volume_id: Adopt to new config style.

Config instructions for util-linux/volume_id are moved into the
source files according to the new config feature.

No code change.

Signed-off-by: Sven-Göran Bergh <sgb@systemasis.org>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

34 files changed, 317 insertions, 0 deletions

diff --git a/util-linux/volume_id/Config.src b/util-linux/volume_id/Config.src
new file mode 100644
index 000000000..ac208c9cc
--- /dev/null
+++ b/util-linux/volume_id/Config.src
@@ -0,0 +1,15 @@
+#
+# For a description of the syntax of this configuration file,
+# see scripts/kbuild/config-language.txt.
+#
+
+config VOLUMEID
+        bool #No description makes it a hidden option
+        default n
+
+menu "Filesystem/Volume identification"
+        depends on VOLUMEID
+
+INSERT
+
+endmenu
diff --git a/util-linux/volume_id/btrfs.c b/util-linux/volume_id/btrfs.c
index 46725da3d..e4dddf26d 100644
--- a/util-linux/volume_id/btrfs.c
+++ b/util-linux/volume_id/btrfs.c
@@ -21,6 +21,15 @@
 
 //kbuild:lib-$(CONFIG_FEATURE_VOLUMEID_BTRFS) += btrfs.o
 
+//config:
+//config:config FEATURE_VOLUMEID_BTRFS
+//config:       bool "btrfs filesystem"
+//config:       default y
+//config:       depends on VOLUMEID
+//config:       help
+//config:         TODO
+//config:
+
 #include "volume_id_internal.h"
 
 #define BTRFS_UUID_SIZE 16
diff --git a/util-linux/volume_id/cramfs.c b/util-linux/volume_id/cramfs.c
index 8dfd611f4..aeb7f20ac 100644
--- a/util-linux/volume_id/cramfs.c
+++ b/util-linux/volume_id/cramfs.c
@@ -20,6 +20,15 @@
 
 //kbuild:lib-$(CONFIG_FEATURE_VOLUMEID_CRAMFS) += cramfs.o
 
+//config:
+//config:config FEATURE_VOLUMEID_CRAMFS
+//config:       bool "cramfs filesystem"
+//config:       default y
+//config:       depends on VOLUMEID
+//config:       help
+//config:         TODO
+//config:
+
 #include "volume_id_internal.h"
 
 struct cramfs_super {
diff --git a/util-linux/volume_id/exfat.c b/util-linux/volume_id/exfat.c
index 01b350003..c3aa36804 100644
--- a/util-linux/volume_id/exfat.c
+++ b/util-linux/volume_id/exfat.c
@@ -20,6 +20,17 @@
 
 //kbuild:lib-$(CONFIG_FEATURE_VOLUMEID_EXFAT) += exfat.o
 
+//config:
+//config:config FEATURE_VOLUMEID_EXFAT
+//config:       bool "exFAT filesystem"
+//config:       default y
+//config:       depends on VOLUMEID
+//config:       help
+//config:         exFAT (extended FAT) is a proprietary file system designed especially
+//config:         for flash drives. It has many features from NTFS, but with less
+//config:         overhead. exFAT is used on most SDXC cards for consumer electronics.
+//config:
+
 #include "volume_id_internal.h"
 
 #define EXFAT_SB_OFFSET         0
diff --git a/util-linux/volume_id/ext.c b/util-linux/volume_id/ext.c
index a1a080805..df39d9342 100644
--- a/util-linux/volume_id/ext.c
+++ b/util-linux/volume_id/ext.c
@@ -20,6 +20,15 @@
 
 //kbuild:lib-$(CONFIG_FEATURE_VOLUMEID_EXT) += ext.o
 
+//config:
+//config:config FEATURE_VOLUMEID_EXT
+//config:       bool "Ext filesystem"
+//config:       default y
+//config:       depends on VOLUMEID
+//config:       help
+//config:         TODO
+//config:
+
 #include "volume_id_internal.h"
 #include "bb_e2fs_defs.h"
 
diff --git a/util-linux/volume_id/fat.c b/util-linux/volume_id/fat.c
index 96b2b695d..476d500a6 100644
--- a/util-linux/volume_id/fat.c
+++ b/util-linux/volume_id/fat.c
@@ -20,6 +20,15 @@
 
