Messages in this thread | | | From | Marc Zyngier <> | Subject | [PATCH v2 0/2] bus: CCN/CCI: Fix use of smp_processor_id() | Date | Tue, 3 Oct 2017 18:14:11 +0100 |
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I've just noticed that both the CCI and CCN drivers have a small buglet in that they call smp_processor_id() from preemptible context, which is frown upon (having just booted a 4.13 kernel with DEBUG_PREEMPT on my Seattle, I was surprised to be greeted with a nice backtrace...).
I've tested the CCN patch on the same Seatle box, but I've only compile-tested the equivalent CCI patch (which is obviously correct -- famous last words...).
Thanks,
M.
* From v1: Keep the current CPU refcount until we have registered the CPU notifiers, making sure we don't race against a surprise hotplug off.
Marc Zyngier (2): bus: arm-ccn: Fix use of smp_processor_id() in preemptible context bus: arm-cci: Fix use of smp_processor_id() in preemptible context
drivers/bus/arm-cci.c | 7 +++++-- drivers/bus/arm-ccn.c | 4 +++- 2 files changed, 8 insertions(+), 3 deletions(-)
-- 2.11.0
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