Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=d725fdc8027a4cd961f58d92917fbb91b171abfa
Commit: d725fdc8027a4cd961f58d92917fbb91b171abfa
Parent: b5890d8ba47741425fe3c0d753e1b57bc0561b7b
Author: Oleg Nesterov <[EMAIL PROTECTED]>
AuthorDate: Fri Aug 10 15:21:17 2007 -0700
Committer: David S. Miller <[EMAIL PROTECTED]>
CommitDate: Mon Aug 13 22:52:09 2007 -0700
[DCCP]: fix theoretical ccids_{read,write}_lock() race
Make sure that spin_unlock_wait() is properly ordered wrt atomic_inc().
(akpm: can't we convert this code to use rwlocks?)
Signed-off-by: Oleg Nesterov <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: David S. Miller <[EMAIL PROTECTED]>
---
net/dccp/ccid.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/net/dccp/ccid.c b/net/dccp/ccid.c
index ccbf72c..c45088b 100644
--- a/net/dccp/ccid.c
+++ b/net/dccp/ccid.c
@@ -40,6 +40,7 @@ static inline void ccids_write_unlock(void)
static inline void ccids_read_lock(void)
{
atomic_inc(&ccids_lockct);
+ smp_mb__after_atomic_inc();
spin_unlock_wait(&ccids_lock);
}
-
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