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tracing: Remove boot tracer

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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>
This commit is contained in:
Américo Wang 2010-05-26 18:57:53 +08:00 • committed by Frederic Weisbecker
parent b0f82b81fe
commit 30dbb20e68
8 changed files with 10 additions and 318 deletions
Download patch file Download diff file Expand all files Collapse all files

27
init/main.c
View file

@ -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 @@ int initcall_debug;
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 @@ int do_one_initcall(initcall_t fn)
printk("initcall %pF returned with %s\n", fn, msgbuf);
}
return ret.result;
return ret;
}
@ -880,7 +874,6 @@ static int __init kernel_init(void * unused)
smp_prepare_cpus(setup_max_cpus);
do_pre_smp_initcalls();
start_boot_trace();
smp_init();
sched_init_smp();