C6X: library code

Original port to early 2.6 kernel using TI COFF toolchain.
Brought up to date by Mark Salter <msalter@redhat.com>

Signed-off-by: Aurelien Jacquiot <a-jacquiot@ti.com>
Signed-off-by: Mark Salter <msalter@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>

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 000000000000..67cc93b0b932
--- /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);