[patch] uninline init_waitqueue_*() functions, fix

Ingo Molnar
2006-07-05T09:59:01Z

Subject: uninline init_waitqueue_*() functions, fix
From: Ingo Molnar <mingo@elte.hu>

fix lockdep on-stack-completion initializer, now that waitqueue_lock_key
is private to kernel/wait.c.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
arch/x86_64/kernel/smpboot.c | 4 +---
include/linux/completion.h | 5 ++++-
2 files changed, 5 insertions(+), 4 deletions(-)

Index: linux/arch/x86_64/kernel/smpboot.c
===================================================================
--- linux.orig/arch/x86_64/kernel/smpboot.c
+++ linux/arch/x86_64/kernel/smpboot.c
@@ -771,12 +771,10 @@ static int __cpuinit do_boot_cpu(int cpu
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))) {
Index: linux/include/linux/completion.h
===================================================================
--- linux.orig/include/linux/completion.h
+++ linux/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