Messages in this thread | | | Date | Tue, 3 Nov 2015 21:01:08 +0100 (CET) | From | Thomas Gleixner <> | Subject | Re: [v4.1.10-rt10][PATCH 0/2] PCI: dra7xx/dwc: fix "WARNING: CPU: 1 PID: 82 at kernel/irq/handle.c:150 handle_irq_event_percpu" |
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On Tue, 3 Nov 2015, Grygorii Strashko wrote: > On 11/03/2015 03:46 PM, Sebastian Andrzej Siewior wrote: > > On 11/02/2015 08:30 PM, Grygorii Strashko wrote: > >> On -RT above code will generate warnings, because driver_xx_hw_irq_handler() > >> will be forced threaded (by default) and, as result, generic_handle_irq() > >> will be called with IRQs enabled. To W/A this issue generic_handle_irq() can > >> be surrounded by raw_spin_lock_irqsave/irqrestore(wa_lock). > > > > and what happens without -RT if you boot threadedirqs? > > > > Yep. It will still warn :( Can be reworked to cover this case also, i think > (if overall concept will be accepted)
wa_lock - I read that "Warning Annihilation Lock" - does not really qualify as a concept.
Thanks,
tglx
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