tracing: Add __print_symbolic_u64 to avoid warnings on 32bit machine

Filesystem, like Btrfs, has some "ULL" macros, and when these macros are passed
to tracepoints'__print_symbolic(), there will be 64->32 truncate WARNINGS during
compiling on 32bit box.

Signed-off-by: Liu Bo <liubo2009@cn.fujitsu.com>
Link: http://lkml.kernel.org/r/4DACE6E0.7000507@cn.fujitsu.com
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

2 files changed, 25 insertions, 0 deletions

diff --git a/include/linux/ftrace_event.h b/include/linux/ftrace_event.h
index b5a550a39a70..59d3ef100eb9 100644
--- a/include/linux/ftrace_event.h
+++ b/include/linux/ftrace_event.h
@@ -16,6 +16,11 @@ struct trace_print_flags {
         const char              *name;
 };
 
+struct trace_print_flags_u64 {
+        unsigned long long      mask;
+        const char              *name;
+};
+
 const char *ftrace_print_flags_seq(struct trace_seq *p, const char *delim,
                                    unsigned long flags,
                                    const struct trace_print_flags *flag_array);
@@ -23,6 +28,13 @@ const char *ftrace_print_flags_seq(struct trace_seq *p, const char *delim,
 const char *ftrace_print_symbols_seq(struct trace_seq *p, unsigned long val,
                                      const struct trace_print_flags *symbol_array);
 
+#if BITS_PER_LONG == 32
+const char *ftrace_print_symbols_seq_u64(struct trace_seq *p,
+                                         unsigned long long val,
+                                         const struct trace_print_flags_u64
+                                                                 *symbol_array);
+#endif
+
 const char *ftrace_print_hex_seq(struct trace_seq *p,
                                  const unsigned char *buf, int len);
 
diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h
index 3e68366d485a..533c49f48047 100644
--- a/include/trace/ftrace.h
+++ b/include/trace/ftrace.h
@@ -205,6 +205,19 @@
                 ftrace_print_symbols_seq(p, value, symbols);            \
         })
 
+#undef __print_symbolic_u64
+#if BITS_PER_LONG == 32
+#define __print_symbolic_u64(value, symbol_array...)                    \
+        ({                                                              \
+                static const struct trace_print_flags_u64 symbols[] =   \
+                        { symbol_array, { -1, NULL } };                 \
+                ftrace_print_symbols_seq_u64(p, value, symbols);        \
+        })
+#else
+#define __print_symbolic_u64(value, symbol_array...)                    \
+                        __print_symbolic(value, symbol_array)
+#endif
+
 #undef __print_hex
 #define __print_hex(buf, buf_len) ftrace_print_hex_seq(p, buf, buf_len)