From: Linus Walleij <linus.walleij@linaro.org>
To: Thomas Gleixner <tglx@linutronix.de>
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Subject: Re: [patch 16/30] mfd: ab8500-debugfs: Remove the racy fiddling with irq_desc
Date: Fri, 11 Dec 2020 09:22:15 +0100 [thread overview]
Message-ID: <CACRpkdZuPp0KN1BCJ26vWH1=nopaD-ctv6bh-rt2X9bJczZE-Q@mail.gmail.com> (raw)
In-Reply-To: <20201210194044.157283633@linutronix.de>
On Thu, Dec 10, 2020 at 8:42 PM Thomas Gleixner <tglx@linutronix.de> wrote:
> First of all drivers have absolutely no business to dig into the internals
> of an irq descriptor. That's core code and subject to change. All of this
> information is readily available to /proc/interrupts in a safe and race
> free way.
>
> Remove the inspection code which is a blatant violation of subsystem
> boundaries and racy against concurrent modifications of the interrupt
> descriptor.
>
> Print the irq line instead so the information can be looked up in a sane
> way in /proc/interrupts.
>
> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
> Cc: Linus Walleij <linus.walleij@linaro.org>
> Cc: Lee Jones <lee.jones@linaro.org>
> Cc: linux-arm-kernel@lists.infradead.org
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Yours,
Linus Walleij
next prev parent reply other threads:[~2020-12-11 8:26 UTC|newest]
Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-10 19:25 [patch 00/30] genirq: Treewide hunt for irq descriptor abuse and assorted fixes Thomas Gleixner
2020-12-10 19:25 ` [patch 01/30] genirq: Move irq_has_action() into core code Thomas Gleixner
2020-12-10 19:25 ` [patch 02/30] genirq: Move status flag checks to core Thomas Gleixner
2020-12-27 19:20 ` Guenter Roeck
2021-01-11 10:14 ` Thomas Gleixner
2020-12-10 19:25 ` [patch 03/30] genirq: Move irq_set_lockdep_class() " Thomas Gleixner
2020-12-11 17:53 ` Andy Shevchenko
2020-12-11 21:08 ` Thomas Gleixner
2020-12-11 22:07 ` Thomas Gleixner
2020-12-12 13:22 ` Andy Shevchenko
2020-12-10 19:25 ` [patch 04/30] genirq: Provide irq_get_effective_affinity() Thomas Gleixner
2020-12-10 19:25 ` [patch 05/30] genirq: Annotate irq stats data races Thomas Gleixner
2020-12-10 19:25 ` [patch 06/30] parisc/irq: Simplify irq count output for /proc/interrupts Thomas Gleixner
2020-12-10 19:25 ` [patch 07/30] genirq: Make kstat_irqs() static Thomas Gleixner
2020-12-10 19:25 ` [patch 08/30] genirq: Provide kstat_irqdesc_cpu() Thomas Gleixner
2020-12-10 19:25 ` [patch 09/30] ARM: smp: Use irq_desc_kstat_cpu() in show_ipi_list() Thomas Gleixner
2020-12-11 18:08 ` Marc Zyngier
2020-12-10 19:25 ` [patch 10/30] arm64/smp: Use irq_desc_kstat_cpu() in arch_show_interrupts() Thomas Gleixner
2020-12-11 18:08 ` Marc Zyngier
2020-12-10 19:25 ` [patch 11/30] parisc/irq: Use irq_desc_kstat_cpu() in show_interrupts() Thomas Gleixner
2020-12-10 19:25 ` [patch 12/30] s390/irq: Use irq_desc_kstat_cpu() in show_msi_interrupt() Thomas Gleixner
