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226f2ca307
To remove dependency on rtnl lock and allow concurrent modification of 'flags' field of tc flow structure, change flow flag type to unsigned long and use atomic bit ops for reading and changing the flags. Implement auxiliary functions for setting, resetting and getting specific flag, and for checking most often used flag values. Always set flags with smp_mb__before_atomic() to ensure that all mlx5e_tc_flow are updated before concurrent readers can read new flags value. Rearrange all code paths to actually set flow->rule[] pointers before setting the OFFLOADED flag. On read side, use smp_mb__after_atomic() when accessing flags to ensure that offload-related flow fields are only read after the flags. Signed-off-by: Vlad Buslov <vladbu@mellanox.com> Reviewed-by: Jianbo Liu <jianbol@mellanox.com> Reviewed-by: Roi Dayan <roid@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
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.