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LU-5614 build: use %kernel_module_package in rpm spec
[fs/lustre-release.git]
/
lustre
/
ldlm
/
l_lock.c
diff --git
a/lustre/ldlm/l_lock.c
b/lustre/ldlm/l_lock.c
index
ce2bdad
..
6f3f859
100644
(file)
--- a/
lustre/ldlm/l_lock.c
+++ b/
lustre/ldlm/l_lock.c
@@
-1,6
+1,4
@@
-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
+/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
@@
-28,6
+26,8
@@
/*
* Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
/*
* Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
+ *
+ * Copyright (c) 2012, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
*/
/*
* This file is part of Lustre, http://www.lustre.org/
@@
-35,46
+35,42
@@
*/
#define DEBUG_SUBSYSTEM S_LDLM
*/
#define DEBUG_SUBSYSTEM S_LDLM
-#ifdef __KERNEL__
#include <libcfs/libcfs.h>
#include <libcfs/libcfs.h>
-#else
-#include <liblustre.h>
-#endif
#include <lustre_dlm.h>
#include <lustre_lib.h>
#include <lustre_dlm.h>
#include <lustre_lib.h>
-/*
- * ldlm locking uses resource to serialize access to locks
+/**
+ * Lock a lock and its resource.
+ *
+ * LDLM locking uses resource to serialize access to locks
* but there is a case when we change resource of lock upon
* but there is a case when we change resource of lock upon
- * enqueue reply.
we rely on that
lock->l_resource = new_res
- *
is atomic
+ * enqueue reply.
We rely on
lock->l_resource = new_res
+ *
being an atomic operation.
*/
*/
-struct ldlm_resource *
lock_res_and_lock(struct ldlm_lock *lock)
+struct ldlm_resource *lock_res_and_lock(struct ldlm_lock *lock)
{
{
- struct ldlm_resource *res = NULL;
-
- cfs_spin_lock(&lock->l_lock);
- res = lock->l_resource;
+ /* on server-side resource of lock doesn't change */
+ if (!ldlm_is_ns_srv(lock))
+ spin_lock(&lock->l_lock);
- if (ns_is_server(res->lr_namespace))
- /* on server-side resource of lock doesn't change */
- cfs_spin_unlock(&lock->l_lock);
+ lock_res(lock->l_resource);
-
lock_res(res
);
-
return res
;
+
ldlm_set_res_locked(lock
);
+
return lock->l_resource
;
}
}
+EXPORT_SYMBOL(lock_res_and_lock);
+/**
+ * Unlock a lock and its resource previously locked with lock_res_and_lock
+ */
void unlock_res_and_lock(struct ldlm_lock *lock)
{
void unlock_res_and_lock(struct ldlm_lock *lock)
{
- struct ldlm_resource *res = lock->l_resource;
-
- if (ns_is_server(res->lr_namespace)) {
- /* on server-side resource of lock doesn't change */
- unlock_res(res);
- return;
- }
+ /* on server-side resource of lock doesn't change */
+ ldlm_clear_res_locked(lock);
- unlock_res(res);
- cfs_spin_unlock(&lock->l_lock);
+ unlock_res(lock->l_resource);
+ if (!ldlm_is_ns_srv(lock))
+ spin_unlock(&lock->l_lock);
}
}
+EXPORT_SYMBOL(unlock_res_and_lock);