net_sched: sch_sfq: annotate data-races around q->perturb_period

net_sched: sch_sfq: annotate data-races around q->perturb_period

commit a17ef9e6c2c1cf0fc6cd6ca6a9ce525c67d1da7f upstream.

sfq_perturbation() reads q->perturb_period locklessly.
Add annotations to fix potential issues.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20240430180015.3111398-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>