From: Tom Herbert <therbert@google.com>
Date: Fri, 2 May 2014 23:28:15 +0000 (-0700)
Subject: x86_64: csum_add for x86_64
X-Git-Tag: android-x86-4.4-r2~1003^2~278^2~6
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=a278534406ab13e4ecbca8941eb4c104a5971cd7;p=android-x86%2Fkernel.git

x86_64: csum_add for x86_64

Add csum_add function for x86_64.

Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/arch/x86/include/asm/checksum_64.h b/arch/x86/include/asm/checksum_64.h
index e6fd8a026c7b..3581761bd86c 100644
--- a/arch/x86/include/asm/checksum_64.h
+++ b/arch/x86/include/asm/checksum_64.h
@@ -188,4 +188,11 @@ static inline unsigned add32_with_carry(unsigned a, unsigned b)
 	return a;
 }
 
+#define HAVE_ARCH_CSUM_ADD
+static inline __wsum csum_add(__wsum csum, __wsum addend)
+{
+	return (__force __wsum)add32_with_carry((__force unsigned)csum,
+						(__force unsigned)addend);
+}
+
 #endif /* _ASM_X86_CHECKSUM_64_H */