From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Date: Thu, 30 May 2024 18:07:19 +0000 (-0700)
Subject: linux/interrupt.h: allow "guard" notation to disable and reenable IRQ
X-Git-Tag: v6.11-rc1~98^2^2~63^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c76494768761aef7630e7e0db820ba7b375964da;p=thirdparty%2Fkernel%2Flinux.git

linux/interrupt.h: allow "guard" notation to disable and reenable IRQ

Drivers often need to first disable an interrupt, carry out some
action, and then reenable the interrupt. Introduce support for the
"guard" notation for this so that the following is possible:

	...

	scoped_cond_guard(mutex_intr, return -EINTR, &data->sysfs_mutex) {
		guard(disable_irq)(&client->irq);

		error = elan_acquire_baseline(data);
		if (error)
			return error;
	}

	...

Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/ZljAV6HjkPSEhWSw@google.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---

diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index 5c9bdd3ffccc8..3a36e64119c8c 100644
--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -5,6 +5,7 @@
 
 #include <linux/kernel.h>
 #include <linux/bitops.h>
+#include <linux/cleanup.h>
 #include <linux/cpumask.h>
 #include <linux/irqreturn.h>
 #include <linux/irqnr.h>
@@ -235,6 +236,9 @@ extern void enable_percpu_irq(unsigned int irq, unsigned int type);
 extern bool irq_percpu_is_enabled(unsigned int irq);
 extern void irq_wake_thread(unsigned int irq, void *dev_id);
 
+DEFINE_LOCK_GUARD_1(disable_irq, int,
+		    disable_irq(*_T->lock), enable_irq(*_T->lock))
+
 extern void disable_nmi_nosync(unsigned int irq);
 extern void disable_percpu_nmi(unsigned int irq);
 extern void enable_nmi(unsigned int irq);