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-rw-r--r--init/main.c46
1 files changed, 26 insertions, 20 deletions
diff --git a/init/main.c b/init/main.c
index 5f2ec2cdd900..e97fadeec856 100644
--- a/init/main.c
+++ b/init/main.c
@@ -65,11 +65,9 @@
#include <linux/ftrace.h>
#include <linux/async.h>
#include <linux/kmemcheck.h>
-#include <linux/kmemtrace.h>
#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>
@@ -124,7 +122,9 @@ static char *ramdisk_execute_command;
#ifdef CONFIG_SMP
/* Setup configured maximum number of CPUs to activate */
-unsigned int __initdata setup_max_cpus = NR_CPUS;
+unsigned int setup_max_cpus = NR_CPUS;
+EXPORT_SYMBOL(setup_max_cpus);
+
/*
* Setup routine for controlling SMP activation
@@ -421,18 +421,26 @@ static void __init setup_command_line(char *command_line)
* gcc-3.4 accidentally inlines this function, so use noinline.
*/
+static __initdata DECLARE_COMPLETION(kthreadd_done);
+
static noinline void __init_refok rest_init(void)
__releases(kernel_lock)
{
int pid;
rcu_scheduler_starting();
+ /*
+ * We need to spawn init first so that it obtains pid 1, however
+ * the init task will end up wanting to create kthreads, which, if
+ * we schedule it before we create kthreadd, will OOPS.
+ */
kernel_thread(kernel_init, NULL, CLONE_FS | CLONE_SIGHAND);
numa_default_policy();
pid = kernel_thread(kthreadd, NULL, CLONE_FS | CLONE_FILES);
rcu_read_lock();
kthreadd_task = find_task_by_pid_ns(pid, &init_pid_ns);
rcu_read_unlock();
+ complete(&kthreadd_done);
unlock_kernel();
/*
@@ -521,6 +529,7 @@ static void __init mm_init(void)
page_cgroup_init_flatmem();
mem_init();
kmem_cache_init();
+ percpu_init_late();
pgtable_cache_init();
vmalloc_init();
}
@@ -652,7 +661,6 @@ asmlinkage void __init start_kernel(void)
#endif
page_cgroup_init();
enable_debug_pagealloc();
- kmemtrace_init();
kmemleak_init();
debug_objects_mem_init();
idr_init_cache();
@@ -714,38 +722,33 @@ 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));
@@ -759,7 +762,7 @@ int do_one_initcall(initcall_t fn)
printk("initcall %pF returned with %s\n", fn, msgbuf);
}
- return ret.result;
+ return ret;
}
@@ -853,6 +856,10 @@ static noinline int init_post(void)
static int __init kernel_init(void * unused)
{
+ /*
+ * Wait until kthreadd is all set-up.
+ */
+ wait_for_completion(&kthreadd_done);
lock_kernel();
/*
@@ -878,7 +885,6 @@ 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();