 //kbuild:lib-$(CONFIG_FEATURE_VOLUMEID_FAT) += fat.o
 
+//config:
+//config:config FEATURE_VOLUMEID_FAT
+//config:       bool "fat filesystem"
+//config:       default y
+//config:       depends on VOLUMEID
+//config:       help
+//config:         TODO
+//config:
+
 #include "volume_id_internal.h"
 
 /* linux/msdos_fs.h says: */
diff --git a/util-linux/volume_id/hfs.c b/util-linux/volume_id/hfs.c
index 496d3502a..8d34aaf68 100644
--- a/util-linux/volume_id/hfs.c
+++ b/util-linux/volume_id/hfs.c
@@ -20,6 +20,15 @@
 
 //kbuild:lib-$(CONFIG_FEATURE_VOLUMEID_HFS) += hfs.o
 
+//config:
+//config:config FEATURE_VOLUMEID_HFS
+//config:       bool "hfs filesystem"
+//config:       default y
+//config:       depends on VOLUMEID
+//config:       help
+//config:         TODO
+//config:
+
 #include "volume_id_internal.h"
 
 struct hfs_finder_info{
diff --git a/util-linux/volume_id/iso9660.c b/util-linux/volume_id/iso9660.c
index 67ba8fdd5..3848de453 100644
--- a/util-linux/volume_id/iso9660.c
+++ b/util-linux/volume_id/iso9660.c
@@ -20,6 +20,15 @@
 
 //kbuild:lib-$(CONFIG_FEATURE_VOLUMEID_ISO9660) += iso9660.o
 
+//config:
+//config:config FEATURE_VOLUMEID_ISO9660
+//config:       bool "iso9660 filesystem"
+//config:       default y
+//config:       depends on VOLUMEID
+//config:       help
+//config:         TODO
+//config:
+
 #include "volume_id_internal.h"
 
 #define ISO_SUPERBLOCK_OFFSET           0x8000
diff --git a/util-linux/volume_id/jfs.c b/util-linux/volume_id/jfs.c
index 590698d68..a6eaff45b 100644
--- a/util-linux/volume_id/jfs.c
+++ b/util-linux/volume_id/jfs.c
@@ -20,6 +20,15 @@
 
 //kbuild:lib-$(CONFIG_FEATURE_VOLUMEID_JFS) += jfs.o
 
+//config:
+//config:config FEATURE_VOLUMEID_JFS
+//config:       bool "jfs filesystem"
+//config:       default y
+//config:       depends on VOLUMEID
+//config:       help
+//config:         TODO
+//config:
+
 #include "volume_id_internal.h"
 
 struct jfs_super_block {
diff --git a/util-linux/volume_id/linux_raid.c b/util-linux/volume_id/linux_raid.c
index 74fd10b88..f20823a6e 100644
--- a/util-linux/volume_id/linux_raid.c
+++ b/util-linux/volume_id/linux_raid.c
@@ -20,6 +20,15 @@
 
 //kbuild:lib-$(CONFIG_FEATURE_VOLUMEID_LINUXRAID) += linux_raid.o
 
+//config:
+//config:config FEATURE_VOLUMEID_LINUXRAID
+//config:       bool "linuxraid"
+//config:       default y
+//config:       depends on VOLUMEID
+//config:       help
+//config:         TODO
+//config:
+
 #include "volume_id_internal.h"
 
 struct mdp_super_block {
diff --git a/util-linux/volume_id/linux_swap.c b/util-linux/volume_id/linux_swap.c
index ffb448e95..39470d48c 100644
--- a/util-linux/volume_id/linux_swap.c
+++ b/util-linux/volume_id/linux_swap.c
@@ -20,6 +20,15 @@
 
 //kbuild:lib-$(CONFIG_FEATURE_VOLUMEID_LINUXSWAP) += linux_swap.o
 
+//config:
+//config:config FEATURE_VOLUMEID_LINUXSWAP
+//config:       bool "linux swap filesystem"
+//config:       default y
+//config:       depends on VOLUMEID
+//config:       help
+//config:         TODO
+//config:
+
 #include "volume_id_internal.h"
 
 struct swap_header_v1_2 {
diff --git a/util-linux/volume_id/luks.c b/util-linux/volume_id/luks.c
index 856d42fa6..42bf87659 100644
--- a/util-linux/volume_id/luks.c
+++ b/util-linux/volume_id/luks.c
@@ -20,6 +20,15 @@
 