2020-12-10 20:31 ` Heiko Carstens
2020-12-10 19:25 ` [patch 13/30] drm/i915/lpe_audio: Remove pointless irq_to_desc() usage Thomas Gleixner
2020-12-10 19:48 ` [Intel-gfx] " Ville Syrjälä
2020-12-11 9:51 ` Jani Nikula
2020-12-10 19:25 ` [patch 14/30] drm/i915/pmu: Replace open coded kstat_irqs() copy Thomas Gleixner
2020-12-11 9:54 ` Jani Nikula
2020-12-11 10:13 ` Tvrtko Ursulin
2020-12-11 12:57 ` Thomas Gleixner
2020-12-11 14:19 ` David Laight
2020-12-11 21:10 ` Thomas Gleixner
2020-12-11 22:06 ` David Laight
2020-12-10 19:25 ` [patch 15/30] pinctrl: nomadik: Use irq_has_action() Thomas Gleixner
2020-12-12 0:45 ` Linus Walleij
2020-12-10 19:25 ` [patch 16/30] mfd: ab8500-debugfs: Remove the racy fiddling with irq_desc Thomas Gleixner
2020-12-11 8:22 ` Linus Walleij [this message]
2020-12-11 10:04 ` Lee Jones
2020-12-11 18:12 ` Andy Shevchenko
2020-12-10 19:25 ` [patch 17/30] NTB/msi: Use irq_has_action() Thomas Gleixner
2020-12-10 20:33 ` Logan Gunthorpe
2020-12-10 19:25 ` [patch 18/30] PCI: xilinx-nwl: Use irq_data_get_irq_chip_data() Thomas Gleixner
2020-12-10 22:56 ` Rob Herring
2020-12-10 19:25 ` [patch 19/30] PCI: mobiveil: " Thomas Gleixner
2020-12-10 22:56 ` Rob Herring
2020-12-10 19:25 ` [patch 20/30] net/mlx4: Replace irq_to_desc() abuse Thomas Gleixner
2020-12-13 11:24 ` Tariq Toukan
2020-12-10 19:25 ` [patch 21/30] net/mlx4: Use effective interrupt affinity Thomas Gleixner
2020-12-13 11:31 ` Tariq Toukan
2020-12-10 19:25 ` [patch 22/30] net/mlx5: Replace irq_to_desc() abuse Thomas Gleixner
2020-12-13 11:34 ` Tariq Toukan
2020-12-14 21:13 ` Saeed Mahameed
2020-12-10 19:25 ` [patch 23/30] net/mlx5: Use effective interrupt affinity Thomas Gleixner
2020-12-13 11:35 ` Tariq Toukan
2020-12-14 20:58 ` Saeed Mahameed
2020-12-10 19:26 ` [patch 24/30] xen/events: Remove unused bind_evtchn_to_irq_lateeoi() Thomas Gleixner
2020-12-10 23:19 ` boris.ostrovsky
2020-12-11 0:04 ` Thomas Gleixner
2020-12-10 19:26 ` [patch 25/30] xen/events: Remove disfunct affinity spreading Thomas Gleixner
2020-12-10 19:26 ` [patch 26/30] xen/events: Use immediate affinity setting Thomas Gleixner
2020-12-10 19:26 ` [patch 27/30] xen/events: Only force affinity mask for percpu interrupts Thomas Gleixner
2020-12-10 23:20 ` boris.ostrovsky
2020-12-11 0:06 ` Thomas Gleixner
2020-12-11 6:17 ` Jürgen Groß
2020-12-11 10:13 ` Thomas Gleixner
2020-12-11 10:23 ` Jürgen Groß
2020-12-11 12:10 ` Jürgen Groß
2020-12-11 12:37 ` Thomas Gleixner
2020-12-11 14:29 ` boris.ostrovsky
2020-12-11 21:27 ` Thomas Gleixner
2020-12-11 22:21 ` Andrew Cooper
2020-12-11 22:56 ` Thomas Gleixner
2020-12-10 19:26 ` [patch 28/30] xen/events: Reduce irq_info::spurious_cnt storage size Thomas Gleixner
2020-12-10 19:26 ` [patch 29/30] xen/events: Implement irq distribution Thomas Gleixner
2020-12-10 19:26 ` [patch 30/30] genirq: Remove export of irq_to_desc() Thomas Gleixner
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