From: sboyd@codeaurora.org (Stephen Boyd)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 01/26] genirq: add irq_domain-aware core IRQ handler
Date: Tue, 26 Aug 2014 10:42:44 -0700 [thread overview]
Message-ID: <53FCC714.3090206@codeaurora.org> (raw)
In-Reply-To: <1409047421-27649-2-git-send-email-marc.zyngier@arm.com>
On 08/26/14 03:03, 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 unpleasant warning:
>
> <quote>
> ===============================
> [ INFO: suspicious RCU usage. ]
> 3.16.0-rc1+ #135 Not tainted
> -------------------------------
> include/linux/rcupdate.h:871 rcu_read_lock() used illegally while idle!
>
> other info that might help us debug this:
>
> RCU used illegally from idle CPU!
> rcu_scheduler_active = 1, debug_locks = 0
> RCU used illegally from extended quiescent state!
> 1 lock held by swapper/0/0:
> #0: (rcu_read_lock){......}, at: [<ffffffc00010206c>]
> irq_find_mapping+0x4c/0x198
Do you have the whole stacktrace? I don't see where this is called
outside of irq_enter() from within the idle loop, but maybe I missed
something.
--
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
hosted by The Linux Foundation
next prev parent reply other threads:[~2014-08-26 17:42 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-26 10:03 [PATCH v2 00/26] genirq: fix use of irq_find_mapping outside of legal RCU context Marc Zyngier
2014-08-26 10:03 ` [PATCH v2 01/26] genirq: add irq_domain-aware core IRQ handler Marc Zyngier
2014-08-26 17:42 ` Stephen Boyd [this message]
2014-08-26 18:07 ` Marc Zyngier
2014-08-26 18:46 ` Stephen Boyd
2014-08-26 19:05 ` Stephen Boyd
2014-09-01 15:22 ` Russell King - ARM Linux
2014-08-26 10:03 ` [PATCH v2 02/26] arm64: convert handle_IRQ to use __handle_domain_irq Marc Zyngier
2014-08-26 16:51 ` Catalin Marinas
2014-08-26 16:58 ` Marc Zyngier
2014-08-26 10:03 ` [PATCH v2 03/26] ARM: " Marc Zyngier
2014-08-26 10:03 ` [PATCH v2 04/26] openrisc: " Marc Zyngier
2014-08-26 10:03 ` [PATCH v2 05/26] irqchip: GIC: convert to handle_domain_irq Marc Zyngier
2014-08-26 10:03 ` [PATCH v2 06/26] irqchip: armada-370-xp: " Marc Zyngier
2014-08-26 10:03 ` [PATCH v2 07/26] irqchip: clps711x: " Marc Zyngier
2014-08-26 10:03 ` [PATCH v2 08/26] irqchip: mmp: " Marc Zyngier
2014-08-26 10:03 ` [PATCH v2 09/26] irqchip: mxs: " Marc Zyngier
2014-08-27 6:38 ` Shawn Guo
2014-08-26 10:03 ` [PATCH v2 10/26] irqchip: orion: " Marc Zyngier
2014-08-26 10:03 ` [PATCH v2 11/26] irqchip: s3c24xx: " Marc Zyngier
2014-08-26 10:03 ` [PATCH v2 12/26] irqchip: sirfsoc: " Marc Zyngier
2014-08-26 10:03 ` [PATCH v2 13/26] irqchip: sun4i: " Marc Zyngier
2014-08-26 10:03 ` [PATCH v2 14/26] irqchip: versatile-fpga: " Marc Zyngier
2014-08-26 10:03 ` [PATCH v2 15/26] irqchip: vic: " Marc Zyngier
2014-08-26 10:03 ` [PATCH v2 16/26] irqchip: vt8500: " Marc Zyngier
2014-08-26 10:03 ` [PATCH v2 17/26] irqchip: zevio: " Marc Zyngier
2014-08-26 10:03 ` [PATCH v2 18/26] irqchip: GICv3: " Marc Zyngier
2014-08-26 10:03 ` [PATCH v2 19/26] irqchip: atmel-aic: " Marc Zyngier
2014-09-01 9:32 ` Nicolas Ferre
2014-09-01 10:16 ` Boris BREZILLON
2014-08-26 10:03 ` [PATCH v2 20/26] irqchip: atmel-aic5: " Marc Zyngier
2014-09-01 9:33 ` Nicolas Ferre
2014-09-01 9:51 ` Boris BREZILLON
2014-08-26 10:03 ` [PATCH v2 21/26] irqchip: or1k-pic: " Marc Zyngier
2014-08-27 17:09 ` Stefan Kristiansson
2014-08-26 10:03 ` [PATCH v2 22/26] ARM: imx: avic: " Marc Zyngier
2014-08-27 6:40 ` Shawn Guo
2014-08-26 10:03 ` [PATCH v2 23/26] ARM: imx: tzic: " Marc Zyngier
2014-08-27 6:40 ` Shawn Guo
2014-08-26 10:03 ` [PATCH v2 24/26] ARM: omap2: irq: " Marc Zyngier
2014-08-26 20:57 ` Tony Lindgren
2014-08-26 10:03 ` [PATCH v2 25/26] arm64: get rid of handle_IRQ Marc Zyngier
2014-08-26 16:53 ` Catalin Marinas
2014-08-26 10:03 ` [PATCH v2 26/26] openrisc: " Marc Zyngier
2014-08-26 21:34 ` [PATCH v2 00/26] genirq: fix use of irq_find_mapping outside of legal RCU context Thomas Gleixner
2014-08-27 9:33 ` Marc Zyngier
2014-09-03 12:04 ` Jason Cooper
2014-09-03 12:09 ` Thomas Gleixner
2014-09-03 12:21 ` Marc Zyngier
2014-09-03 12:25 ` Thomas Gleixner
2014-09-03 12:37 ` Jason Cooper
2014-09-03 12:40 ` Marc Zyngier
2014-09-03 12:37 ` Marc Zyngier
2014-09-03 13:18 ` Jason Cooper
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