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kernel: support "linux,rootfs" DT property for splitting rootfs

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OpenWrt's support for splitting rootfs (to create an extra "rootfs_data"
partition) is limited to partitions called "rootfs". Upstream kernel
allows any name partition to be rootfs if it has "linux,rootfs" property
set. Add split support to such partitions in OpenWrt code.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
(cherry picked from commit e4770db163a9585c43bb70dc5d6d1e45ef848e4a)
This commit is contained in:
Rafał Miłecki 2022-11-08 12:22:51 +01:00
parent b66037f53b
commit 353e468f47
1 changed files with 6 additions and 5 deletions
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11
target/linux/generic/pending-5.10/400-mtd-mtdsplit-support.patch
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@ -42,7 +42,7 @@
/*
* MTD methods which simply translate the effective address and pass through
@@ -237,6 +239,146 @@ static int mtd_add_partition_attrs(struc
@@ -237,6 +239,147 @@ static int mtd_add_partition_attrs(struc
return ret;
}
@ -174,7 +174,8 @@
+ if (rootfs_found)
+ return;
+
+ if (!strcmp(part->name, "rootfs")) {
+ if (of_find_property(mtd_get_of_node(part), "linux,rootfs", NULL) ||
+ !strcmp(part->name, "rootfs")) {
+ run_parsers_by_type(part, MTD_PARSER_TYPE_ROOTFS);
+
+ rootfs_found = 1;
@ -189,7 +190,7 @@
int mtd_add_partition(struct mtd_info *parent, const char *name,
long long offset, long long length)
{
@@ -275,6 +417,7 @@ int mtd_add_partition(struct mtd_info *p
@@ -275,6 +418,7 @@ int mtd_add_partition(struct mtd_info *p
if (ret)
goto err_remove_part;
@ -197,7 +198,7 @@
mtd_add_partition_attrs(child);
return 0;
@@ -423,6 +566,7 @@ int add_mtd_partitions(struct mtd_info *
@@ -423,6 +567,7 @@ int add_mtd_partitions(struct mtd_info *
goto err_del_partitions;
}
@ -205,7 +206,7 @@
mtd_add_partition_attrs(child);
/* Look for subpartitions */
@@ -439,31 +583,6 @@ err_del_partitions:
@@ -439,31 +584,6 @@ err_del_partitions:
return ret;
}