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SubjectRe: [PATCH v2 6/6] sched: Annotate perf_domain pointer with __rcu
On Sat, Feb 23, 2019 at 01:34:34AM -0500, Joel Fernandes (Google) wrote:
> This fixes the following sparse errors in sched/fair.c:
>
> fair.c:6506:14: error: incompatible types in comparison expression
> fair.c:8642:21: error: incompatible types in comparison expression
>
> Using __rcu will also help sparse catch any future bugs.
>
> Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>

From an RCU perspective:

Reviewed-by: Paul E. McKenney <paulmck@linux.ibm.com>

> ---
> kernel/sched/sched.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
> index ca6a79f57e7a..c8e6514433a9 100644
> --- a/kernel/sched/sched.h
> +++ b/kernel/sched/sched.h
> @@ -780,7 +780,7 @@ struct root_domain {
> * NULL-terminated list of performance domains intersecting with the
> * CPUs of the rd. Protected by RCU.
> */
> - struct perf_domain *pd;
> + struct perf_domain __rcu *pd;
> };
>
> extern struct root_domain def_root_domain;
> --
> 2.21.0.rc0.258.g878e2cd30e-goog
>

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