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kernel/irq: Extend lockdep class for request mutex

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The IRQ code already has support for lockdep class for the lock mutex
in an interrupt descriptor. Extend this to add a second class for the
request mutex in the descriptor. Not having a class is resulting in
false positive splats in some code paths.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: linus.walleij@linaro.org
Cc: grygorii.strashko@ti.com
Cc: f.fainelli@gmail.com
Link: https://lkml.kernel.org/r/1512234664-21555-1-git-send-email-andrew@lunn.ch
This commit is contained in:
Andrew Lunn
2017-12-02 18:11:04 +01:00
committed by Thomas Gleixner
parent beacbc68ac
commit 39c3fd5895
11 changed files with 75 additions and 35 deletions
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9
include/linux/irqdesc.h
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@@ -255,12 +255,15 @@ static inline bool irq_is_percpu_devid(unsigned int irq)
}
static inline void
irq_set_lockdep_class(unsigned int irq, struct lock_class_key *class)
irq_set_lockdep_class(unsigned int irq, struct lock_class_key *lock_class,
struct lock_class_key *request_class)
{
struct irq_desc *desc = irq_to_desc(irq);
if (desc)
lockdep_set_class(&desc->lock, class);
if (desc) {
lockdep_set_class(&desc->lock, lock_class);
lockdep_set_class(&desc->request_mutex, request_class);
}
}
#ifdef CONFIG_IRQ_PREFLOW_FASTEOI