mdev: reinstate "follow symlinks" flag, this time with explanation

1 files changed, 7 insertions, 4 deletions

diff --git a/util-linux/mdev.c b/util-linux/mdev.c
index 9c4938a70..a4c0520ac 100644
--- a/util-linux/mdev.c
+++ b/util-linux/mdev.c
@@ -420,14 +420,17 @@ int mdev_main(int argc, char **argv)
                 root_major = major(st.st_dev);
                 root_minor = minor(st.st_dev);
 
+                /* ACTION_FOLLOWLINKS is needed since in newer kernels
+                 * /sys/block/loop* (for example) are symlinks to dirs,
+                 * not real directories.
+                 * (kernel's CONFIG_SYSFS_DEPRECATED makes them real dirs,
+                 * but we can't enforce that on users) */
                 recursive_action("/sys/block",
-                        ACTION_RECURSE /* no ACTION_FOLLOWLINKS! */,
+                        ACTION_RECURSE | ACTION_FOLLOWLINKS,
                         fileAction, dirAction, temp, 0);
-
                 recursive_action("/sys/class",
-                        ACTION_RECURSE /* no ACTION_FOLLOWLINKS! */,
+                        ACTION_RECURSE | ACTION_FOLLOWLINKS,
                         fileAction, dirAction, temp, 0);
-
         } else {
                 /* Hotplug:
                  * env ACTION=... DEVPATH=... mdev