summaryrefslogtreecommitdiff
path: root/init
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2010-07-02 09:52:58 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-07-02 09:52:58 -0700
commit123f94f22e3d283dfe68742b269c245b0501ad82 (patch)
tree1d40043b0909f309cf77204ea87be9e61f143e79 /init
parent4b78c119f0ba715b4e29b190bf4d7bce810ea0d6 (diff)
parent8c215bd3890c347dfb6a2db4779755f8b9c298a9 (diff)
downloadkernel-123f94f22e3d283dfe68742b269c245b0501ad82.tar.gz
Merge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: sched: Cure nr_iowait_cpu() users init: Fix comment init, sched: Fix race between init and kthreadd
Diffstat (limited to 'init')
-rw-r--r--init/main.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/init/main.c b/init/main.c
index ac2e4a5f59ee..a42fdf4aeba9 100644
--- a/init/main.c
+++ b/init/main.c
@@ -424,18 +424,26 @@ 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();
/*
@@ -857,6 +865,10 @@ 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();
/*