From 02ba8fb3357daf57f6120ac512fb464a4c623419 Mon Sep 17 00:00:00 2001
From: Kay Sievers <kay@vrfy.org>
Date: Wed, 4 Jun 2014 16:21:19 +0200
Subject: [PATCH] udev: guard REREADPT by exclusive lock instead of O_EXCL

Signed-off-by: Robert Milasan <rmilasan@suse.com>
---
 src/udev/udevd.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

Index: systemd-210/src/udev/udevd.c
===================================================================
--- systemd-210.orig/src/udev/udevd.c
+++ systemd-210/src/udev/udevd.c
@@ -758,9 +758,12 @@ static int synthesize_change(struct udev
                  * partition table is found, and we will not get an event for
                  * the disk.
                  */
-                fd = open(udev_device_get_devnode(dev), O_RDONLY|O_EXCL|O_CLOEXEC|O_NOFOLLOW|O_NONBLOCK);
+                fd = open(udev_device_get_devnode(dev), O_RDONLY|O_CLOEXEC|O_NOFOLLOW|O_NONBLOCK);
                 if (fd >= 0) {
-                        r = ioctl(fd, BLKRRPART, 0);
+                        r = flock(fd, LOCK_EX|LOCK_NB);
+                        if (r >= 0)
+                                r = ioctl(fd, BLKRRPART, 0);
+
                         close(fd);
                         if (r >= 0)
                                 part_table_read = true;
