linux-kernel - [PATCH] asm-generic: over-ride csum_partial_copy

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Message-ID: <20110831223519.GA14535@codeaurora.org>
Date:	Wed, 31 Aug 2011 17:35:19 -0500
From:	"Linas Vepstas (Code Aurora)" <linas@...eaurora.org>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] asm-generic: over-ride csum_partial_copy_nocheck, etc.


There are plausbile reasons for architectures to provide their own
versions of csum_partial_copy_nocheck and csum_tcpudp_magic. 
By protecting these, the architecture can still re-use the 
asm-generic checksum.h, instead of copying it.

Signed-off-by: Linas Vepstas <linas@...eaurora.org>

---
 include/asm-generic/checksum.h |    4 ++++
 1 file changed, 4 insertions(+)

Index: linux-hexagon-kernel/include/asm-generic/checksum.h
===================================================================
--- linux-hexagon-kernel.orig/include/asm-generic/checksum.h	2011-08-31 15:31:33.000000000 -0500
+++ linux-hexagon-kernel/include/asm-generic/checksum.h	2011-08-31 15:43:35.000000000 -0500
@@ -33,8 +33,10 @@ extern __wsum csum_partial_copy(const vo
 extern __wsum csum_partial_copy_from_user(const void __user *src, void *dst,
 					int len, __wsum sum, int *csum_err);
 
+#ifndef csum_partial_copy_nocheck
 #define csum_partial_copy_nocheck(src, dst, len, sum)	\
 	csum_partial_copy((src), (dst), (len), (sum))
+#endif
 
 /*
  * This is a version of ip_compute_csum() optimized for IP headers,
@@ -63,12 +65,14 @@ csum_tcpudp_nofold(__be32 saddr, __be32 
 		unsigned short proto, __wsum sum);
 #endif
 
+#ifndef csum_tcpudp_magic
 static inline __sum16
 csum_tcpudp_magic(__be32 saddr, __be32 daddr, unsigned short len,
 		  unsigned short proto, __wsum sum)
 {
 	return csum_fold(csum_tcpudp_nofold(saddr, daddr, len, proto, sum));
 }
+#endif
 
 /*
  * this routine is used for miscellaneous IP-like checksums, mainly
-- 
Sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.
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