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authorPaolo Ciarrocchi <paolo.ciarrocchi@gmail.com>2008-02-17 08:56:50 -0500
committerIngo Molnar <mingo@elte.hu>2008-02-19 10:18:32 -0500
commit0df025b709ae09081e21545761a249ec2d969689 (patch)
treec8be44ee7518981fd9a9f2327d0ec25f205a182b /arch/x86/lib/csum-wrappers_64.c
parent4b44f810166fb83ad1a817ee599006a7157ee54c (diff)
x86: coding style fixes in arch/x86/lib/csum-wrappers_64.c
no code changed: arch/x86/lib/csum-wrappers_64.o: text data bss dec hex filename 839 0 0 839 347 csum-wrappers_64.o.before 839 0 0 839 347 csum-wrappers_64.o.after md5: b31994226c33e0b52bef5a0e110b84b0 csum-wrappers_64.o.before.asm b31994226c33e0b52bef5a0e110b84b0 csum-wrappers_64.o.after.asm Signed-off-by: Paolo Ciarrocchi <paolo.ciarrocchi@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/lib/csum-wrappers_64.c')
-rw-r--r--arch/x86/lib/csum-wrappers_64.c80
1 files changed, 40 insertions, 40 deletions
diff --git a/arch/x86/lib/csum-wrappers_64.c b/arch/x86/lib/csum-wrappers_64.c
index fd42a4a095fc..95e45dcc5a29 100644
--- a/arch/x86/lib/csum-wrappers_64.c
+++ b/arch/x86/lib/csum-wrappers_64.c
@@ -1,117 +1,117 @@
1/* Copyright 2002,2003 Andi Kleen, SuSE Labs. 1/* Copyright 2002,2003 Andi Kleen, SuSE Labs.
2 * Subject to the GNU Public License v.2 2 * Subject to the GNU Public License v.2
3 * 3 *
4 * Wrappers of assembly checksum functions for x86-64. 4 * Wrappers of assembly checksum functions for x86-64.
5 */ 5 */
6 6
7#include <asm/checksum.h> 7#include <asm/checksum.h>
8#include <linux/module.h> 8#include <linux/module.h>
9 9
10/** 10/**
11 * csum_partial_copy_from_user - Copy and checksum from user space. 11 * csum_partial_copy_from_user - Copy and checksum from user space.
12 * @src: source address (user space) 12 * @src: source address (user space)
13 * @dst: destination address 13 * @dst: destination address
14 * @len: number of bytes to be copied. 14 * @len: number of bytes to be copied.
15 * @isum: initial sum that is added into the result (32bit unfolded) 15 * @isum: initial sum that is added into the result (32bit unfolded)
16 * @errp: set to -EFAULT for an bad source address. 16 * @errp: set to -EFAULT for an bad source address.
17 * 17 *
18 * Returns an 32bit unfolded checksum of the buffer. 18 * Returns an 32bit unfolded checksum of the buffer.
19 * src and dst are best aligned to 64bits. 19 * src and dst are best aligned to 64bits.
