.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.