LU-1347 ldlm: makes EXPORT_SYMBOL follows function body

[fs/lustre-release.git] / lustre / ldlm / ldlm_extent.c

diff --git a/lustre/ldlm/ldlm_extent.c b/lustre/ldlm/ldlm_extent.c
index fe730f5..2ddf2f7 100644 (file)
--- a/lustre/ldlm/ldlm_extent.c
+++ b/lustre/ldlm/ldlm_extent.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.
@@ -29,8 +27,7 @@
  * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
  *
- * Copyright (c) 2011 Whamcloud, Inc.
- *
+ * Copyright (c) 2011, 2012, Whamcloud, Inc.
  */
 /*
  * This file is part of Lustre, http://www.lustre.org/
@@ -57,7 +54,8 @@
 
 #include "ldlm_internal.h"
 
-#define LDLM_MAX_GROWN_EXTENT (32 * 1024 * 1024 - 1)
+#ifdef HAVE_SERVER_SUPPORT
+# define LDLM_MAX_GROWN_EXTENT (32 * 1024 * 1024 - 1)
 
 /* fixup the ldlm_extent after expanding */
 static void ldlm_extent_internal_policy_fixup(struct ldlm_lock *req,
@@ -81,11 +79,12 @@ static void ldlm_extent_internal_policy_fixup(struct ldlm_lock *req,
         }
 
         /* we need to ensure that the lock extent is properly aligned to what
-         * the client requested.  We align it to the lowest-common denominator
-         * of the clients requested lock start and end alignment. */
-        mask = 0x1000ULL;
+         * the client requested. Also we need to make sure it's also server
+         * page size aligned otherwise a server page can be covered by two
+         * write locks. */
+        mask = CFS_PAGE_SIZE;
         req_align = (req_end + 1) | req_start;
-        if (req_align != 0) {
+        if (req_align != 0 && (req_align & (mask - 1)) == 0) {
                 while ((req_align & mask) == 0)
                         mask <<= 1;
         }
@@ -761,6 +760,7 @@ out:
         }
         RETURN(rc);
 }
+#endif /* HAVE_SERVER_SUPPORT */
 
 /* When a lock is cancelled by a client, the KMS may undergo change if this
  * is the "highest lock".  This function returns the new KMS value.
@@ -798,6 +798,7 @@ __u64 ldlm_extent_shift_kms(struct ldlm_lock *lock, __u64 old_kms)
 
         RETURN(kms);
 }
+EXPORT_SYMBOL(ldlm_extent_shift_kms);
 
 cfs_mem_cache_t *ldlm_interval_slab;
 struct ldlm_interval *ldlm_interval_alloc(struct ldlm_lock *lock)