linux-kernel - [tip:irq/core] irq: Add new IRQ flag IRQF_NO

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <tip-685fd0b4ea3f0f1d5385610b0d5b57775a8d5842@git.kernel.org>
Date:	Thu, 29 Jul 2010 11:30:47 GMT
From:	tip-bot for Ian Campbell <ian.campbell@...rix.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, grant.likely@...retlab.ca,
	paulus@...ba.org, hpa@...or.com, mingo@...hat.com,
	ian.campbell@...rix.com, jeremy@...p.org,
	dmitry.torokhov@...il.com, benh@...nel.crashing.org,
	tglx@...utronix.de
Subject: [tip:irq/core] irq: Add new IRQ flag IRQF_NO_SUSPEND

Commit-ID:  685fd0b4ea3f0f1d5385610b0d5b57775a8d5842
Gitweb:     http://git.kernel.org/tip/685fd0b4ea3f0f1d5385610b0d5b57775a8d5842
Author:     Ian Campbell <ian.campbell@...rix.com>
AuthorDate: Thu, 29 Jul 2010 11:16:32 +0100
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Thu, 29 Jul 2010 13:24:57 +0200

irq: Add new IRQ flag IRQF_NO_SUSPEND

A small number of users of IRQF_TIMER are using it for the implied no
suspend behaviour on interrupts which are not timer interrupts.

Therefore add a new IRQF_NO_SUSPEND flag, rename IRQF_TIMER to
__IRQF_TIMER and redefine IRQF_TIMER in terms of these new flags.

Signed-off-by: Ian Campbell <ian.campbell@...rix.com>
Cc: Jeremy Fitzhardinge <jeremy@...p.org>
Cc: Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Grant Likely <grant.likely@...retlab.ca>
Cc: xen-devel@...ts.xensource.com
Cc: linux-input@...r.kernel.org
Cc: linuxppc-dev@...abs.org
Cc: devicetree-discuss@...ts.ozlabs.org
LKML-Reference: <1280398595-29708-1-git-send-email-ian.campbell@...rix.com>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
 include/linux/interrupt.h |    7 ++++++-
 kernel/irq/manage.c       |    2 +-
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index c233113..a0384a4 100644
--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -53,16 +53,21 @@
  * IRQF_ONESHOT - Interrupt is not reenabled after the hardirq handler finished.
  *                Used by threaded interrupts which need to keep the
  *                irq line disabled until the threaded handler has been run.
+ * IRQF_NO_SUSPEND - Do not disable this IRQ during suspend
+ *
  */
 #define IRQF_DISABLED		0x00000020
 #define IRQF_SAMPLE_RANDOM	0x00000040
 #define IRQF_SHARED		0x00000080
 #define IRQF_PROBE_SHARED	0x00000100
-#define IRQF_TIMER		0x00000200
+#define __IRQF_TIMER		0x00000200
 #define IRQF_PERCPU		0x00000400
 #define IRQF_NOBALANCING	0x00000800
 #define IRQF_IRQPOLL		0x00001000
 #define IRQF_ONESHOT		0x00002000
+#define IRQF_NO_SUSPEND		0x00004000
+
+#define IRQF_TIMER		(__IRQF_TIMER | IRQF_NO_SUSPEND)
 
 /*
  * Bits used by threaded handlers:
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index e149748..c3003e9 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -216,7 +216,7 @@ static inline int setup_affinity(unsigned int irq, struct irq_desc *desc)
 void __disable_irq(struct irq_desc *desc, unsigned int irq, bool suspend)
 {
 	if (suspend) {
-		if (!desc->action || (desc->action->flags & IRQF_TIMER))
+		if (!desc->action || (desc->action->flags & IRQF_NO_SUSPEND))
 			return;
 		desc->status |= IRQ_SUSPENDED;
 	}
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/