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When multiple notifications are waiting, ensure they show up in order, as defined by the (predictable) seccomp notification ID. This ensures FIFO ordering of notification delivery as notification ids are monitonic and decided when the notification is generated (as opposed to received). Signed-off-by: Sargun Dhillon <sargun@sargun.me> Cc: linux-kselftest@vger.kernel.org Acked-by: Tycho Andersen <tycho@tycho.pizza> Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20220428015447.13661-2-sargun@sargun.me