20 */ 20 */
21__wsum 21__wsum
22csum_partial_copy_from_user(const void __user *src, void *dst, 22csum_partial_copy_from_user(const void __user *src, void *dst,
23 int len, __wsum isum, int *errp) 23 int len, __wsum isum, int *errp)
24{ 24{
25 might_sleep(); 25 might_sleep();
26 *errp = 0; 26 *errp = 0;
27 if (likely(access_ok(VERIFY_READ,src, len))) { 27 if (likely(access_ok(VERIFY_READ, src, len))) {
28 /* Why 6, not 7? To handle odd addresses aligned we 28 /* Why 6, not 7? To handle odd addresses aligned we
29 would need to do considerable complications to fix the 29 would need to do considerable complications to fix the
30 checksum which is defined as an 16bit accumulator. The 30 checksum which is defined as an 16bit accumulator. The
31 fix alignment code is primarily for performance 31 fix alignment code is primarily for performance
32 compatibility with 32bit and that will handle odd 32 compatibility with 32bit and that will handle odd
33 addresses slowly too. */ 33 addresses slowly too. */
34 if (unlikely((unsigned long)src & 6)) { 34 if (unlikely((unsigned long)src & 6)) {
35 while (((unsigned long)src & 6) && len >= 2) { 35 while (((unsigned long)src & 6) && len >= 2) {
36 __u16 val16; 36 __u16 val16;
37 *errp = __get_user(val16, (const __u16 __user *)src); 37 *errp = __get_user(val16, (const __u16 __user *)src);
38 if (*errp) 38 if (*errp)
39 return isum; 39 return isum;
40 *(__u16 *)dst = val16; 40 *(__u16 *)dst = val16;
41 isum = (__force __wsum)add32_with_carry( 41 isum = (__force __wsum)add32_with_carry(
42 (__force unsigned)isum, val16); 42 (__force unsigned)isum, val16);
43 src += 2; 43 src += 2;
44 dst += 2; 44 dst += 2;
45 len -= 2; 45 len -= 2;
46 } 46 }
47 } 47 }
48 isum = csum_partial_copy_generic((__force const void *)src, 48 isum = csum_partial_copy_generic((__force const void *)src,
49 dst, len, isum, errp, NULL); 49 dst, len, isum, errp, NULL);
50 if (likely(*errp == 0)) 50 if (likely(*errp == 0))
51 return isum; 51 return isum;
52 } 52 }
53 *errp = -EFAULT; 53 *errp = -EFAULT;
54 memset(dst,0,len); 54 memset(dst, 0, len);
55 return isum; 55 return isum;
56} 56}
57 57
58EXPORT_SYMBOL(csum_partial_copy_from_user); 58EXPORT_SYMBOL(csum_partial_copy_from_user);
59 59
60/** 60/**
61 * csum_partial_copy_to_user - Copy and checksum to user space. 61 * csum_partial_copy_to_user - Copy and checksum to user space.
62 * @src: source address 62 * @src: source address
63 * @dst: destination address (user space) 63 * @dst: destination address (user space)
64 * @len: number of bytes to be copied. 64 * @len: number of bytes to be copied.
65 * @isum: initial sum that is added into the result (32bit unfolded) 65 * @isum: initial sum that is added into the result (32bit unfolded)
66 * @errp: set to -EFAULT for an bad destination address. 66 * @errp: set to -EFAULT for an bad destination address.
67 * 67 *
68 * Returns an 32bit unfolded checksum of the buffer. 68 * Returns an 32bit unfolded checksum of the buffer.
69 * src and dst are best aligned to 64bits. 69 * src and dst are best aligned to 64bits.
70 */ 70 */
71__wsum 71__wsum
72csum_partial_copy_to_user(const void *src, void __user *dst, 72csum_partial_copy_to_user(const void *src, void __user *dst,
73 int len, __wsum isum, int *errp) 73 int len, __wsum isum, int *errp)
74{ 74{
75 might_sleep(); 75 might_sleep();
76 if (unlikely(!access_ok(VERIFY_WRITE, dst, len))) { 76 if (unlikely(!access_ok(VERIFY_WRITE, dst, len))) {
77 *errp = -EFAULT; 77 *errp = -EFAULT;
78 return 0; 78 return 0;
79 } 79 }
80 80
81 if (unlikely((unsigned long)dst & 6)) { 81 if (unlikely((unsigned long)dst & 6)) {
82 while (((unsigned long)dst & 6) && len >= 2) { 82 while (((unsigned long)dst & 6) && len >= 2) {
83 __u16 val16 = *(__u16 *)src; 83 __u16 val16 = *(__u16 *)src;
84 isum = (__force __wsum)add32_with_carry( 84 isum = (__force __wsum)add32_with_carry(
85 (__force unsigned)isum, val16); 85 (__force unsigned)isum, val16);
86 *errp = __put_user(val16, (__u16 __user *)dst); 86 *errp = __put_user(val16, (__u16 __user *)dst);
87 if (*errp) 87 if (*errp)
88 return isum; 88 return isum;
89 src += 2; 89 src += 2;
90 dst += 2; 90 dst += 2;
91 len -= 2; 91 len -= 2;
92 } 92 }
93 } 93 }
94 94
95 *errp = 0; 95 *errp = 0;
96 return csum_partial_copy_generic(src, (void __force *)dst,len,isum,NULL,errp); 96 return csum_partial_copy_generic(src, (void __force *)dst, len, isum, NULL, errp);
97} 97}
98 98
99EXPORT_SYMBOL(csum_partial_copy_to_user); 99EXPORT_SYMBOL(csum_partial_copy_to_user);
100 100
101/** 101/**
102 * csum_partial_copy_nocheck - Copy and checksum. 102 * csum_partial_copy_nocheck - Copy and checksum.
