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-rw-r--r--arch/c6x/lib/checksum.c36
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/c6x/lib/checksum.c b/arch/c6x/lib/checksum.c
new file mode 100644
index 00000000000..67cc93b0b93
--- /dev/null
+++ b/arch/c6x/lib/checksum.c
@@ -0,0 +1,36 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include <linux/module.h>
+#include <net/checksum.h>
+
+#include <asm/byteorder.h>
+
+/*
+ * copy from fs while checksumming, otherwise like csum_partial
+ */
+__wsum
+csum_partial_copy_from_user(const void __user *src, void *dst, int len,
+ __wsum sum, int *csum_err)
+{
+ int missing;
+
+ missing = __copy_from_user(dst, src, len);
+ if (missing) {
+ memset(dst + len - missing, 0, missing);
+ *csum_err = -EFAULT;
+ } else
+ *csum_err = 0;
+
+ return csum_partial(dst, len, sum);
+}
+EXPORT_SYMBOL(csum_partial_copy_from_user);
+
+/* These are from csum_64plus.S */
+EXPORT_SYMBOL(csum_partial);
+EXPORT_SYMBOL(csum_partial_copy);
+EXPORT_SYMBOL(ip_compute_csum);
+EXPORT_SYMBOL(ip_fast_csum);