[PATCH] lockdep: clean up completion initializer in smpboot.c

Clean up lockdep on-stack-completion initializer.  (This also removes the
dependency on waitqueue_lock_key.)

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2 files changed, 5 insertions, 4 deletions

diff --git a/arch/x86_64/kernel/smpboot.c b/arch/x86_64/kernel/smpboot.c
index b7c705969791..975380207b46 100644
--- a/arch/x86_64/kernel/smpboot.c
+++ b/arch/x86_64/kernel/smpboot.c
@@ -771,12 +771,10 @@ static int __cpuinit do_boot_cpu(int cpu, int apicid)
         unsigned long start_rip;
         struct create_idle c_idle = {
                 .cpu = cpu,
-                .done = COMPLETION_INITIALIZER(c_idle.done),
+                .done = COMPLETION_INITIALIZER_ONSTACK(c_idle.done),
         };
         DECLARE_WORK(work, do_fork_idle, &c_idle);
 
-        lockdep_set_class(&c_idle.done.wait.lock, &waitqueue_lock_key);
-
         /* allocate memory for gdts of secondary cpus. Hotplug is considered */
         if (!cpu_gdt_descr[cpu].address &&
                 !(cpu_gdt_descr[cpu].address = get_zeroed_page(GFP_KERNEL))) {
diff --git a/include/linux/completion.h b/include/linux/completion.h
index 251c41e3ddd5..268c5a4a2bd4 100644
--- a/include/linux/completion.h
+++ b/include/linux/completion.h
@@ -18,6 +18,9 @@ struct completion {
 #define COMPLETION_INITIALIZER(work) \
         { 0, __WAIT_QUEUE_HEAD_INITIALIZER((work).wait) }
 
+#define COMPLETION_INITIALIZER_ONSTACK(work) \
+        ({ init_completion(&work); work; })
+
 #define DECLARE_COMPLETION(work) \
         struct completion work = COMPLETION_INITIALIZER(work)
 
@@ -28,7 +31,7 @@ struct completion {
  */
 #ifdef CONFIG_LOCKDEP
 # define DECLARE_COMPLETION_ONSTACK(work) \
-        struct completion work = ({ init_completion(&work); work; })
+        struct completion work = COMPLETION_INITIALIZER_ONSTACK(work)
 #else
 # define DECLARE_COMPLETION_ONSTACK(work) DECLARE_COMPLETION(work)
 #endif