kernel: copy kernel 4.19 code to 5.4

No changes were done to the patches while coping them. Currently they do
not apply on top of kernel 5.4.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

1 files changed, 51 insertions, 0 deletions

diff --git a/target/linux/generic/pending-5.4/492-try-auto-mounting-ubi0-rootfs-in-init-do_mounts.c.patch b/target/linux/generic/pending-5.4/492-try-auto-mounting-ubi0-rootfs-in-init-do_mounts.c.patch
new file mode 100644
index 0000000000..b76e83e4a3
--- /dev/null
+++ b/target/linux/generic/pending-5.4/492-try-auto-mounting-ubi0-rootfs-in-init-do_mounts.c.patch
@@ -0,0 +1,51 @@
+From: Daniel Golle <daniel@makrotopia.org>
+Subject: try auto-mounting ubi0:rootfs in init/do_mounts.c
+
+Signed-off-by: Daniel Golle <daniel@makrotopia.org>
+---
+ init/do_mounts.c | 26 +++++++++++++++++++++++++-
+ 1 file changed, 25 insertions(+), 1 deletion(-)
+
+--- a/init/do_mounts.c
++++ b/init/do_mounts.c
+@@ -427,7 +427,28 @@ retry:
+ out:
+ 	put_page(page);
+ }
+- 
++
++static int __init mount_ubi_rootfs(void)
++{
++	int flags = MS_SILENT;
++	int err, tried = 0;
++
++	while (tried < 2) {
++		err = do_mount_root("ubi0:rootfs", "ubifs", flags, \
++					root_mount_data);
++		switch (err) {
++			case -EACCES:
++				flags |= MS_RDONLY;
++				tried++;
++				break;
++			default:
++				return err;
++		}
++	}
++
++	return -EINVAL;
++}
++
+ #ifdef CONFIG_ROOT_NFS
+ 
+ #define NFSROOT_TIMEOUT_MIN	5
+@@ -521,6 +542,10 @@ void __init mount_root(void)
+ 			change_floppy("root floppy");
+ 	}
+ #endif
++#ifdef CONFIG_MTD_ROOTFS_ROOT_DEV
++	if (!mount_ubi_rootfs())
++		return;
++#endif
+ #ifdef CONFIG_BLOCK
+ 	{
+ 		int err = create_dev("/dev/root", ROOT_DEV);