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The next patch adds per-nexthop spinlock which protects nh->f6i_list. When rt->nh is not NULL, fib6_add_rt2node() will be called under the lock. fib6_add_rt2node() could call fib6_purge_rt() for another route, which could holds another nexthop lock. Then, deadlock could happen between two nexthops. Let's defer fib6_purge_rt() after fib6_add_rt2node(). Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com> Acked-by: Paolo Abeni <pabeni@redhat.com> Link: https://patch.msgid.link/20250418000443.43734-14-kuniyu@amazon.com Signed-off-by: Paolo Abeni <pabeni@redhat.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 reStructuredText 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.