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1f38221511
cpuset_cpus_allowed() uses a reader lock that is sleepable under RT, which means it cannot be called inside raw_spin_lock_t context. Introduce a new cpuset_cpus_allowed_locked() helper that performs the same function as cpuset_cpus_allowed() except that the caller must have acquired the cpuset_mutex so that no further locking will be needed. Suggested-by: Waiman Long <longman@redhat.com> Signed-off-by: Pingfan Liu <piliu@redhat.com> Cc: Waiman Long <longman@redhat.com> Cc: Tejun Heo <tj@kernel.org> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Koutný <mkoutny@suse.com> Cc: linux-kernel@vger.kernel.org To: cgroups@vger.kernel.org Reviewed-by: Chen Ridong <chenridong@huawei.com> Reviewed-by: Waiman Long <longman@redhat.com> Signed-off-by: Tejun Heo <tj@kernel.org> |
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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 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.