tracing: Introduce TRACE_FIELD_ZERO() macro

Use TRACE_FIELD_ZERO(type, item) instead of TRACE_FIELD_ZERO_CHAR(item).
This also includes a typo fix of TRACE_ZERO_CHAR() macro.
Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Avi Kivity <avi@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Frank Ch. Eigler <fche@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Cc: K.Prasad <prasad@linux.vnet.ibm.com>
Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Cc: Przemysław Pawełczyk <przemyslaw@pawelczyk.it>
Cc: Roland McGrath <roland@redhat.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Tom Zanussi <tzanussi@gmail.com>
Cc: Vegard Nossum <vegard.nossum@gmail.com>
LKML-Reference: <20090813203501.31965.30172.stgit@localhost.localdomain>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>

kernel/trace/trace_event_types.h

@@ -109,7 +109,7 @@ TRACE_EVENT_FORMAT(bprint, TRACE_BPRINT, bprint_entry, ignore,
 	TRACE_STRUCT(
 		TRACE_FIELD(unsigned long, ip, ip)
 		TRACE_FIELD(char *, fmt, fmt)
-		TRACE_FIELD_ZERO_CHAR(buf)
+		TRACE_FIELD_ZERO(char, buf)
 	),
 	TP_RAW_FMT("%08lx (%d) fmt:%p %s")
 );
@@ -117,7 +117,7 @@ TRACE_EVENT_FORMAT(bprint, TRACE_BPRINT, bprint_entry, ignore,
 TRACE_EVENT_FORMAT(print, TRACE_PRINT, print_entry, ignore,
 	TRACE_STRUCT(
 		TRACE_FIELD(unsigned long, ip, ip)
-		TRACE_FIELD_ZERO_CHAR(buf)
+		TRACE_FIELD_ZERO(char, buf)
 	),
 	TP_RAW_FMT("%08lx (%d) fmt:%p %s")
 );

kernel/trace/trace_export.c

@@ -42,9 +42,9 @@ extern void __bad_type_size(void);
 	if (!ret)							\
 		return 0;
 
-#undef TRACE_FIELD_ZERO_CHAR
-#define TRACE_FIELD_ZERO_CHAR(item)					\
-	ret = trace_seq_printf(s, "\tfield:char " #item ";\t"		\
+#undef TRACE_FIELD_ZERO
+#define TRACE_FIELD_ZERO(type, item)					\
+	ret = trace_seq_printf(s, "\tfield:" #type " " #item ";\t"	\
 			       "offset:%u;\tsize:0;\n",			\
 			       (unsigned int)offsetof(typeof(field), item)); \
 	if (!ret)							\
@@ -92,9 +92,6 @@ ftrace_format_##call(struct ftrace_event_call *unused,			\
 
 #include "trace_event_types.h"
 
-#undef TRACE_ZERO_CHAR
-#define TRACE_ZERO_CHAR(arg)
-
 #undef TRACE_FIELD
 #define TRACE_FIELD(type, item, assign)\
 	entry->item = assign;
@@ -107,6 +104,9 @@ ftrace_format_##call(struct ftrace_event_call *unused,			\
 #define TRACE_FIELD_SIGN(type, item, assign, is_signed)	\
 	TRACE_FIELD(type, item, assign)
 
+#undef TRACE_FIELD_ZERO
+#define TRACE_FIELD_ZERO(type, item)
+
 #undef TP_CMD
 #define TP_CMD(cmd...)	cmd
 
@@ -180,8 +180,8 @@ __attribute__((section("_ftrace_events"))) event_##call = {		\
 	if (ret)							\
 		return ret;
 
-#undef TRACE_FIELD_ZERO_CHAR
-#define TRACE_FIELD_ZERO_CHAR(item)
+#undef TRACE_FIELD_ZERO
+#define TRACE_FIELD_ZERO(type, item)
 
 #undef TRACE_EVENT_FORMAT
 #define TRACE_EVENT_FORMAT(call, proto, args, fmt, tstruct, tpfmt)	\