tracing: Remove show_format and related macros from TRACE_EVENT

The previous patches added the use of print_fmt string and changes
the trace_define_field() function to also create the fields and
format output for the event format files.

   text	   data	    bss	    dec	    hex	filename
5857201	1355780	9336808	16549789	 fc879d	vmlinux
5884589	1351684	9337896	16574169	 fce6d9	vmlinux-orig

The above shows the size of the vmlinux after this patch set
compared to the vmlinux-orig which is before the patch set.

This saves us 27k on text, 1k on bss and adds just 4k of data.

The total savings of 24k in size.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
LKML-Reference: <4B273D4D.40604@cn.fujitsu.com>
Acked-by: Masami Hiramatsu <mhiramat@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

1 files changed, 0 insertions, 12 deletions

diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 250ec865d5f5..c2a3077b7353 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -520,14 +520,6 @@ out:
         return ret;
 }
 
-extern char *__bad_type_size(void);
-
-#undef FIELD
-#define FIELD(type, name)                                               \
-        sizeof(type) != sizeof(field.name) ? __bad_type_size() :        \
-        #type, "common_" #name, offsetof(typeof(field), name),          \
-                sizeof(field.name), is_signed_type(type)
-
 static ssize_t
 event_format_read(struct file *filp, char __user *ubuf, size_t cnt,
                   loff_t *ppos)
@@ -965,10 +957,6 @@ event_create_dir(struct ftrace_event_call *call, struct dentry *d_events,
                                   filter);
         }
 
-        /* A trace may not want to export its format */
-        if (!call->show_format)
-                return 0;
-
         trace_create_file("format", 0444, call->dir, call,
                           format);