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All users of block->chain_list rely on rtnl lock and assume that no new chains are added when traversing the list. Use tcf_get_next_chain() to traverse chain list without relying on rtnl mutex. This function iterates over chains by taking reference to current iterator chain only and doesn't assume external synchronization of chain list. Don't take reference to all chains in block when flushing and use tcf_get_next_chain() to safely iterate over chain list instead. Remove tcf_block_put_all_chains() that is no longer used. Signed-off-by: Vlad Buslov <vladbu@mellanox.com> Acked-by: Jiri Pirko <jiri@mellanox.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.