 //kbuild:lib-$(CONFIG_FEATURE_VOLUMEID_LUKS) += luks.o
 
+//config:
+//config:config FEATURE_VOLUMEID_LUKS
+//config:       bool "luks filesystem"
+//config:       default y
+//config:       depends on VOLUMEID
+//config:       help
+//config:         TODO
+//config:
+
 #include "volume_id_internal.h"
 
 #define LUKS_MAGIC_L             6
diff --git a/util-linux/volume_id/nilfs.c b/util-linux/volume_id/nilfs.c
index daa0294ae..934856ff6 100644
--- a/util-linux/volume_id/nilfs.c
+++ b/util-linux/volume_id/nilfs.c
@@ -21,6 +21,15 @@
 
 //kbuild:lib-$(CONFIG_FEATURE_VOLUMEID_NILFS) += nilfs.o
 
+//config:
+//config:config FEATURE_VOLUMEID_NILFS
+//config:       bool "nilfs filesystem"
+//config:       default y
+//config:       depends on VOLUMEID
+//config:       help
+//config:         TODO
+//config:
+
 #include "volume_id_internal.h"
 
 #define NILFS_UUID_SIZE 16
diff --git a/util-linux/volume_id/ntfs.c b/util-linux/volume_id/ntfs.c
index b8f278bff..46f687a56 100644
--- a/util-linux/volume_id/ntfs.c
+++ b/util-linux/volume_id/ntfs.c
@@ -20,6 +20,15 @@
 
 //kbuild:lib-$(CONFIG_FEATURE_VOLUMEID_NTFS) += ntfs.o
 
+//config:
+//config:config FEATURE_VOLUMEID_NTFS
+//config:       bool "ntfs filesystem"
+//config:       default y
+//config:       depends on VOLUMEID
+//config:       help
+//config:         TODO
+//config:
+
 #include "volume_id_internal.h"
 
 struct ntfs_super_block {
diff --git a/util-linux/volume_id/ocfs2.c b/util-linux/volume_id/ocfs2.c
index 850f60a4a..415e0bf61 100644
--- a/util-linux/volume_id/ocfs2.c
+++ b/util-linux/volume_id/ocfs2.c
@@ -20,6 +20,15 @@
 
 //kbuild:lib-$(CONFIG_FEATURE_VOLUMEID_OCFS2) += ocfs2.o
 
+//config:
+//config:config FEATURE_VOLUMEID_OCFS2
+//config:       bool "ocfs2 filesystem"
+//config:       default y
+//config:       depends on VOLUMEID
+//config:       help
+//config:         TODO
+//config:
+
 #include "volume_id_internal.h"
 
 /* All these values are taken from ocfs2-tools's ocfs2_fs.h */
diff --git a/util-linux/volume_id/reiserfs.c b/util-linux/volume_id/reiserfs.c
index 5dcc037ba..24979fb1c 100644
--- a/util-linux/volume_id/reiserfs.c
+++ b/util-linux/volume_id/reiserfs.c
@@ -21,6 +21,15 @@
 
 //kbuild:lib-$(CONFIG_FEATURE_VOLUMEID_REISERFS) += reiserfs.o
 
+//config:
+//config:config FEATURE_VOLUMEID_REISERFS
+//config:       bool "Reiser filesystem"
+//config:       default y
+//config:       depends on VOLUMEID
+//config:       help
+//config:         TODO
+//config:
+
 #include "volume_id_internal.h"
 
 struct reiserfs_super_block {
diff --git a/util-linux/volume_id/romfs.c b/util-linux/volume_id/romfs.c
index b55ec9b46..4754fdb37 100644
--- a/util-linux/volume_id/romfs.c
+++ b/util-linux/volume_id/romfs.c
@@ -20,6 +20,15 @@
 
 //kbuild:lib-$(CONFIG_FEATURE_VOLUMEID_ROMFS) += romfs.o
 
+//config:
+//config:config FEATURE_VOLUMEID_ROMFS
+//config:       bool "romfs filesystem"
+//config:       default y
+//config:       depends on VOLUMEID
+//config:       help
+//config:         TODO
+//config:
+
 #include "volume_id_internal.h"
 
 struct romfs_super {
diff --git a/util-linux/volume_id/squashfs.c b/util-linux/volume_id/squashfs.c
index c5b4f9ced..079b6cc31 100644
--- a/util-linux/volume_id/squashfs.c
+++ b/util-linux/volume_id/squashfs.c
@@ -8,6 +8,18 @@
 
