This is an incomplete proof of concept that I applied to be able to build a 64 bit kernel with GCC-4.4. It doesn't handle the 32 bit case or the R4000_WAR case. Comments welcome. Signed-off-by: David Daney --- arch/mips/include/asm/compiler.h | 7 +++++++ 2 files changed, 11 insertions(+), 0 deletions(-) --- a/arch/mips/include/asm/compiler.h +++ b/arch/mips/include/asm/compiler.h @@ -16,4 +16,11 @@ #define GCC_REG_ACCUM "accum" #endif +#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4) +#define GCC_NO_H_CONSTRAINT +#ifdef CONFIG_64BIT +typedef unsigned int uint128_t __attribute__((mode(TI))); +#endif +#endif + #endif /* _ASM_COMPILER_H */