Merge branch 'master' of /home/shaggy/git/linus-clean/

1 files changed, 30 insertions, 7 deletions

diff --git a/kernel/async.c b/kernel/async.c
index 64cc916299a5..608b32b42812 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;
@@ -88,12 +90,12 @@ extern int initcall_debug;
 static async_cookie_t  __lowest_in_progress(struct list_head *running)
 {
         struct async_entry *entry;
-        if (!list_empty(&async_pending)) {
-                entry = list_first_entry(&async_pending,
+        if (!list_empty(running)) {
+                entry = list_first_entry(running,
                         struct async_entry, list);
                 return entry->cookie;
-        } else if (!list_empty(running)) {
-                entry = list_first_entry(running,
+        } else if (!list_empty(&async_pending)) {
+                entry = list_first_entry(&async_pending,
                         struct async_entry, list);
                 return entry->cookie;
         } else {
@@ -102,6 +104,17 @@ static async_cookie_t  __lowest_in_progress(struct list_head *running)
         }
 
 }
+
+static async_cookie_t  lowest_in_progress(struct list_head *running)
+{
+        unsigned long flags;
+        async_cookie_t ret;
+
+        spin_lock_irqsave(&async_lock, flags);
+        ret = __lowest_in_progress(running);
+        spin_unlock_irqrestore(&async_lock, flags);
+        return ret;
+}
 /*
  * pick the first pending entry and run it
  */
@@ -169,7 +182,7 @@ 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++;
@@ -227,7 +240,7 @@ void async_synchronize_cookie_special(async_cookie_t cookie, struct list_head *r
                 starttime = ktime_get();
         }
 
-        wait_event(async_done, __lowest_in_progress(running) >= cookie);
+        wait_event(async_done, lowest_in_progress(running) >= cookie);
 
         if (initcall_debug && system_state == SYSTEM_BOOTING) {
                 endtime = ktime_get();
@@ -316,8 +329,18 @@ 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);