 //kbuild:lib-$(CONFIG_FEATURE_VOLUMEID_SQUASHFS) += squashfs.o
 
+//config:
+//config:config FEATURE_VOLUMEID_SQUASHFS
+//config:       bool "SquashFS filesystem"
+//config:       default y
+//config:       depends on VOLUMEID && FEATURE_BLKID_TYPE
+//config:       help
+//config:         Squashfs is a compressed read-only filesystem for Linux. Squashfs is
+//config:         intended for general read-only filesystem use and in constrained block
+//config:         device/memory systems (e.g. embedded systems) where low overhead is
+//config:         needed.
+//config:
+
 #include "volume_id_internal.h"
 
 struct squashfs_superblock {
diff --git a/util-linux/volume_id/sysv.c b/util-linux/volume_id/sysv.c
index 7cc1d2133..7b4b5360b 100644
--- a/util-linux/volume_id/sysv.c
+++ b/util-linux/volume_id/sysv.c
@@ -20,6 +20,15 @@
 
 //kbuild:lib-$(CONFIG_FEATURE_VOLUMEID_SYSV) += sysv.o
 
+//config:
+//config:config FEATURE_VOLUMEID_SYSV
+//config:       bool "sysv filesystem"
+//config:       default y
+//config:       depends on VOLUMEID
+//config:       help
+//config:         TODO
+//config:
+
 #include "volume_id_internal.h"
 
 #define SYSV_NICINOD                    100
diff --git a/util-linux/volume_id/udf.c b/util-linux/volume_id/udf.c
index ee5bb773d..921454503 100644
--- a/util-linux/volume_id/udf.c
+++ b/util-linux/volume_id/udf.c
@@ -20,6 +20,15 @@
 
 //kbuild:lib-$(CONFIG_FEATURE_VOLUMEID_UDF) += udf.o
 
+//config:
+//config:config FEATURE_VOLUMEID_UDF
+//config:       bool "udf filesystem"
+//config:       default y
+//config:       depends on VOLUMEID
+//config:       help
+//config:         TODO
+//config:
+
 #include "volume_id_internal.h"
 
 struct volume_descriptor {
diff --git a/util-linux/volume_id/unused_highpoint.c b/util-linux/volume_id/unused_highpoint.c
index 990875c8b..7231a1db2 100644
--- a/util-linux/volume_id/unused_highpoint.c
+++ b/util-linux/volume_id/unused_highpoint.c
@@ -20,6 +20,15 @@
 
 //kbuild:### lib-$(CONFIG_FEATURE_VOLUMEID_HIGHPOINTRAID) += highpoint.o
 
+//config:
+//config:### config FEATURE_VOLUMEID_HIGHPOINTRAID
+//config:###    bool "highpoint raid"
+//config:###    default y
+//config:###    depends on VOLUMEID
+//config:###    help
+//config:###      TODO
+//config:
+
 #include "volume_id_internal.h"
 
 struct hpt37x_meta {
diff --git a/util-linux/volume_id/unused_hpfs.c b/util-linux/volume_id/unused_hpfs.c
index 2a7477bdb..a87c89fb3 100644
--- a/util-linux/volume_id/unused_hpfs.c
+++ b/util-linux/volume_id/unused_hpfs.c
@@ -20,6 +20,15 @@
 
 //kbuild:### lib-$(CONFIG_FEATURE_VOLUMEID_HPFS) += hpfs.o
 
+//config:
+//config:### config FEATURE_VOLUMEID_HPFS
+//config:###    bool "hpfs filesystem"
+//config:###    default y
+//config:###    depends on VOLUMEID
+//config:###    help
+//config:###      TODO
+//config:
+
 #include "volume_id_internal.h"
 
 struct hpfs_super {
diff --git a/util-linux/volume_id/unused_isw_raid.c b/util-linux/volume_id/unused_isw_raid.c
index 35bc7d13c..851bd2f8f 100644
--- a/util-linux/volume_id/unused_isw_raid.c
+++ b/util-linux/volume_id/unused_isw_raid.c
@@ -20,6 +20,15 @@
 
