rcu/nocb: Handle concurrent nocb kthreads creation

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When multiple CPUs in the same nocb gp/cb group concurrently
come online, they might try to concurrently create the same
rcuog kthread. Fix this by using nocb gp CPU's spawn mutex to
provide mutual exclusion for the rcuog kthread creation code.

[ paulmck: Whitespace fixes per kernel test robot feedback. ]

Acked-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Neeraj Upadhyay <quic_neeraju@quicinc.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

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This commit is contained in:

Neeraj Upadhyay 2021-12-11 22:31:39 +05:30 • committed by Paul E. McKenney

parent a47f9f131d

commit 02e3024175

2 changed files with 8 additions and 1 deletions

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2

kernel/rcu/tree.h

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7

kernel/rcu/tree_nocb.h

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