103 * @src: source address 103 * @src: source address
104 * @dst: destination address 104 * @dst: destination address
105 * @len: number of bytes to be copied. 105 * @len: number of bytes to be copied.
106 * @isum: initial sum that is added into the result (32bit unfolded) 106 * @isum: initial sum that is added into the result (32bit unfolded)
107 * 107 *
108 * Returns an 32bit unfolded checksum of the buffer. 108 * Returns an 32bit unfolded checksum of the buffer.
109 */ 109 */
110__wsum 110__wsum
111csum_partial_copy_nocheck(const void *src, void *dst, int len, __wsum sum) 111csum_partial_copy_nocheck(const void *src, void *dst, int len, __wsum sum)
112{ 112{
113 return csum_partial_copy_generic(src,dst,len,sum,NULL,NULL); 113 return csum_partial_copy_generic(src, dst, len, sum, NULL, NULL);
114} 114}
115EXPORT_SYMBOL(csum_partial_copy_nocheck); 115EXPORT_SYMBOL(csum_partial_copy_nocheck);
116 116
117__sum16 csum_ipv6_magic(const struct in6_addr *saddr, 117__sum16 csum_ipv6_magic(const struct in6_addr *saddr,
@@ -119,16 +119,16 @@ __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
119 __u32 len, unsigned short proto, __wsum sum) 119 __u32 len, unsigned short proto, __wsum sum)
120{ 120{
121 __u64 rest, sum64; 121 __u64 rest, sum64;
122 122
123 rest = (__force __u64)htonl(len) + (__force __u64)htons(proto) + 123 rest = (__force __u64)htonl(len) + (__force __u64)htons(proto) +
124 (__force __u64)sum; 124 (__force __u64)sum;
125 asm(" addq (%[saddr]),%[sum]\n" 125 asm(" addq (%[saddr]),%[sum]\n"
126 " adcq 8(%[saddr]),%[sum]\n" 126 " adcq 8(%[saddr]),%[sum]\n"
127 " adcq (%[daddr]),%[sum]\n" 127 " adcq (%[daddr]),%[sum]\n"
128 " adcq 8(%[daddr]),%[sum]\n" 128 " adcq 8(%[daddr]),%[sum]\n"
129 " adcq $0,%[sum]\n" 129 " adcq $0,%[sum]\n"
130 : [sum] "=r" (sum64) 130 : [sum] "=r" (sum64)
131 : "[sum]" (rest),[saddr] "r" (saddr), [daddr] "r" (daddr)); 131 : "[sum]" (rest), [saddr] "r" (saddr), [daddr] "r" (daddr));
132 return csum_fold((__force __wsum)add32_with_carry(sum64 & 0xffffffff, sum64>>32)); 132 return csum_fold((__force __wsum)add32_with_carry(sum64 & 0xffffffff, sum64>>32));
133} 133}
134 134