Merge remote-tracking branch 'remotes/stable/linux-4.4.y' into karo-tx6-mainline

[karo-tx-linux.git] / lib / strncpy_from_user.c

diff --git a/lib/strncpy_from_user.c b/lib/strncpy_from_user.c
index ead8c4a068d12a5f1f9967d448130337cc870ef1..e0af6ff73d146cfa3356080ebcb1bbea36cd1f96 100644 (file)
--- a/lib/strncpy_from_user.c
+++ b/lib/strncpy_from_user.c
@@ -112,44 +112,3 @@ long strncpy_from_user(char *dst, const char __user *src, long count)
        return -EFAULT;
 }
 EXPORT_SYMBOL(strncpy_from_user);
-
-/**
- * strncpy_from_unsafe: - Copy a NUL terminated string from unsafe address.
- * @dst:   Destination address, in kernel space.  This buffer must be at
- *         least @count bytes long.
- * @src:   Unsafe address.
- * @count: Maximum number of bytes to copy, including the trailing NUL.
- *
- * Copies a NUL-terminated string from unsafe address to kernel buffer.
- *
- * On success, returns the length of the string INCLUDING the trailing NUL.
- *
- * If access fails, returns -EFAULT (some data may have been copied
- * and the trailing NUL added).
- *
- * If @count is smaller than the length of the string, copies @count-1 bytes,
- * sets the last byte of @dst buffer to NUL and returns @count.
- */
-long strncpy_from_unsafe(char *dst, const void *unsafe_addr, long count)
-{
-       mm_segment_t old_fs = get_fs();
-       const void *src = unsafe_addr;
-       long ret;
-
-       if (unlikely(count <= 0))
-               return 0;
-
-       set_fs(KERNEL_DS);
-       pagefault_disable();
-
-       do {
-               ret = __copy_from_user_inatomic(dst++,
-                                               (const void __user __force *)src++, 1);
-       } while (dst[-1] && ret == 0 && src - unsafe_addr < count);
-
-       dst[-1] = '\0';
-       pagefault_enable();
-       set_fs(old_fs);
-
-       return ret < 0 ? ret : src - unsafe_addr;
-}