Those definitions are only meant to be used in pure assembly code.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
---
 arch/mips/include/asm/regdef.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/mips/include/asm/regdef.h b/arch/mips/include/asm/regdef.h
index 3c687df1d515..87ba7be1a847 100644
--- a/arch/mips/include/asm/regdef.h
+++ b/arch/mips/include/asm/regdef.h
@@ -14,6 +14,7 @@
 
 #include <asm/sgidefs.h>
 
+#ifdef __ASSEMBLY__
 #if _MIPS_SIM == _MIPS_SIM_ABI32
 
 /*
@@ -102,5 +103,6 @@
 #define ra	$31	/* return address */
 
 #endif /* _MIPS_SIM == _MIPS_SIM_ABI64 || _MIPS_SIM == _MIPS_SIM_NABI32 */
+#endif /* __ASSEMBLY__ */
 
 #endif /* _ASM_REGDEF_H */

-- 
2.43.0