microblaze_v8: uaccess files

Reviewed-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com>
Acked-by: John Linn <john.linn@xilinx.com>
Acked-by: John Williams <john.williams@petalogix.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>

1 files changed, 41 insertions, 0 deletions

diff --git a/arch/microblaze/lib/uaccess.c b/arch/microblaze/lib/uaccess.c
new file mode 100644
index 000000000000..8eb9df5a26c9
--- /dev/null
+++ b/arch/microblaze/lib/uaccess.c
@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2006 Atmark Techno, Inc.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/string.h>
+#include <asm/uaccess.h>
+
+#include <asm/bug.h>
+
+long strnlen_user(const char __user *src, long count)
+{
+        return strlen(src) + 1;
+}
+
+#define __do_strncpy_from_user(dst, src, count, res)                    \
+        do {                                                            \
+                char *tmp;                                              \
+                strncpy(dst, src, count);                               \
+                for (tmp = dst; *tmp && count > 0; tmp++, count--)      \
+                        ;                                               \
+                res = (tmp - dst);                                      \
+        } while (0)
+
+long __strncpy_from_user(char *dst, const char __user *src, long count)
+{
+        long res;
+        __do_strncpy_from_user(dst, src, count, res);
+        return res;
+}
+
+long strncpy_from_user(char *dst, const char __user *src, long count)
+{
+        long res = -EFAULT;
+        if (access_ok(VERIFY_READ, src, 1))
+                __do_strncpy_from_user(dst, src, count, res);
+        return res;
+}