From: "Srivatsa S. Bhat" <[email protected]> Date: Fri, 14 Feb 2014 13:30:58 +0530
> Subsystems that want to register CPU hotplug callbacks, as well as perform > initialization for the CPUs that are already online, often do it as shown > below: ... > This is wrong, since it is prone to ABBA deadlocks involving the > cpu_add_remove_lock and the cpu_hotplug.lock (when running concurrently > with CPU hotplug operations). > > Instead, the correct and race-free way of performing the callback > registration is: ... > Fix the code in net/iucv/iucv.c by using this latter form of callback > registration. Also, provide helper functions to perform the common memory > allocations and frees, to condense repetitive code. > > Cc: Ursula Braun <[email protected]> > Cc: Ingo Molnar <[email protected]> > Cc: [email protected] > Cc: [email protected] > Signed-off-by: David S. Miller <[email protected]> > Signed-off-by: Srivatsa S. Bhat <[email protected]> Acked-by: David S. Miller <[email protected]> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
