Sebastian Andrzej Siewior ed45af6841 clocksource/i8253: Use raw_spinlock_irqsave() in clockevent_i8253_disable() ...

commit 94cff94634 upstream.

On x86 during boot, clockevent_i8253_disable() can be invoked via
x86_late_time_init -> hpet_time_init() -> pit_timer_init() which happens
with enabled interrupts.

If some of the old i8253 hardware is actually used then lockdep will notice
that i8253_lock is used in hard interrupt context. This causes lockdep to
complain because it observed the lock being acquired with interrupts
enabled and in hard interrupt context.

Make clockevent_i8253_disable() acquire the lock with
raw_spinlock_irqsave() to cure this.

[ tglx: Massage change log and use guard() ]

Fixes: c8c4076723 ("x86/timer: Skip PIT initialization on modern chipsets")
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/all/20250404133116.p-XRWJXf@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2025-05-18 08:24:54 +02:00

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acpi_pm.c

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arc_timer.c

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arm_arch_timer.c

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arm_global_timer.c

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armv7m_systick.c

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asm9260_timer.c

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bcm2835_timer.c

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bcm_kona_timer.c

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clksrc_st_lpc.c

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clksrc-dbx500-prcmu.c

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clps711x-timer.c

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dummy_timer.c

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dw_apb_timer_of.c

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dw_apb_timer.c

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em_sti.c

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exynos_mct.c

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hyperv_timer.c

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i8253.c

clocksource/i8253: Use raw_spinlock_irqsave() in clockevent_i8253_disable()

2025-05-18 08:24:54 +02:00

ingenic-ost.c

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ingenic-sysost.c

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ingenic-timer.c

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jcore-pit.c

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Kconfig

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Makefile

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mips-gic-timer.c

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mmio.c

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mps2-timer.c

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mxs_timer.c

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nomadik-mtu.c

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numachip.c

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renesas-ostm.c

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samsung_pwm_timer.c

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scx200_hrt.c

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sh_cmt.c

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sh_mtu2.c

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sh_tmu.c

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timer-armada-370-xp.c

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timer-atmel-pit.c

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timer-atmel-st.c

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timer-atmel-tcb.c

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timer-cadence-ttc.c

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timer-clint.c

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timer-cs5535.c

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timer-davinci.c

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timer-digicolor.c

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timer-ep93xx.c

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timer-fsl-ftm.c

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timer-fttmr010.c

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timer-goldfish.c

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timer-gx6605s.c

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timer-gxp.c

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timer-imx-gpt.c

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timer-imx-sysctr.c

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timer-imx-tpm.c

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timer-integrator-ap.c

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timer-ixp4xx.c

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timer-keystone.c

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timer-loongson1-pwm.c

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timer-lpc32xx.c

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timer-mediatek-cpux.c

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timer-mediatek.c

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timer-meson6.c

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timer-microchip-pit64b.c

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timer-milbeaut.c

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timer-mp-csky.c

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timer-msc313e.c

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timer-npcm7xx.c

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timer-of.c

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timer-of.h

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timer-orion.c

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timer-owl.c

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timer-pistachio.c

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timer-probe.c

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timer-pxa.c

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timer-qcom.c

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timer-rda.c

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timer-riscv.c

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timer-rockchip.c

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timer-rtl-otto.c

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timer-sp804.c

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timer-sp.h

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timer-sprd.c

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timer-stm32-lp.c

clocksource/drivers/stm32-lptimer: Use wakeup capable instead of init wakeup

2025-04-20 10:15:39 +02:00

timer-stm32.c

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timer-sun4i.c

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timer-sun5i.c

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timer-tegra186.c

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timer-tegra.c

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timer-ti-32k.c

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timer-ti-dm-systimer.c

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timer-ti-dm.c

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timer-versatile.c

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timer-vf-pit.c

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timer-vt8500.c

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timer-zevio.c

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