Revert mount/umount uevent removal

This change reverts the 033b96fd30db52a710d97b06f87d16fc59fee0f1 commit
from Kay Sievers that removed the mount/umount uevents from the kernel.
Some older versions of HAL still depend on these events to detect when a
new device has been mounted.  These events are not correctly emitted,
and are broken by design, and so, should not be relied upon by any
future program.  Instead, the /proc/mounts file should be polled to
properly detect this kind of event.

A feature-removal-schedule.txt entry has been added, noting when this
interface will be removed from the kernel.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 4 insertions, 2 deletions

diff --git a/include/linux/kobject.h b/include/linux/kobject.h
index 2a8d8da70961..c374b5fa8d3b 100644
--- a/include/linux/kobject.h
+++ b/include/linux/kobject.h
@@ -41,8 +41,10 @@ enum kobject_action {
         KOBJ_ADD        = (__force kobject_action_t) 0x01,      /* exclusive to core */
         KOBJ_REMOVE     = (__force kobject_action_t) 0x02,      /* exclusive to core */
         KOBJ_CHANGE     = (__force kobject_action_t) 0x03,      /* device state change */
-        KOBJ_OFFLINE    = (__force kobject_action_t) 0x04,      /* device offline */
-        KOBJ_ONLINE     = (__force kobject_action_t) 0x05,      /* device online */
+        KOBJ_MOUNT      = (__force kobject_action_t) 0x04,      /* mount event for block devices (broken) */
+        KOBJ_UMOUNT     = (__force kobject_action_t) 0x05,      /* umount event for block devices (broken) */
+        KOBJ_OFFLINE    = (__force kobject_action_t) 0x06,      /* device offline */
+        KOBJ_ONLINE     = (__force kobject_action_t) 0x07,      /* device online */
 };
 
 struct kobject {