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authorChristoph Hellwig <hch@lst.de>2023-05-31 14:55:21 +0200
committerJens Axboe <axboe@kernel.dk>2023-06-05 10:55:20 -0600
commit07d63cbb67cdb5e2a7720fdd8579b3be979c2d66 (patch)
treea573356aeff5a9584d93c89e7f3a8afb1b814e3f /init
parent73231b58b1b496d631fa0ecf9fa7f64f5a07c6e3 (diff)
init: handle ubi/mtd root mounting like all other root types
Assign a Root_Generic magic value for UBI/MTD root and handle the root mounting in mount_root like all other root types. Besides making the code more clear this also means that UBI/MTD root can be used together with an initrd (not that anyone should care). Also factor parsing of the root name into a helper now that it can be easily done and will get more complicated with subsequent patches. Signed-off-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20230531125535.676098-11-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'init')
-rw-r--r--init/do_mounts.c23
1 files changed, 14 insertions, 9 deletions
diff --git a/init/do_mounts.c b/init/do_mounts.c
index 74cc96bffbdd..be6d14733ba0 100644
--- a/init/do_mounts.c
+++ b/init/do_mounts.c
@@ -591,6 +591,10 @@ void __init mount_root(char *root_device_name)
case Root_CIFS:
mount_cifs_root();
break;
+ case Root_Generic:
+ mount_root_generic(root_device_name, root_device_name,
+ root_mountflags);
+ break;
case 0:
if (root_device_name && root_fs_names &&
mount_nodev_root(root_device_name) == 0)
@@ -602,6 +606,14 @@ void __init mount_root(char *root_device_name)
}
}
+static dev_t __init parse_root_device(char *root_device_name)
+{
+ if (!strncmp(root_device_name, "mtd", 3) ||
+ !strncmp(root_device_name, "ubi", 3))
+ return Root_Generic;
+ return name_to_dev_t(root_device_name);
+}
+
/*
* Prepare the namespace - decide what/where to mount, load ramdisks, etc.
*/
@@ -624,15 +636,8 @@ void __init prepare_namespace(void)
md_run_setup();
- if (saved_root_name[0]) {
- if (!strncmp(saved_root_name, "mtd", 3) ||
- !strncmp(saved_root_name, "ubi", 3)) {
- mount_root_generic(saved_root_name, saved_root_name,
- root_mountflags);
- goto out;
- }
- ROOT_DEV = name_to_dev_t(saved_root_name);
- }
+ if (saved_root_name[0])
+ ROOT_DEV = parse_root_device(saved_root_name);
if (initrd_load(saved_root_name))
goto out;