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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>
This commit is contained in:
Rafał Miłecki 2022-11-08 12:22:51 +01:00
parent 8cdafa149e
commit e4770db163
2 changed files with 12 additions and 10 deletions
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11
target/linux/generic/pending-5.10/400-mtd-mtdsplit-support.patch
View File

@ -64,7 +64,7 @@ SVN-Revision: 38002
/*
* 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;
}
@ -196,7 +196,8 @@ SVN-Revision: 38002
+ 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;
@ -211,7 +212,7 @@ SVN-Revision: 38002
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;
@ -219,7 +220,7 @@ SVN-Revision: 38002
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;
}
@ -227,7 +228,7 @@ SVN-Revision: 38002
mtd_add_partition_attrs(child);
/* Look for subpartitions */
@@ -439,31 +583,6 @@ err_del_partitions:
@@ -439,31 +584,6 @@ err_del_partitions:
return ret;
}

11
target/linux/generic/pending-5.15/400-mtd-mtdsplit-support.patch
View File

@ -66,7 +66,7 @@ Subject: [PATCH] mtd: mtdsplit support
/*
* MTD methods which simply translate the effective address and pass through
@@ -236,6 +238,146 @@ static int mtd_add_partition_attrs(struc
@@ -236,6 +238,147 @@ static int mtd_add_partition_attrs(struc
return ret;
}
@ -198,7 +198,8 @@ Subject: [PATCH] mtd: mtdsplit support
+ 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;
@ -213,7 +214,7 @@ Subject: [PATCH] mtd: mtdsplit support
int mtd_add_partition(struct mtd_info *parent, const char *name,
long long offset, long long length)
{
@@ -274,6 +416,7 @@ int mtd_add_partition(struct mtd_info *p
@@ -274,6 +417,7 @@ int mtd_add_partition(struct mtd_info *p
if (ret)
goto err_remove_part;
@ -221,7 +222,7 @@ Subject: [PATCH] mtd: mtdsplit support
mtd_add_partition_attrs(child);
return 0;
@@ -422,6 +565,7 @@ int add_mtd_partitions(struct mtd_info *
@@ -422,6 +566,7 @@ int add_mtd_partitions(struct mtd_info *
goto err_del_partitions;
}
@ -229,7 +230,7 @@ Subject: [PATCH] mtd: mtdsplit support
mtd_add_partition_attrs(child);
/* Look for subpartitions */
@@ -438,31 +582,6 @@ err_del_partitions:
@@ -438,31 +583,6 @@ err_del_partitions:
return ret;
}