[PATCH 3/3] dm: lookup_ioctl(): Use designated array initialers

[David Laight <david.laight.linux@gmail.com>]

Use designated initialisers for the _ioctls[] array and delete the
unused field that contained the array index.

Makes the code more robust against the order of the initialers.
Any uninitialised entries would be processed corretly.

Signed-off-by: David Laight <david.laight.linux@gmail.com>
---
 drivers/md/dm-ioctl.c | 47 +++++++++++++++++++++----------------------
 1 file changed, 23 insertions(+), 24 deletions(-)

diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c
index 57cfbc12c0ce..2ba1eda1c9dd 100644
--- a/drivers/md/dm-ioctl.c
+++ b/drivers/md/dm-ioctl.c
@@ -1851,33 +1851,32 @@ static int target_message(struct file *filp, struct dm_ioctl *param, size_t para
 static ioctl_fn lookup_ioctl(unsigned int cmd, int *ioctl_flags)
 {
 	static const struct {
-		int cmd;
 		int flags;
 		ioctl_fn fn;
 	} _ioctls[] = {
-		{DM_VERSION_CMD, 0, NULL}, /* version is dealt with elsewhere */
-		{DM_REMOVE_ALL_CMD, IOCTL_FLAGS_NO_PARAMS | IOCTL_FLAGS_ISSUE_GLOBAL_EVENT, remove_all},
-		{DM_LIST_DEVICES_CMD, 0, list_devices},
-
-		{DM_DEV_CREATE_CMD, IOCTL_FLAGS_NO_PARAMS | IOCTL_FLAGS_ISSUE_GLOBAL_EVENT, dev_create},
-		{DM_DEV_REMOVE_CMD, IOCTL_FLAGS_NO_PARAMS | IOCTL_FLAGS_ISSUE_GLOBAL_EVENT, dev_remove},
-		{DM_DEV_RENAME_CMD, IOCTL_FLAGS_ISSUE_GLOBAL_EVENT, dev_rename},
-		{DM_DEV_SUSPEND_CMD, IOCTL_FLAGS_NO_PARAMS, dev_suspend},
-		{DM_DEV_STATUS_CMD, IOCTL_FLAGS_NO_PARAMS, dev_status},
-		{DM_DEV_WAIT_CMD, 0, dev_wait},
-
-		{DM_TABLE_LOAD_CMD, 0, table_load},
-		{DM_TABLE_CLEAR_CMD, IOCTL_FLAGS_NO_PARAMS, table_clear},
-		{DM_TABLE_DEPS_CMD, 0, table_deps},
-		{DM_TABLE_STATUS_CMD, 0, table_status},
-
-		{DM_LIST_VERSIONS_CMD, 0, list_versions},
-
-		{DM_TARGET_MSG_CMD, 0, target_message},
-		{DM_DEV_SET_GEOMETRY_CMD, 0, dev_set_geometry},
-		{DM_DEV_ARM_POLL_CMD, IOCTL_FLAGS_NO_PARAMS, dev_arm_poll},
-		{DM_GET_TARGET_VERSION_CMD, 0, get_target_version},
-		{DM_MPATH_PROBE_PATHS_CMD, 0, NULL}, /* block device ioctl */
+		[DM_VERSION_CMD] = {0, NULL}, /* version is dealt with elsewhere */
+		[DM_REMOVE_ALL_CMD] = {IOCTL_FLAGS_NO_PARAMS | IOCTL_FLAGS_ISSUE_GLOBAL_EVENT, remove_all},
+		[DM_LIST_DEVICES_CMD] = {0, list_devices},
+
+		[DM_DEV_CREATE_CMD] = {IOCTL_FLAGS_NO_PARAMS | IOCTL_FLAGS_ISSUE_GLOBAL_EVENT, dev_create},
+		[DM_DEV_REMOVE_CMD] = {IOCTL_FLAGS_NO_PARAMS | IOCTL_FLAGS_ISSUE_GLOBAL_EVENT, dev_remove},
+		[DM_DEV_RENAME_CMD] = {IOCTL_FLAGS_ISSUE_GLOBAL_EVENT, dev_rename},
+		[DM_DEV_SUSPEND_CMD] = {IOCTL_FLAGS_NO_PARAMS, dev_suspend},
+		[DM_DEV_STATUS_CMD] = {IOCTL_FLAGS_NO_PARAMS, dev_status},
+		[DM_DEV_WAIT_CMD] = {0, dev_wait},
+
+		[DM_TABLE_LOAD_CMD] = {0, table_load},
+		[DM_TABLE_CLEAR_CMD] = {IOCTL_FLAGS_NO_PARAMS, table_clear},
+		[DM_TABLE_DEPS_CMD] = {0, table_deps},
+		[DM_TABLE_STATUS_CMD] = {0, table_status},
+
+		[DM_LIST_VERSIONS_CMD] = {0, list_versions},
+
+		[DM_TARGET_MSG_CMD] = {0, target_message},
+		[DM_DEV_SET_GEOMETRY_CMD] = {0, dev_set_geometry},
+		[DM_DEV_ARM_POLL_CMD] = {IOCTL_FLAGS_NO_PARAMS, dev_arm_poll},
+		[DM_GET_TARGET_VERSION_CMD] = {0, get_target_version},
+		[DM_MPATH_PROBE_PATHS_CMD] = {0, NULL}, /* block device ioctl */
 	};
 
 	if (unlikely(cmd >= ARRAY_SIZE(_ioctls)))
-- 
2.39.5