openwrt/target/linux/ramips/patches-5.10/310-MIPS-Fix-memory-reservation-in-bootmem_init-for-cert.patch
Ilya Lipnitskiy 10267e1729 ramips: 5.10: port and refresh patches, ralink drv
Enable testing kernel.

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.

Run automatic quilt refresh on the rest.

Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>
2021-03-06 11:24:12 +01:00

46 lines
1.5 KiB
Diff

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;