diff options
| -rw-r--r-- | include/linux/ftrace.h | 7 | ||||
| -rw-r--r-- | init/main.c | 3 | ||||
| -rw-r--r-- | kernel/trace/trace_boot.c | 14 |
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()]; |