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| author | Felix Fietkau <nbd@nbd.name> | 2023-07-24 14:43:03 +0200 |
|---|---|---|
| committer | Felix Fietkau <nbd@nbd.name> | 2023-07-24 20:19:11 +0200 |
| commit | 339e71cbd3f86e5901f600a6bb32c9d2613f3793 (patch) | |
| tree | 9e4a07eb73483af2cfe04485940fd2d0348d6457 /target/linux/generic/pending-5.15 | |
| parent | e5dea9e37f1953d0cc4b846a530ff4247bf08ee0 (diff) | |
| download | upstream-339e71cbd3f86e5901f600a6bb32c9d2613f3793.tar.gz upstream-339e71cbd3f86e5901f600a6bb32c9d2613f3793.tar.bz2 upstream-339e71cbd3f86e5901f600a6bb32c9d2613f3793.zip | |
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@nbd.name>
(cherry picked from commit a110de8152df46a1e2adf7010ba75fb3b1236cd8)
Diffstat (limited to 'target/linux/generic/pending-5.15')
| -rw-r--r-- | target/linux/generic/pending-5.15/307-mips_highmem_offset.patch | 19 |
1 files changed, 0 insertions, 19 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@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@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 */ |