[PATCH v4 rebase 01/10] cdrom: add poll_event_interruptible
From: Michal Suchanek <hidden>
Date: 2019-11-26 19:55:25
Also in:
linux-fsdevel, linux-scsi, lkml
Subsystem:
the rest, uniform cdrom driver · Maintainers:
Linus Torvalds, Phillip Potter
Add convenience macro for polling an event that does not have a waitqueue. Signed-off-by: Michal Suchanek <redacted> --- drivers/cdrom/cdrom.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+)
diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c
index ac42ae4651ce..2ad6b73482fe 100644
--- a/drivers/cdrom/cdrom.c
+++ b/drivers/cdrom/cdrom.c@@ -282,10 +282,24 @@ #include <linux/fcntl.h> #include <linux/blkdev.h> #include <linux/times.h> +#include <linux/delay.h> #include <linux/uaccess.h> +#include <linux/sched/signal.h> #include <scsi/scsi_common.h> #include <scsi/scsi_request.h> +#define poll_event_interruptible(event, interval) ({ \ + int ret = 0; \ + while (!(event)) { \ + if (signal_pending(current)) { \ + ret = -ERESTARTSYS; \ + break; \ + } \ + msleep_interruptible(interval); \ + } \ + ret; \ +}) + /* used to tell the module to turn on full debugging messages */ static bool debug; /* default compatibility mode */
--
2.23.0