[openwrt/openwrt] kernel: drop mips highmem offset start overrides

[LEDE Commits]

nbd pushed a commit to openwrt/openwrt.git, branch openwrt-23.05:
https://git.openwrt.org/339e71cbd3f86e5901f600a6bb32c9d2613f3793

commit 339e71cbd3f86e5901f600a6bb32c9d2613f3793
Author: Felix Fietkau <nbd at nbd.name>
AuthorDate: Mon Jul 24 14:43:03 2023 +0200

    kernel: drop mips highmem offset start overrides
    
    The maximum offset that can be supported is 0x20000000
    Do not override it to to something bigger than that on MT7621, as that could
    cause issues based on the fixed memory mappings. This makes the last 64 MB
    RAM unusable on MT7621 devices with 512 MB but avoids incurring a heavy
    performance hit
    
    Fixes: cd2b74e01e8d ("ramips: mt7621: disable highmem support and remove highmem offset patch")
    Signed-off-by: Felix Fietkau <nbd at nbd.name>
    (cherry picked from commit a110de8152df46a1e2adf7010ba75fb3b1236cd8)
---
 .../pending-5.15/307-mips_highmem_offset.patch        | 19 -------------------
 .../patches-5.15/120-highmem-start-offset.patch       | 19 -------------------
 2 files changed, 38 deletions(-)

diff --git a/target/linux/generic/pending-5.15/307-mips_highmem_offset.patch b/target/linux/generic/pending-5.15/307-mips_highmem_offset.patch
deleted file mode 100644
index 0529b0c5c8..0000000000
--- a/target/linux/generic/pending-5.15/307-mips_highmem_offset.patch
+++ /dev/null
@@ -1,19 +0,0 @@
-From: Felix Fietkau <nbd at nbd.name>
-Subject: kernel: adjust mips highmem offset to avoid the need for -mlong-calls on systems with >256M RAM
-
-Signed-off-by: Felix Fietkau <nbd at nbd.name>
----
- arch/mips/include/asm/mach-generic/spaces.h | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
---- a/arch/mips/include/asm/mach-generic/spaces.h
-+++ b/arch/mips/include/asm/mach-generic/spaces.h
-@@ -46,7 +46,7 @@
-  * Memory above this physical address will be considered highmem.
-  */
- #ifndef HIGHMEM_START
--#define HIGHMEM_START		_AC(0x20000000, UL)
-+#define HIGHMEM_START		_AC(0x10000000, UL)
- #endif
- 
- #endif /* CONFIG_32BIT */
diff --git a/target/linux/ramips/patches-5.15/120-highmem-start-offset.patch b/target/linux/ramips/patches-5.15/120-highmem-start-offset.patch
deleted file mode 100644
index 629c7bfa5c..0000000000
--- a/target/linux/ramips/patches-5.15/120-highmem-start-offset.patch
+++ /dev/null
@@ -1,19 +0,0 @@
-From: Felix Fietkau <nbd at nbd.name>
-Date: Mon Jul 24 13:29:13 CEST 2023
-Subject: [PATCH] mips: ralink: increase highmem start
-
-Increase highmem start address in order to support devices with 512 MB memory
-and MT7621 SoC
-
-Signed-off-by: Felix Fietkau <nbd at nbd.name>
----
---- a/arch/mips/include/asm/mach-ralink/spaces.h
-+++ b/arch/mips/include/asm/mach-ralink/spaces.h
-@@ -5,6 +5,7 @@
- #define PCI_IOBASE	_AC(0xa0000000, UL)
- #define PCI_IOSIZE	SZ_16M
- #define IO_SPACE_LIMIT	(PCI_IOSIZE - 1)
-+#define HIGHMEM_START   _AC(0x24000000, UL)
- 
- #include <asm/mach-generic/spaces.h>
- #endif