tracing: Remove boot tracer
The boot tracer is useless. It simply logs the initcalls
but in fact these initcalls are also logged through printk
while using the initcall_debug kernel parameter.
Nobody seem to be using it so far. Then just remove it.
Signed-off-by: WANG Cong <xiyou.wangcong@gmail.com>
Cc: Chase Douglas <chase.douglas@canonical.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Li Zefan <lizf@cn.fujitsu.com>
LKML-Reference: <20100526105753.GA5677@cr0.nay.redhat.com>
[ remove the hooks in main.c, and the headers ]
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
diff --git a/init/main.c b/init/main.c
index 3bdb152..94f65ef 100644
--- a/init/main.c
+++ b/init/main.c
@@ -70,7 +70,6 @@
#include <linux/sfi.h>
#include <linux/shmem_fs.h>
#include <linux/slab.h>
-#include <trace/boot.h>
#include <asm/io.h>
#include <asm/bugs.h>
@@ -715,38 +714,33 @@
core_param(initcall_debug, initcall_debug, bool, 0644);
static char msgbuf[64];
-static struct boot_trace_call call;
-static struct boot_trace_ret ret;
int do_one_initcall(initcall_t fn)
{
int count = preempt_count();
ktime_t calltime, delta, rettime;
+ unsigned long long duration;
+ int ret;
if (initcall_debug) {
- call.caller = task_pid_nr(current);
- printk("calling %pF @ %i\n", fn, call.caller);
+ printk("calling %pF @ %i\n", fn, task_pid_nr(current));
calltime = ktime_get();
- trace_boot_call(&call, fn);
- enable_boot_trace();
}
- ret.result = fn();
+ ret = fn();
if (initcall_debug) {
- disable_boot_trace();
rettime = ktime_get();
delta = ktime_sub(rettime, calltime);
- ret.duration = (unsigned long long) ktime_to_ns(delta) >> 10;
- trace_boot_ret(&ret, fn);
- printk("initcall %pF returned %d after %Ld usecs\n", fn,
- ret.result, ret.duration);
+ duration = (unsigned long long) ktime_to_ns(delta) >> 10;
+ printk("initcall %pF returned %d after %lld usecs\n", fn,
+ ret, duration);
}
msgbuf[0] = 0;
- if (ret.result && ret.result != -ENODEV && initcall_debug)
- sprintf(msgbuf, "error code %d ", ret.result);
+ if (ret && ret != -ENODEV && initcall_debug)
+ sprintf(msgbuf, "error code %d ", ret);
if (preempt_count() != count) {
strlcat(msgbuf, "preemption imbalance ", sizeof(msgbuf));
@@ -760,7 +754,7 @@
printk("initcall %pF returned with %s\n", fn, msgbuf);
}
- return ret.result;
+ return ret;
}
@@ -880,7 +874,6 @@
smp_prepare_cpus(setup_max_cpus);
do_pre_smp_initcalls();
- start_boot_trace();
smp_init();
sched_init_smp();