cpu/hotplug: Convert hotplug locking to percpu rwsem

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There are no more (known) nested calls to get_online_cpus() and all
observed lock ordering problems have been addressed.

Replace the magic nested 'rwsem' hackery with a percpu-rwsem.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sebastian Siewior <bigeasy@linutronix.de>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/20170524081549.447014063@linutronix.de

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This commit is contained in:

Thomas Gleixner 2017-05-24 10:15:40 +02:00

parent 5d5dbc4ef2

commit fc8dffd379

2 changed files with 14 additions and 95 deletions

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include/linux/cpu.h

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