From 30dbb20e68e6f7df974b77d2350ebad5eb6f6c9e Mon Sep 17 00:00:00 2001 From: Américo Wang Date: Wed, 26 May 2010 18:57:53 +0800 Subject: 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 Cc: Chase Douglas Cc: Steven Rostedt Cc: Ingo Molnar Cc: Peter Zijlstra Cc: Li Zefan LKML-Reference: <20100526105753.GA5677@cr0.nay.redhat.com> [ remove the hooks in main.c, and the headers ] Signed-off-by: Frederic Weisbecker --- init/main.c | 27 ++++++++++----------------- 1 file changed, 10 insertions(+), 17 deletions(-) (limited to 'init/main.c') diff --git a/init/main.c b/init/main.c index 3bdb152f412f..94f65efdc65a 100644 --- a/init/main.c +++ b/init/main.c @@ -70,7 +70,6 @@ #include #include #include -#include #include #include @@ -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(); -- cgit v1.2.3