+ size_t pagecpy);
+extern void _lib_ring_buffer_memset(struct lib_ring_buffer_backend *bufb,
+ size_t offset, int c, size_t len,
+ size_t pagecpy);
+extern void _lib_ring_buffer_strcpy(struct lib_ring_buffer_backend *bufb,
+ size_t offset, const char *src, size_t len,
+ size_t pagecpy, int pad);
+extern void _lib_ring_buffer_copy_from_user_inatomic(struct lib_ring_buffer_backend *bufb,
+ size_t offset, const void *src,
+ size_t len, size_t pagecpy);
+extern void _lib_ring_buffer_strcpy_from_user_inatomic(struct lib_ring_buffer_backend *bufb,
+ size_t offset, const char __user *src, size_t len,
+ size_t pagecpy, int pad);