Merge commit 'v2.6.28' into core/core

[karo-tx-linux.git] / net / unix / garbage.c

diff --git a/net/unix/garbage.c b/net/unix/garbage.c
index 6d4a9a8de5ef1d8974a4f8fe17956dfd31b63fe6..abb3ab34cb1ece8f357819c8124430996e15d443 100644 (file)
--- a/net/unix/garbage.c
+++ b/net/unix/garbage.c
@@ -80,6 +80,7 @@
 #include <linux/file.h>
 #include <linux/proc_fs.h>
 #include <linux/mutex.h>
+#include <linux/wait.h>
 
 #include <net/sock.h>
 #include <net/af_unix.h>
@@ -91,6 +92,7 @@
 static LIST_HEAD(gc_inflight_list);
 static LIST_HEAD(gc_candidates);
 static DEFINE_SPINLOCK(unix_gc_lock);
+static DECLARE_WAIT_QUEUE_HEAD(unix_gc_wait);
 
 unsigned int unix_tot_inflight;
 
@@ -266,12 +268,16 @@ static void inc_inflight_move_tail(struct unix_sock *u)
                list_move_tail(&u->link, &gc_candidates);
 }
 
-/* The external entry point: unix_gc() */
+static bool gc_in_progress = false;
 
-void unix_gc(void)
+void wait_for_unix_gc(void)
 {
-       static bool gc_in_progress = false;
+       wait_event(unix_gc_wait, gc_in_progress == false);
+}
 
+/* The external entry point: unix_gc() */
+void unix_gc(void)
+{
        struct unix_sock *u;
        struct unix_sock *next;
        struct sk_buff_head hitlist;
@@ -376,6 +382,7 @@ void unix_gc(void)
        /* All candidates should have been detached by now. */
        BUG_ON(!list_empty(&gc_candidates));
        gc_in_progress = false;
+       wake_up(&unix_gc_wait);
 
  out:
        spin_unlock(&unix_gc_lock);