1 files changed, 7 insertions, 0 deletions

diff --git a/util-linux/Config.in b/util-linux/Config.in
index 76e9ff97f..fbcf62476 100644
--- a/util-linux/Config.in
+++ b/util-linux/Config.in
@@ -393,6 +393,13 @@ config CONFIG_UMOUNT
           the tool to use.  If you enabled the 'mount' utility, you almost certainly
           also want to enable 'umount'.
 
+config CONFIG_FEATURE_UMOUNT_ALL
+        bool "  umount -a option"
+        default n
+        depends on CONFIG_UMOUNT
+        help
+          Support -a option to unmount all currently mounted filesystems.
+
 comment "Common options for mount/umount"
         depends on CONFIG_MOUNT || CONFIG_UMOUNT