 //kbuild:### lib-$(CONFIG_FEATURE_VOLUMEID_ISWRAID) += isw_raid.o
 
+//config:
+//config:### config FEATURE_VOLUMEID_ISWRAID
+//config:###    bool "intel raid"
+//config:###    default y
+//config:###    depends on VOLUMEID
+//config:###    help
+//config:###      TODO
+//config:
+
 #include "volume_id_internal.h"
 
 struct isw_meta {
diff --git a/util-linux/volume_id/unused_lsi_raid.c b/util-linux/volume_id/unused_lsi_raid.c
index 6578f9812..52d68deab 100644
--- a/util-linux/volume_id/unused_lsi_raid.c
+++ b/util-linux/volume_id/unused_lsi_raid.c
@@ -20,6 +20,15 @@
 
 //kbuild:### lib-$(CONFIG_FEATURE_VOLUMEID_LSIRAID) += lsi_raid.o
 
+//config:
+//config:### config FEATURE_VOLUMEID_LSIRAID
+//config:###    bool "lsi raid"
+//config:###    default y
+//config:###    depends on VOLUMEID
+//config:###    help
+//config:###      TODO
+//config:
+
 #include "volume_id_internal.h"
 
 struct lsi_meta {
diff --git a/util-linux/volume_id/unused_lvm.c b/util-linux/volume_id/unused_lvm.c
index cb038f4ee..08fa05243 100644
--- a/util-linux/volume_id/unused_lvm.c
+++ b/util-linux/volume_id/unused_lvm.c
@@ -20,6 +20,15 @@
 
 //kbuild:### lib-$(CONFIG_FEATURE_VOLUMEID_LVM) += lvm.o
 
+//config:
+//config:### config FEATURE_VOLUMEID_LVM
+//config:###    bool "lvm"
+//config:###    default y
+//config:###    depends on VOLUMEID
+//config:###    help
+//config:###      TODO
+//config:
+
 #include "volume_id_internal.h"
 
 struct lvm1_super_block {
diff --git a/util-linux/volume_id/unused_mac.c b/util-linux/volume_id/unused_mac.c
index 5c4053223..a1a53d1fb 100644
--- a/util-linux/volume_id/unused_mac.c
+++ b/util-linux/volume_id/unused_mac.c
@@ -20,6 +20,15 @@
 
 //kbuild:### lib-$(CONFIG_FEATURE_VOLUMEID_MAC) += mac.o
 
+//config:
+//config:### config FEATURE_VOLUMEID_MAC
+//config:###    bool "mac filesystem"
+//config:###    default y
+//config:###    depends on VOLUMEID
+//config:###    help
+//config:###      TODO
+//config:
+
 #include "volume_id_internal.h"
 
 struct mac_driver_desc {
diff --git a/util-linux/volume_id/unused_minix.c b/util-linux/volume_id/unused_minix.c
index 7dc4175d3..50afd5c3e 100644
--- a/util-linux/volume_id/unused_minix.c
+++ b/util-linux/volume_id/unused_minix.c
@@ -20,6 +20,15 @@
 
 //kbuild:### lib-$(CONFIG_FEATURE_VOLUMEID_MINIX) += minix.o
 
+//config:
+//config:### config FEATURE_VOLUMEID_MINIX
+//config:###    bool "minix filesystem"
+//config:###    default y
+//config:###    depends on VOLUMEID
+//config:###    help
+//config:###      TODO
+//config:
+
 #include "volume_id_internal.h"
 
 struct minix_super_block {
diff --git a/util-linux/volume_id/unused_msdos.c b/util-linux/volume_id/unused_msdos.c
index 3d90827d8..d2fc66caa 100644
--- a/util-linux/volume_id/unused_msdos.c
+++ b/util-linux/volume_id/unused_msdos.c
@@ -20,6 +20,15 @@
 
 //kbuild:### lib-$(CONFIG_FEATURE_VOLUMEID_MSDOS) += msdos.o
 
+//config:
+//config:### config FEATURE_VOLUMEID_MSDOS
+//config:###    bool "msdos filesystem"
+//config:###    default y
+//config:###    depends on VOLUMEID
+//config:###    help
+//config:###      TODO
+//config:
+
 #include "volume_id_internal.h"
 
 struct msdos_partition_entry {
diff --git a/util-linux/volume_id/unused_nvidia_raid.c b/util-linux/volume_id/unused_nvidia_raid.c
index 951857555..d99a108f3 100644
--- a/util-linux/volume_id/unused_nvidia_raid.c
+++ b/util-linux/volume_id/unused_nvidia_raid.c
@@ -20,6 +20,15 @@
 
