[PATCH v4 2/5] cramfs: make cramfs_physmem usable as root fs

[Nicolas Pitre <nicolas.pitre@xxxxxxxxxx>]

Signed-off-by: Nicolas Pitre <nico@xxxxxxxxxx>
Tested-by: Chris Brandt <chris.brandt@xxxxxxxxxxx>
---
 init/do_mounts.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/init/do_mounts.c b/init/do_mounts.c
index c2de5104aa..43b5817f60 100644
--- a/init/do_mounts.c
+++ b/init/do_mounts.c
@@ -556,6 +556,14 @@ void __init prepare_namespace(void)
 		ssleep(root_delay);
 	}
 
+	if (IS_ENABLED(CONFIG_CRAMFS_PHYSMEM) && root_fs_names &&
+	    !strcmp(root_fs_names, "cramfs_physmem")) {
+		int err = do_mount_root("cramfs", "cramfs_physmem",
+					root_mountflags, root_mount_data);
+		if (!err)
+			goto out;
+	}
+
 	/*
 	 * wait for the known devices to complete their probing
 	 *
-- 
2.9.5