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authorAl Viro <viro@zeniv.linux.org.uk>2008-05-11 23:55:10 -0400
committerBryan Wu <cooloney@kernel.org>2008-05-11 23:55:10 -0400
commit45b3947c2de5841d691f1d27d30419b9fae2d86c (patch)
tree151f070291fddbd934e2c004b284e8a59c29eb79 /include/asm-blackfin
parentb8291ad07a7f3b5b990900f0001198ac23ba893e (diff)
[Blackfin] arch: Blackfin checksum annotations
FSVOtest in this case, since I don't have the hardware... However, all changes seen by gcc are actually - explicit cast to unsigned short in return expression of functions returning unsigned short - csum_fold() return type changed from unsigned int to __sum16 (unsigned short), same as for all other architecture and as net/* expects; expression actually returned is ((~(sum << 16)) >> 16) with sum being unsigned 32bit, so it's (a) going to fit into the range of unsigned short and (b) had been unsigned all along, so no sign expansion mess happened. Tested-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David Miller <davem@davemloft.net> Signed-off-by: Bryan Wu <cooloney@kernel.org>
Diffstat (limited to 'include/asm-blackfin')
-rw-r--r--include/asm-blackfin/checksum.h29
1 files changed, 14 insertions, 15 deletions
diff --git a/include/asm-blackfin/checksum.h b/include/asm-blackfin/checksum.h
index 2638f2586d2f..6f6af2b8e9e0 100644
--- a/include/asm-blackfin/checksum.h
+++ b/include/asm-blackfin/checksum.h
@@ -15,7 +15,7 @@
15 * 15 *
16 * it's best to have buff aligned on a 32-bit boundary 16 * it's best to have buff aligned on a 32-bit boundary
17 */ 17 */
18unsigned int csum_partial(const unsigned char *buff, int len, unsigned int sum); 18__wsum csum_partial(const void *buff, int len, __wsum sum);
19 19
20/* 20/*
21 * the same as csum_partial, but copies from src while it 21 * the same as csum_partial, but copies from src while it
@@ -25,8 +25,8 @@ unsigned int csum_partial(const unsigned char *buff, int len, unsigned int sum);
25 * better 64-bit) boundary 25 * better 64-bit) boundary
26 */ 26 */
27 27
28unsigned int csum_partial_copy(const unsigned char *src, unsigned char *dst, 28__wsum csum_partial_copy(const void *src, void *dst,
29 int len, int sum); 29 int len, __wsum sum);
30 30
31/* 31/*
32 * the same as csum_partial_copy, but copies from user space. 32 * the same as csum_partial_copy, but copies from user space.
@@ -35,20 +35,19 @@ unsigned int csum_partial_copy(const unsigned char *src, unsigned char *dst,
35 * better 64-bit) boundary 35 * better 64-bit) boundary
36 */ 36 */
37 37
38extern unsigned int csum_partial_copy_from_user(const unsigned char *src, 38extern __wsum csum_partial_copy_from_user(const void __user *src, void *dst,
39 unsigned char *dst, int len, 39 int len, __wsum sum, int *csum_err);
40 int sum, int *csum_err);
41 40
42#define csum_partial_copy_nocheck(src, dst, len, sum) \ 41#define csum_partial_copy_nocheck(src, dst, len, sum) \
43 csum_partial_copy((src), (dst), (len), (sum)) 42 csum_partial_copy((src), (dst), (len), (sum))
44 43
45unsigned short ip_fast_csum(unsigned char *iph, unsigned int ihl); 44__sum16 ip_fast_csum(unsigned char *iph, unsigned int ihl);
46 45
47/* 46/*
48 * Fold a partial checksum 47 * Fold a partial checksum
49 */ 48 */
50 49
51static inline unsigned int csum_fold(unsigned int sum) 50static inline __sum16 csum_fold(__wsum sum)
52{ 51{
53 while (sum >> 16) 52 while (sum >> 16)
54 sum = (sum & 0xffff) + (sum >> 16); 53 sum = (sum & 0xffff) + (sum >> 16);
@@ -60,9 +59,9 @@ static inline unsigned int csum_fold(unsigned int sum)
60 * returns a 16-bit checksum, already complemented 59 * returns a 16-bit checksum, already complemented
61 */ 60 */
62 61
63static inline unsigned int 62static inline __wsum
64csum_tcpudp_nofold(unsigned long saddr, unsigned long daddr, unsigned short len, 63csum_tcpudp_nofold(__be32 saddr, __be32 daddr, unsigned short len,
65 unsigned short proto, unsigned int sum) 64 unsigned short proto, __wsum sum)
66{ 65{
67 66
68 __asm__ ("%0 = %0 + %1;\n\t" 67 __asm__ ("%0 = %0 + %1;\n\t"
@@ -84,9 +83,9 @@ csum_tcpudp_nofold(unsigned long saddr, unsigned long daddr, unsigned short len,
84 return (sum); 83 return (sum);
85} 84}
86 85
87static inline unsigned short int 86static inline __sum16
88csum_tcpudp_magic(unsigned long saddr, unsigned long daddr, unsigned short len, 87csum_tcpudp_magic(__be32 saddr, __be32 daddr, unsigned short len,
89 unsigned short proto, unsigned int sum) 88 unsigned short proto, __wsum sum)
90{ 89{
91 return csum_fold(csum_tcpudp_nofold(saddr, daddr, len, proto, sum)); 90 return csum_fold(csum_tcpudp_nofold(saddr, daddr, len, proto, sum));
92} 91}
@@ -96,6 +95,6 @@ csum_tcpudp_magic(unsigned long saddr, unsigned long daddr, unsigned short len,
96 * in icmp.c 95 * in icmp.c
97 */ 96 */
98 97
99extern unsigned short ip_compute_csum(const unsigned char *buff, int len); 98extern __sum16 ip_compute_csum(const void *buff, int len);
100 99
101#endif /* _BFIN_CHECKSUM_H */ 100#endif /* _BFIN_CHECKSUM_H */