ramips: add support for kernel 5.10

Enable testing kernel.

Delete upstreamed patches:
 0098-disable_cm.patch can be dropped, upstream fixed CM handling.

Fix compile errors by using new kernel APIs.

Fix fuzz by manually editing patches to ensure the code goes in the
right place.

For 721-NET-no-auto-carrier-off-support.patch, revert upstream commit
a307593a6 to keep the OpenWrt ralink driver operational.

Add mt7621-pci-phy patch to select REGMAP_MMIO as discussed in PR #3693
and #3952.

Rename patches to follow the 3-digit classification from the OpenWrt
Developer Guide.

Run automatic quilt refresh.

Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>

1 files changed, 45 insertions, 0 deletions

diff --git a/target/linux/ramips/patches-5.10/310-MIPS-Fix-memory-reservation-in-bootmem_init-for-cert.patch b/target/linux/ramips/patches-5.10/310-MIPS-Fix-memory-reservation-in-bootmem_init-for-cert.patch
new file mode 100644
index 0000000000..987ffbf3c4
--- /dev/null
+++ b/target/linux/ramips/patches-5.10/310-MIPS-Fix-memory-reservation-in-bootmem_init-for-cert.patch
@@ -0,0 +1,45 @@
+From: Tobias Wolf <dev-NTEO@vplace.de>
+Subject: [v2] MIPS: Fix memory reservation in bootmem_init for certain non-usermem setups
+
+Commit 67a3ba25aa95 ("MIPS: Fix incorrect mem=X@Y handling") introduced a new
+issue for rt288x where "PHYS_OFFSET" is 0x0 but the calculated "ramstart" is
+not. As the prerequisite of custom memory map has been removed, this results
+in the full memory range of 0x0 - 0x8000000 to be marked as reserved for this
+platform.
+
+v2: Correctly compare that usermem is not null.
+
+This patch adds the originally intended prerequisite again.
+
+Signed-off-by: Tobias Wolf <dev-NTEO@vplace.de>
+---
+
+--- a/arch/mips/kernel/setup.c
++++ b/arch/mips/kernel/setup.c
+@@ -249,6 +249,8 @@ static unsigned long __init init_initrd(
+  * Initialize the bootmem allocator. It also setup initrd related data
+  * if needed.
+  */
++static int usermem __initdata;
++
+ #if defined(CONFIG_SGI_IP27) || (defined(CONFIG_CPU_LOONGSON64) && defined(CONFIG_NUMA))
+ 
+ static void __init bootmem_init(void)
+@@ -288,7 +290,7 @@ static void __init bootmem_init(void)
+ 	/*
+ 	 * Reserve any memory between the start of RAM and PHYS_OFFSET
+ 	 */
+-	if (ramstart > PHYS_OFFSET)
++	if (usermem && ramstart > PHYS_OFFSET)
+ 		memblock_reserve(PHYS_OFFSET, ramstart - PHYS_OFFSET);
+ 
+ 	if (PFN_UP(ramstart) > ARCH_PFN_OFFSET) {
+@@ -336,8 +338,6 @@ static void __init bootmem_init(void)
+ 
+ #endif	/* CONFIG_SGI_IP27 */
+ 
+-static int usermem __initdata;
+-
+ static int __init early_parse_mem(char *p)
+ {
+ 	phys_addr_t start, size;