[PATCH] slow-work: Fix build bug in the !CONFIG_MODULES case

[Ingo Molnar]

Commit 3bde31a ("SLOW_WORK: Allow a requeueable work item to sleep till
the thread is needed") broke the !CONFIG_MODULES build by relying on
variables that are only available (and only make sense) with module
support enabled. Fix it.

Cc: David Howells <dhowells at redhat.com>
Cc: Linus Torvalds <torvalds at linux-foundation.org>
Cc: Andrew Morton <akpm at linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo at elte.hu>
---
 kernel/slow-work.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/kernel/slow-work.c b/kernel/slow-work.c
index da94f3c..5bae807 100644
--- a/kernel/slow-work.c
+++ b/kernel/slow-work.c
@@ -310,7 +310,9 @@ auto_requeue:
 	else
 		list_add_tail(&work->link, &slow_work_queue);
 	spin_unlock_irq(&slow_work_queue_lock);
+#ifdef CONFIG_MODULES
 	slow_work_thread_processing[id] = NULL;
+#endif
 	return true;
 }
 
@@ -943,6 +945,7 @@ EXPORT_SYMBOL(slow_work_register_user);
  */
 static void slow_work_wait_for_items(struct module *module)
 {
+#ifdef CONFIG_MODULES
 	DECLARE_WAITQUEUE(myself, current);
 	struct slow_work *work;
 	int loop;
@@ -989,6 +992,7 @@ static void slow_work_wait_for_items(struct module *module)
 
 	remove_wait_queue(&slow_work_unreg_wq, &myself);
 	mutex_unlock(&slow_work_unreg_sync_lock);
+#endif
 }
 
 /**