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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2010-03-03 07:46:56 -0800
committerIngo Molnar <mingo@elte.hu>2010-03-04 11:46:14 +0100
commitdb1466b3e1bd1727375cdbfcbea4bcce2f860f61 (patch)
treee56e8d7b82f8851e570d95f531ec62e4d107967a /include/linux/cred.h
parent0e064caf6402d1d67db4233d26beec88ca212919 (diff)
downloadlinux-db1466b3e1bd1727375cdbfcbea4bcce2f860f61.tar.gz
rcu: Use wrapper function instead of exporting tasklist_lock
Lockdep-RCU commit d11c563d exported tasklist_lock, which is not a good thing. This patch instead exports a function that uses lockdep to check whether tasklist_lock is held. Suggested-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: laijs@cn.fujitsu.com Cc: dipankar@in.ibm.com Cc: mathieu.desnoyers@polymtl.ca Cc: josh@joshtriplett.org Cc: dvhltc@us.ibm.com Cc: niv@us.ibm.com Cc: peterz@infradead.org Cc: rostedt@goodmis.org Cc: Valdis.Kletnieks@vt.edu Cc: dhowells@redhat.com Cc: Christoph Hellwig <hch@lst.de> LKML-Reference: <1267631219-8713-1-git-send-email-paulmck@linux.vnet.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/cred.h')
-rw-r--r--include/linux/cred.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/cred.h b/include/linux/cred.h
index 4db09f89b63..52507c3e138 100644
--- a/include/linux/cred.h
+++ b/include/linux/cred.h
@@ -280,7 +280,7 @@ static inline void put_cred(const struct cred *_cred)
* task or by holding tasklist_lock to prevent it from being unlinked.
*/
#define __task_cred(task) \
- ((const struct cred *)(rcu_dereference_check((task)->real_cred, rcu_read_lock_held() || lockdep_is_held(&tasklist_lock))))
+ ((const struct cred *)(rcu_dereference_check((task)->real_cred, rcu_read_lock_held() || lockdep_tasklist_lock_is_held())))
/**
* get_task_cred - Get another task's objective credentials