linux-kernel - [PATCH 0/5] genirq: Get rid of handle_percpu_devid_fasteoi

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Date:   Mon,  9 Nov 2020 09:41:16 +0000
From:   Valentin Schneider <valentin.schneider@....com>
To:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Marc Zyngier <maz@...nel.org>,
        Lorenzo Pieralisi <Lorenzo.Pieralisi@....com>,
        Jason Cooper <jason@...edaemon.net>,
        Andrew Lunn <andrew@...n.ch>,
        Gregory Clement <gregory.clement@...tlin.com>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>
Subject: [PATCH 0/5] genirq: Get rid of handle_percpu_devid_fasteoi_ipi()

Hi folks,

While hacking on the GIC flow handlers, I grew increasingly suspicious of 
handle_percpu_devid_fasteoi_ipi() and thus did a bit of digging. AFAICT it isn't
actually needed and handle_percpu_devid_irq() would suffice. Argumentation is in
patch 1.

Tested on my Juno (GICv2) and eMAG (GICv3).

Whichever way this goes I owe Marc some pastries, given I either
- Missed something and created some noise
- Turned my brain off back when reviewing this flow handler
so maybe just start with pinging me what you want...

Valentin Schneider (5):
  irqchip/gic, gic-v3: Make SGIs use handle_percpu_devid_irq()
  irqchip/armada-370-xp: Make IPIs use handle_percpu_devid_irq()
  irqchip/bcm2836: Make IPIs use handle_percpu_devid_irq()
  irqchip/hip04: Make IPIs use handle_percpu_devid_irq()
  Revert "genirq: Add fasteoi IPI flow"

 drivers/irqchip/irq-armada-370-xp.c |  2 +-
 drivers/irqchip/irq-bcm2836.c       |  2 +-
 drivers/irqchip/irq-gic-v3.c        |  6 ------
 drivers/irqchip/irq-gic.c           |  8 +-------
 drivers/irqchip/irq-hip04.c         |  6 +-----
 include/linux/irq.h                 |  1 -
 kernel/irq/chip.c                   | 27 ---------------------------
 7 files changed, 4 insertions(+), 48 deletions(-)

--
2.27.0