linux-kernel - [PATCH 1/6] delay: add poll_event

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: Windows password security audit tool. GUI, reports in PDF.

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

Date:   Thu, 14 Dec 2017 16:13:50 +0100
From:   Michal Suchanek <msuchanek@...e.de>
To:     Jens Axboe <axboe@...nel.dk>,
        Kate Stewart <kstewart@...uxfoundation.org>,
        John Stultz <john.stultz@...aro.org>,
        Philippe Ombredanne <pombredanne@...b.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Russell King <rmk+kernel@...linux.org.uk>,
        Michal Suchanek <msuchanek@...e.de>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 1/6] delay: add poll_event_interruptible

Add convenience macro for polling an event that does not have a
waitqueue.

Signed-off-by: Michal Suchanek <msuchanek@...e.de>
---
 include/linux/delay.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/include/linux/delay.h b/include/linux/delay.h
index b78bab4395d8..3ae9fa395628 100644
--- a/include/linux/delay.h
+++ b/include/linux/delay.h
@@ -64,4 +64,16 @@ static inline void ssleep(unsigned int seconds)
 	msleep(seconds * 1000);
 }
 
+#define poll_event_interruptible(event, interval) ({ \
+	int ret = 0; \
+	while (!(event)) { \
+		if (signal_pending(current)) { \
+			ret = -ERESTARTSYS; \
+			break; \
+		} \
+		msleep_interruptible(interval); \
+	} \
+	ret; \
+})
+
 #endif /* defined(_LINUX_DELAY_H) */
-- 
2.13.6