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The type of the vlan_proto field is __be16. And most users of the field use it as such. In the case of setting or testing the field for the special VLAN_N_VID value, host byte order is used. Which seems incorrect. It also seems somewhat odd to store a VLAN ID value in a field that is otherwise used to store Ether types. Address this issue by defining BOND_VLAN_PROTO_NONE, a big endian value. 0xffff was chosen somewhat arbitrarily. What is important is that it doesn't overlap with any valid VLAN Ether types. I don't believe the problems described above are a bug because VLAN_N_VID in both little-endian and big-endian byte order does not conflict with any supported VLAN Ether types in big-endian byte order. Reported by sparse as: .../bond_main.c:2857:26: warning: restricted __be16 degrades to integer .../bond_main.c:2863:20: warning: restricted __be16 degrades to integer .../bond_main.c:2939:40: warning: incorrect type in assignment (different base types) .../bond_main.c:2939:40: expected restricted __be16 [usertype] vlan_proto .../bond_main.c:2939:40: got int No functional changes intended. Compile tested only. Signed-off-by: Simon Horman <horms@kernel.org> Acked-by: Jay Vosburgh <jay.vosburgh@canonical.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
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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.