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-rw-r--r--include/linux/ftrace.h7
-rw-r--r--init/main.c3
-rw-r--r--kernel/trace/trace_boot.c14
3 files changed, 15 insertions, 9 deletions
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index 4455490d91bd..e672e51c40a9 100644
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -7,6 +7,7 @@
#include <linux/fs.h>
#include <linux/init.h>
#include <linux/types.h>
+#include <linux/kallsyms.h>
extern int ftrace_enabled;
extern int
@@ -213,7 +214,7 @@ ftrace_init_module(unsigned long *start, unsigned long *end) { }
struct boot_trace {
pid_t caller;
- initcall_t func;
+ char func[KSYM_NAME_LEN];
int result;
unsigned long long duration;
ktime_t calltime;
@@ -221,10 +222,10 @@ struct boot_trace {
};
#ifdef CONFIG_BOOT_TRACER
-extern void trace_boot(struct boot_trace *it);
+extern void trace_boot(struct boot_trace *it, initcall_t fn);
extern void start_boot_trace(void);
#else
-static inline void trace_boot(struct boot_trace *it) { }
+static inline void trace_boot(struct boot_trace *it, initcall_t fn) { }
static inline void start_boot_trace(void) { }
#endif
diff --git a/init/main.c b/init/main.c
index 61eb66159391..8e96a0ef17f4 100644
--- a/init/main.c
+++ b/init/main.c
@@ -712,7 +712,6 @@ int do_one_initcall(initcall_t fn)
if (initcall_debug) {
it.caller = task_pid_nr(current);
- it.func = fn;
printk("calling %pF @ %i\n", fn, it.caller);
it.calltime = ktime_get();
}
@@ -725,7 +724,7 @@ int do_one_initcall(initcall_t fn)
it.duration = (unsigned long long) delta.tv64 >> 20;
printk("initcall %pF returned %d after %Ld msecs\n", fn,
it.result, it.duration);
- trace_boot(&it);
+ trace_boot(&it, fn);
}
msgbuf[0] = 0;
diff --git a/kernel/trace/trace_boot.c b/kernel/trace/trace_boot.c
index 7c15f3e68ba3..b9dc2c0093ab 100644
--- a/kernel/trace/trace_boot.c
+++ b/kernel/trace/trace_boot.c
@@ -8,6 +8,7 @@
#include <linux/init.h>
#include <linux/debugfs.h>
#include <linux/ftrace.h>
+#include <linux/kallsyms.h>
#include "trace.h"
@@ -56,17 +57,19 @@ static enum print_line_t initcall_print_line(struct trace_iterator *iter)
struct timespec rettime = ktime_to_timespec(it->rettime);
if (entry->type == TRACE_BOOT) {
- ret = trace_seq_printf(s, "[%5ld.%06ld] calling %pF @ %i\n",
+ ret = trace_seq_printf(s, "[%5ld.%06ld] calling %s @ %i\n",
calltime.tv_sec,
calltime.tv_nsec,
it->func, it->caller);
if (!ret)
return TRACE_TYPE_PARTIAL_LINE;
- ret = trace_seq_printf(s, "[%5ld.%06ld] initcall %pF "
+
+ ret = trace_seq_printf(s, "[%5ld.%06ld] initcall %s "
"returned %d after %lld msecs\n",
rettime.tv_sec,
rettime.tv_nsec,
it->func, it->result, it->duration);
+
if (!ret)
return TRACE_TYPE_PARTIAL_LINE;
return TRACE_TYPE_HANDLED;
@@ -83,8 +86,7 @@ struct tracer boot_tracer __read_mostly =
.print_line = initcall_print_line,
};
-
-void trace_boot(struct boot_trace *it)
+void trace_boot(struct boot_trace *it, initcall_t fn)
{
struct ring_buffer_event *event;
struct trace_boot *entry;
@@ -95,6 +97,10 @@ void trace_boot(struct boot_trace *it)
if (!trace_boot_enabled)
return;
+ /* Get its name now since this function could
+ * disappear because it is in the .init section.
+ */
+ sprint_symbol(it->func, (unsigned long)fn);
preempt_disable();
data = tr->data[smp_processor_id()];