 //kbuild:### lib-$(CONFIG_FEATURE_VOLUMEID_NVIDIARAID) += nvidia_raid.o
 
+//config:
+//config:### config FEATURE_VOLUMEID_NVIDIARAID
+//config:###    bool "nvidia raid"
+//config:###    default y
+//config:###    depends on VOLUMEID
+//config:###    help
+//config:###      TODO
+//config:
+
 #include "volume_id_internal.h"
 
 struct nvidia_meta {
diff --git a/util-linux/volume_id/unused_promise_raid.c b/util-linux/volume_id/unused_promise_raid.c
index d19a2f7ba..cebebe35f 100644
--- a/util-linux/volume_id/unused_promise_raid.c
+++ b/util-linux/volume_id/unused_promise_raid.c
@@ -20,6 +20,15 @@
 
 //kbuild:### lib-$(CONFIG_FEATURE_VOLUMEID_PROMISERAID) += promise_raid.o
 
+//config:
+//config:### config FEATURE_VOLUMEID_PROMISERAID
+//config:###    bool "promise raid"
+//config:###    default y
+//config:###    depends on VOLUMEID
+//config:###    help
+//config:###      TODO
+//config:
+
 #include "volume_id_internal.h"
 
 struct promise_meta {
diff --git a/util-linux/volume_id/unused_silicon_raid.c b/util-linux/volume_id/unused_silicon_raid.c
index 65dc63b1d..40c8faa9e 100644
--- a/util-linux/volume_id/unused_silicon_raid.c
+++ b/util-linux/volume_id/unused_silicon_raid.c
@@ -20,6 +20,15 @@
 
 //kbuild:### lib-$(CONFIG_FEATURE_VOLUMEID_SILICONRAID) += silicon_raid.o
 
+//config:
+//config:### config FEATURE_VOLUMEID_SILICONRAID
+//config:###    bool "silicon raid"
+//config:###    default y
+//config:###    depends on VOLUMEID
+//config:###    help
+//config:###      TODO
+//config:
+
 #include "volume_id_internal.h"
 
 struct silicon_meta {
diff --git a/util-linux/volume_id/unused_ufs.c b/util-linux/volume_id/unused_ufs.c
index 173acce2f..d33c10fc4 100644
--- a/util-linux/volume_id/unused_ufs.c
+++ b/util-linux/volume_id/unused_ufs.c
@@ -20,6 +20,15 @@
 
 //kbuild:### lib-$(CONFIG_FEATURE_VOLUMEID_UFS) += ufs.o
 
+//config:
+//config:### config FEATURE_VOLUMEID_UFS
+//config:###    bool "ufs filesystem"
+//config:###    default y
+//config:###    depends on VOLUMEID
+//config:###    help
+//config:###      TODO
+//config:
+
 #include "volume_id_internal.h"
 
 struct ufs_super_block {
diff --git a/util-linux/volume_id/unused_via_raid.c b/util-linux/volume_id/unused_via_raid.c
index 8ef06f1ac..258f93a4f 100644
--- a/util-linux/volume_id/unused_via_raid.c
+++ b/util-linux/volume_id/unused_via_raid.c
@@ -20,6 +20,15 @@
 
 //kbuild:### lib-$(CONFIG_FEATURE_VOLUMEID_VIARAID) += via_raid.o
 
+//config:
+//config:### config FEATURE_VOLUMEID_VIARAID
+//config:###    bool "via raid"
+//config:###    default y
+//config:###    depends on VOLUMEID
+//config:###    help
+//config:###      TODO
+//config:
+
 #include "volume_id_internal.h"
 
 struct via_meta {
diff --git a/util-linux/volume_id/xfs.c b/util-linux/volume_id/xfs.c
index 44d35fbb6..5eefc201d 100644
--- a/util-linux/volume_id/xfs.c
+++ b/util-linux/volume_id/xfs.c
@@ -20,6 +20,15 @@
 
 //kbuild:lib-$(CONFIG_FEATURE_VOLUMEID_XFS) += xfs.o
 
+//config:
+//config:config FEATURE_VOLUMEID_XFS
+//config:       bool "xfs filesystem"
+//config:       default y
+//config:       depends on VOLUMEID
+//config:       help
+//config:         TODO
+//config:
+
 #include "volume_id_internal.h"
 
 struct xfs_super_block {