ostree-initrd: Make it an initramfs, not initrd

The reasoning here is to allow initramfs generated by this recipe
to be included in FIT.

To do so w/o changing openembedded-core (it allows only cpio format) -
init script should be able to execute from a rootfs (i.e. true initramfs),
not ramdisk (initrd).
See [1] for more information on these keywords.

The gist of this change is switch from `pivot_root` to `switch_root`.
This also allows to get rid of some clutter, since `switch_root` handles
transition to new sysroot all by itself.
Again, see [1] for details on these utility/syscall.

[1] https://www.kernel.org/doc/Documentation/filesystems/ramfs-rootfs-initramfs.txt

Signed-off-by: Yevgeny Popovych <yevgenyp@pointgrab.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/classes/sota_qemux86-64.bbclass b/classes/sota_qemux86-64.bbclass
index 9ef531d..0850af6 100644
--- a/classes/sota_qemux86-64.bbclass
+++ b/classes/sota_qemux86-64.bbclass
@@ -4,7 +4,7 @@ IMAGE_FSTYPES_remove = "wic"
 PREFERRED_PROVIDER_virtual/bootloader_sota = "u-boot"
 UBOOT_MACHINE_sota = "qemu-x86_defconfig"
 OSTREE_BOOTLOADER ?= "u-boot"
-INITRAMFS_FSTYPES ?= "ext4.gz"
+INITRAMFS_FSTYPES ?= "cpio.gz"
 
 OSTREE_KERNEL_ARGS ?= "ramdisk_size=16384 rw rootfstype=ext4 rootwait rootdelay=2 ostree_root=/dev/hda"