3.10-stable review patch. If anyone has any objections, please let me know.
------------------
From: Davidlohr Bueso <davidlohr.bu...@hp.com>
commit 1ca7003ab41152d673d9e359632283d05294f3d6 upstream.
Simple helpers around the (kern_ipc_perm *)->lock spinlock.
Signed-off-by: Davidlohr Bueso <davidlohr.bu...@hp.com>
Cc: Andi Kleen <a...@firstfloor.org>
Cc: Rik van Riel <r...@redhat.com>
Signed-off-by: Andrew Morton <a...@linux-foundation.org>
Signed-off-by: Linus Torvalds <torva...@linux-foundation.org>
Cc: Mike Galbraith <efa...@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
ipc/util.h | 20 +++++++++++++++-----
1 file changed, 15 insertions(+), 5 deletions(-)
--- a/ipc/util.h
+++ b/ipc/util.h
@@ -159,23 +159,33 @@ static inline int ipc_checkid(struct ker
return uid / SEQ_MULTIPLIER != ipcp->seq;
}
-static inline void ipc_lock_by_ptr(struct kern_ipc_perm *perm)
+static inline void ipc_lock_object(struct kern_ipc_perm *perm)
{
- rcu_read_lock();
spin_lock(&perm->lock);
}
-static inline void ipc_unlock(struct kern_ipc_perm *perm)
+static inline void ipc_unlock_object(struct kern_ipc_perm *perm)
{
spin_unlock(&perm->lock);
- rcu_read_unlock();
}
-static inline void ipc_lock_object(struct kern_ipc_perm *perm)
+static inline void ipc_assert_locked_object(struct kern_ipc_perm *perm)
{
+ assert_spin_locked(&perm->lock);
+}
+
+static inline void ipc_lock_by_ptr(struct kern_ipc_perm *perm)
+{
+ rcu_read_lock();
spin_lock(&perm->lock);
}
+static inline void ipc_unlock(struct kern_ipc_perm *perm)
+{
+ spin_unlock(&perm->lock);
+ rcu_read_unlock();
+}
+
struct kern_ipc_perm *ipc_lock_check(struct ipc_ids *ids, int id);
struct kern_ipc_perm *ipc_obtain_object_check(struct ipc_ids *ids, int id);
int ipcget(struct ipc_namespace *ns, struct ipc_ids *ids,
--
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