Re: [PATCH v2 02/15] ARM: pass IRQ domain to the core IRQ handler

From: Jason Cooper
Date: Sun Jul 13 2014 - 18:49:01 EST


On Tue, Jul 08, 2014 at 02:45:40PM +0100, Marc Zyngier wrote:
> Calling irq_find_mapping from outside a irq_{enter,exit} section is
> unsafe and produces ugly messages if CONFIG_PROVE_RCU is enabled:
> If coming from the idle state, the rcu_read_lock call in irq_find_mapping
> will generate an an unpleasant warning.
> A solution is to add a new handle_domain_irq entry point into
> the arm code that the interrupt controller code can call.
> This new function takes an irq_domain, and calls into irq_find_domain
> inside the irq_{enter,exit} block.
> Interrupt controllers can then be updated to use the new mechanism.
> Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx>
> ---
> Sending the right patch this time, with the missing includes that would
> otherwise break the build...
> arch/arm/include/asm/irq.h | 2 ++
> arch/arm/kernel/irq.c | 25 +++++++++++++++++++++----
> 2 files changed, 23 insertions(+), 4 deletions(-)

Please place in Russell's patch tracker,

Acked-by: Jason Cooper <jason@xxxxxxxxxxxxxx>

Once it lands in a release, we'll apply the rest. Please send me a
gentle reminder ;-)


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