async: make async a command line option for now

... and have it default off.
This does allow people to work with it for testing.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>

1 files changed, 14 insertions, 2 deletions

diff --git a/kernel/async.c b/kernel/async.c
index 64cc916299a5..f286e9f2b736 100644
--- a/kernel/async.c
+++ b/kernel/async.c
@@ -65,6 +65,8 @@ static LIST_HEAD(async_pending);
 static LIST_HEAD(async_running);
 static DEFINE_SPINLOCK(async_lock);
 
+static int async_enabled = 0;
+
 struct async_entry {
         struct list_head list;
         async_cookie_t   cookie;
@@ -169,7 +171,7 @@ static async_cookie_t __async_schedule(async_func_ptr *ptr, void *data, struct l
          * If we're out of memory or if there's too much work
          * pending already, we execute synchronously.
          */
-        if (!entry || atomic_read(&entry_count) > MAX_WORK) {
+        if (!async_enabled || !entry || atomic_read(&entry_count) > MAX_WORK) {
                 kfree(entry);
                 spin_lock_irqsave(&async_lock, flags);
                 newcookie = next_cookie++;
@@ -316,8 +318,18 @@ static int async_manager_thread(void *unused)
 
 static int __init async_init(void)
 {
-        kthread_run(async_manager_thread, NULL, "async/mgr");
+        if (async_enabled)
+                kthread_run(async_manager_thread, NULL, "async/mgr");
         return 0;
 }
 
+static int __init setup_async(char *str)
+{
+        async_enabled = 1;
+        return 1;
+}
+
+__setup("fastboot", setup_async);
+
+
 core_initcall(async_init);