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-rw-r--r--arch/frv/lib/checksum.c31
1 files changed, 25 insertions, 6 deletions
diff --git a/arch/frv/lib/checksum.c b/arch/frv/lib/checksum.c
index 7bf5bd6cac8a..20e7dfc474ef 100644
--- a/arch/frv/lib/checksum.c
+++ b/arch/frv/lib/checksum.c
@@ -33,6 +33,7 @@
#include <net/checksum.h>
#include <asm/checksum.h>
+#include <linux/module.h>
static inline unsigned short from32to16(unsigned long x)
{
@@ -115,34 +116,52 @@ unsigned int csum_partial(const unsigned char * buff, int len, unsigned int sum)
return result;
}
+EXPORT_SYMBOL(csum_partial);
+
/*
* this routine is used for miscellaneous IP-like checksums, mainly
* in icmp.c
*/
unsigned short ip_compute_csum(const unsigned char * buff, int len)
{
- return ~do_csum(buff,len);
+ return ~do_csum(buff, len);
}
+EXPORT_SYMBOL(ip_compute_csum);
+
/*
* copy from fs while checksumming, otherwise like csum_partial
*/
-
unsigned int
-csum_partial_copy_from_user(const char *src, char *dst, int len, int sum, int *csum_err)
+csum_partial_copy_from_user(const char __user *src, char *dst,
+ int len, int sum, int *csum_err)
{
- if (csum_err) *csum_err = 0;
- memcpy(dst, src, len);
+ int rem;
+
+ if (csum_err)
+ *csum_err = 0;
+
+ rem = copy_from_user(dst, src, len);
+ if (rem != 0) {
+ if (csum_err)
+ *csum_err = -EFAULT;
+ memset(dst + len - rem, 0, rem);
+ len = rem;
+ }
+
return csum_partial(dst, len, sum);
}
+EXPORT_SYMBOL(csum_partial_copy_from_user);
+
/*
* copy from ds while checksumming, otherwise like csum_partial
*/
-
unsigned int
csum_partial_copy(const char *src, char *dst, int len, int sum)
{
memcpy(dst, src, len);
return csum_partial(dst, len, sum);
}
+
+EXPORT_SYMBOL(csum_partial_copy);