target/linux/generic/patches-3.18/307-mips_highmem_offset.patch

   1 Adjust highmem offset to 0x10000000 to ensure that all kmalloc allocations
   2 stay within the same 256M boundary. This ensures that -mlong-calls is not
   3 needed on systems with more than 256M RAM.
   4
   5 Signed-off-by: Felix Fietkau <nbd@openwrt.org>
   6 ---
   7 --- a/arch/mips/include/asm/mach-generic/spaces.h
   8 +++ b/arch/mips/include/asm/mach-generic/spaces.h
   9 @@ -44,7 +44,7 @@
  10   * Memory above this physical address will be considered highmem.
  11   */
  12  #ifndef HIGHMEM_START
  13 -#define HIGHMEM_START          _AC(0x20000000, UL)
  14 +#define HIGHMEM_START          _AC(0x10000000, UL)
  15  #endif
  16
  17  #endif /* CONFIG_32BIT */