3847b64570
This commit gets rid of the task_struct structure's ->trc_reader_checked field, making it instead be a bit within the task_struct structure's existing ->trc_reader_special.b.need_qs field. This commit also atomically loads, stores, and checks the resulting combination of the reader-checked and need-quiescent state flags. This will in turn allow significant simplification of the rcu_tasks_trace_postgp() function as well as elimination of the trc_n_readers_need_end counter in later commits. These changes will in turn simplify later elimination of the RCU Tasks Trace scan of the task list, which will make RCU Tasks Trace grace periods less CPU-intensive. [ paulmck: Apply kernel test robot feedback. ] Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Cc: Neeraj Upadhyay <quic_neeraju@quicinc.com> Cc: Eric Dumazet <edumazet@google.com> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Andrii Nakryiko <andrii@kernel.org> Cc: Martin KaFai Lau <kafai@fb.com> Cc: KP Singh <kpsingh@kernel.org>
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.