tracing: Fix ftrace stack trace entries

BugLink: http://bugs.launchpad.net/bugs/983326

commit 01de982abf8c9e10fc3089e10585cd2cc914bdab upstream.

8 hex characters tell only half the tale for 64 bit CPUs,
so use the appropriate length.

Link: http://lkml.kernel.org/r/1332411501-8059-2-git-send-email-wolfgang.mauerer@siemens.com

Signed-off-by: Wolfgang Mauerer <wolfgang.mauerer@siemens.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>

2 files changed, 13 insertions, 5 deletions

diff --git a/kernel/trace/trace_entries.h b/kernel/trace/trace_entries.h
index e32744c84d9..1fe81eef1ce 100644
--- a/kernel/trace/trace_entries.h
+++ b/kernel/trace/trace_entries.h
@@ -156,6 +156,12 @@ FTRACE_ENTRY_DUP(wakeup, ctx_switch_entry,
 
 #define FTRACE_STACK_ENTRIES    8
 
+#ifndef CONFIG_64BIT
+# define IP_FMT "%08lx"
+#else
+# define IP_FMT "%016lx"
+#endif
+
 FTRACE_ENTRY(kernel_stack, stack_entry,
 
         TRACE_STACK,
@@ -164,8 +170,9 @@ FTRACE_ENTRY(kernel_stack, stack_entry,
                 __array(        unsigned long,  caller, FTRACE_STACK_ENTRIES    )
         ),
 
-        F_printk("\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n"
-                 "\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n",
+        F_printk("\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n"
+                 "\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n"
+                 "\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n",
                  __entry->caller[0], __entry->caller[1], __entry->caller[2],
                  __entry->caller[3], __entry->caller[4], __entry->caller[5],
                  __entry->caller[6], __entry->caller[7])
@@ -180,8 +187,9 @@ FTRACE_ENTRY(user_stack, userstack_entry,
                 __array(        unsigned long,  caller, FTRACE_STACK_ENTRIES    )
         ),
 
-        F_printk("\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n"
-                 "\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n",
+        F_printk("\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n"
+                 "\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n"
+                 "\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n",
                  __entry->caller[0], __entry->caller[1], __entry->caller[2],
                  __entry->caller[3], __entry->caller[4], __entry->caller[5],
                  __entry->caller[6], __entry->caller[7])
diff --git a/kernel/trace/trace_export.c b/kernel/trace/trace_export.c
index bbeec31e0ae..ad4000c71be 100644
--- a/kernel/trace/trace_export.c
+++ b/kernel/trace/trace_export.c
@@ -150,7 +150,7 @@ ftrace_define_fields_##name(struct ftrace_event_call *event_call)	\
 #define __dynamic_array(type, item)
 
 #undef F_printk
-#define F_printk(fmt, args...) #fmt ", "  __stringify(args)
+#define F_printk(fmt, args...) __stringify(fmt) ", "  __stringify(args)
 
 #undef FTRACE_ENTRY
 #define FTRACE_ENTRY(call, struct_name, etype, tstruct, print)          \