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From:   Michal Suchanek <msuchanek@suse.de>
To:     Jens Axboe <axboe@kernel.dk>, Jonathan Corbet <corbet@lwn.net>,
        Borislav Petkov <bp@alien8.de>, Tim Waugh <tim@cyberelk.net>,
        "David S. Miller" <davem@davemloft.net>,
        "James E.J. Bottomley" <jejb@linux.vnet.ibm.com>,
        "Martin K. Petersen" <martin.petersen@oracle.com>,
        Michal Suchanek <msuchanek@suse.de>,
        Kees Cook <keescook@chromium.org>,
        Christophe JAILLET <christophe.jaillet@wanadoo.fr>,
        Thomas Gleixner <tglx@linutronix.de>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Kate Stewart <kstewart@linuxfoundation.org>,
        Philippe Ombredanne <pombredanne@nexb.com>,
        linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-ide@vger.kernel.org, linux-scsi@vger.kernel.org
Subject: [PATCH resend 1/6] delay: add poll_event_interruptible
Date:   Fri, 26 Jan 2018 17:58:35 +0100
Message-Id: <a26ef20e6ff686573a0af16435f20aba186746af.1516985620.git.msuchanek@suse.de>
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Add convenience macro for polling an event that does not have a
waitqueue.

Signed-off-by: Michal Suchanek <msuchanek@suse.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