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[PATCH 3/5] MIPS: LLVMLinux: Fix an 'inline asm input/output type mismat

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Subject: [PATCH 3/5] MIPS: LLVMLinux: Fix an 'inline asm input/output type mismatch' error.
From: Daniel Sanders <>
Date: Tue, 3 Feb 2015 13:37:17 +0000
Cc: Toma Tabacu <>, Daniel Sanders <>, Ralf Baechle <>, Markos Chandras <>, Leonid Yegoshin <>, <>, <>
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From: Toma Tabacu <>

Change the type of csum_ipv6_magic's 'proto' argument from unsigned
short to __u32.

This fixes a type mismatch between the 'htonl(proto)' inline asm
input, which is __u32, and the 'proto' output, which is unsigned

This is the error message reported by clang:
arch/mips/include/asm/checksum.h:285:27: error: unsupported inline asm: input 
with type '__be32' (aka 'unsigned int') matching output with type 'unsigned 
          "0" (htonl(len)), "1" (htonl(proto)), "r" (sum));

The changed code can be compiled successfully by both gcc and clang.

Signed-off-by: Toma Tabacu <>
Signed-off-by: Daniel Sanders <>
Cc: Ralf Baechle <>
Cc: Markos Chandras <>
Cc: Leonid Yegoshin <>
 arch/mips/include/asm/checksum.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/mips/include/asm/checksum.h b/arch/mips/include/asm/checksum.h
index 3418c51..683b9e7 100644
--- a/arch/mips/include/asm/checksum.h
+++ b/arch/mips/include/asm/checksum.h
@@ -225,7 +225,7 @@ static inline __sum16 ip_compute_csum(const void *buff, int 
 static __inline__ __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
                                          const struct in6_addr *daddr,
-                                         __u32 len, unsigned short proto,
+                                         __u32 len, __u32 proto,
                                          __wsum sum)

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