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449c545964
When a pMAC exists but the driver is unable to atomically query the aggregate eMAC+pMAC statistics, the user should be given back at least the sum of eMAC and pMAC counters queried separately. This is a generic problem, so add helpers in ethtool to do this operation, if the driver doesn't have a better way to report aggregate stats. Do this in a way that does not require changes to these functions when new stats are added (basically treat the structures as an array of u64 values, except for the first element which is the stats source). In include/linux/ethtool.h, there is already a section where helper function prototypes should be placed. The trouble is, this section is too early, before the definitions of struct ethtool_eth_mac_stats et.al. Move that section at the end and append these new helpers to it. Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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.