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-rw-r--r--target/linux/generic/patches-3.18/307-mips_highmem_offset.patch17
-rw-r--r--target/linux/generic/patches-4.0/307-mips_highmem_offset.patch17
2 files changed, 34 insertions, 0 deletions
diff --git a/target/linux/generic/patches-3.18/307-mips_highmem_offset.patch b/target/linux/generic/patches-3.18/307-mips_highmem_offset.patch
new file mode 100644
index 0000000000..c9f0c84e30
--- /dev/null
+++ b/target/linux/generic/patches-3.18/307-mips_highmem_offset.patch
@@ -0,0 +1,17 @@
+Adjust highmem offset to 0x10000000 to ensure that all kmalloc allocations
+stay within the same 256M boundary. This ensures that -mlong-calls is not
+needed on systems with more than 256M RAM.
+
+Signed-off-by: Felix Fietkau <nbd@openwrt.org>
+---
+--- a/arch/mips/include/asm/mach-generic/spaces.h
++++ b/arch/mips/include/asm/mach-generic/spaces.h
+@@ -44,7 +44,7 @@
+ * 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/generic/patches-4.0/307-mips_highmem_offset.patch b/target/linux/generic/patches-4.0/307-mips_highmem_offset.patch
new file mode 100644
index 0000000000..c9f0c84e30
--- /dev/null
+++ b/target/linux/generic/patches-4.0/307-mips_highmem_offset.patch
@@ -0,0 +1,17 @@
+Adjust highmem offset to 0x10000000 to ensure that all kmalloc allocations
+stay within the same 256M boundary. This ensures that -mlong-calls is not
+needed on systems with more than 256M RAM.
+
+Signed-off-by: Felix Fietkau <nbd@openwrt.org>
+---
+--- a/arch/mips/include/asm/mach-generic/spaces.h
++++ b/arch/mips/include/asm/mach-generic/spaces.h
+@@ -44,7 +44,7 @@
+ * 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 */