backports: add trace_seq_buffer_ptr() where needed

Some new code needs this, add it.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/backport/compat/backport-4.0.c b/backport/compat/backport-4.0.c
index 71095f1921a087a1265933ca4cd0d4f816b2d29b..eb9508267dffc6325079dc020a81a2f75bd04a96 100644 (file)
--- a/backport/compat/backport-4.0.c
+++ b/backport/compat/backport-4.0.c
@@ -324,6 +324,14 @@ overflow1:
 }
 EXPORT_SYMBOL_GPL(hex_dump_to_buffer);
 
+#if LINUX_VERSION_IS_LESS(3,17,0)
+static inline unsigned char *
+trace_seq_buffer_ptr(struct trace_seq *s)
+{
+       return s->buffer + s->len;
+}
+#endif
+
 const char *
 ftrace_print_array_seq(struct trace_seq *p, const void *buf, int buf_len,
                       size_t el_size)