From 33b04b9308959af7febc1c111c766fa3fd8b1934 Mon Sep 17 00:00:00 2001
From: Arjan van de Ven <arjan@linux.intel.com>
Date: Thu, 8 Jan 2009 12:35:11 -0800
Subject: [PATCH] async: make async_synchronize_full() more serializing
turns out that there are real problems with allowing async
tasks that are scheduled from async tasks to run after
the async_synchronize_full() returns.
This patch makes the _full more strict and a complete
synchronization. Later I might need to add back a lighter
form of synchronization for other uses.. but not right now.
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
kernel/async.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/kernel/async.c b/kernel/async.c
index 97373380c9e7..64cc916299a5 100644
--- a/kernel/async.c
+++ b/kernel/async.c
@@ -206,7 +206,9 @@ EXPORT_SYMBOL_GPL(async_schedule_special);
void async_synchronize_full(void)
{
- async_synchronize_cookie(next_cookie);
+ do {
+ async_synchronize_cookie(next_cookie);
+ } while (!list_empty(&async_running) || !list_empty(&async_pending));
}
EXPORT_SYMBOL_GPL(async_synchronize_full);
--
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