irqchip/exynos-combiner: Switch to raw_spinlock

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The exynos-combiner driver uses a regular spinlock to protect access to
the combiner interrupt status register in combiner_handle_cascade_irq(),
which is invoked in hard interrupt context as a chained interrupt handler.

When PREEMPT_RT is enabled on ARM, regular spinlock is converted to a
sleeping lock (mutex-based), which must not be used in atomic context
such as hard interrupt handlers.

Switch the irq_controller_lock to raw_spinlock, which remains a true
non-sleeping spinlock even under PREEMPT_RT.

Fixes: a900e5d997 ("ARM: exynos: move exynos4210-combiner to drivers/irqchip")
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>

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Marek Szyprowski 2026-05-21 00:04:22 +02:00 • committed by Thomas Gleixner

parent 91840be8f7

commit 96031b31a4

1 changed files with 3 additions and 3 deletions

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drivers/irqchip/exynos-combiner.c

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