rcu-tasks: Provide rcu_trace_implies_rcu_gp()

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[ Upstream commit e6c86c513f ]

As an accident of implementation, an RCU Tasks Trace grace period also
acts as an RCU grace period.  However, this could change at any time.
This commit therefore creates an rcu_trace_implies_rcu_gp() that currently
returns true to codify this accident.  Code relying on this accident
must call this function to verify that this accident is still happening.

Reported-by: Hou Tao <houtao@huaweicloud.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Martin KaFai Lau <martin.lau@linux.dev>
Link: https://lore.kernel.org/r/20221014113946.965131-2-houtao@huaweicloud.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Stable-dep-of: 8766733641 ("bpf: Defer the free of inner map when necessary")
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

This commit is contained in:

Paul E. McKenney 2022-10-14 19:39:43 +08:00 • committed by Greg Kroah-Hartman

parent db44bac18a

commit 1010882619

2 changed files with 14 additions and 0 deletions

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12

include/linux/rcupdate.h

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2

kernel/rcu/tasks.h

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