rcu: Move rcu_report_exp_rdp() setting of ->cpu_no_qs.b.exp under lock

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This commit reduces the state space of rcu_report_exp_rdp() by moving
the setting of ->cpu_no_qs.b.exp under the rcu_node structure's ->lock.
The lock isn't really all that important here, given that this per-CPU
field is supposed to be written only by its CPU, but the disabling of
interrupts excludes things like rcu_exp_handler(), which also can write
to this same field.  Avoiding this sort of interleaved access reduces
the state space.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Cc: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>

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Paul E. McKenney 2024-10-25 15:56:17 -07:00 • committed by Uladzislau Rezki (Sony)

parent d16e32f75f

commit e2bd168295

1 changed files with 1 additions and 1 deletions

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kernel/rcu/tree_exp.h

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