From: "Srivatsa S. Bhat" <srivatsa.b...@linux.vnet.ibm.com> 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 <ursula.br...@de.ibm.com> > Cc: Ingo Molnar <mi...@kernel.org> > Cc: linux-s...@vger.kernel.org > Cc: net...@vger.kernel.org > Signed-off-by: David S. Miller <da...@davemloft.net> > Signed-off-by: Srivatsa S. Bhat <srivatsa.b...@linux.vnet.ibm.com> Acked-by: David S. Miller <da...@davemloft.net> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
