diff --git a/fs/dlm/ast.c b/fs/dlm/ast.c
index 2bd1c5e..57bdf09 100644
--- a/fs/dlm/ast.c
+++ b/fs/dlm/ast.c
@@ -21,7 +21,7 @@
 static spinlock_t		ast_queue_lock;
 static struct task_struct *	astd_task;
 static unsigned long		astd_wakeflags;
-static struct semaphore		astd_running;
+static struct mutex		astd_running;
 
 
 void dlm_del_ast(struct dlm_lkb *lkb)
@@ -56,7 +56,7 @@
 	int type = 0, found, bmode;
 
 	for (;;) {
-		found = FALSE;
+		found = 0;
 		spin_lock(&ast_queue_lock);
 		list_for_each_entry(lkb, &ast_queue, lkb_astqueue) {
 			r = lkb->lkb_resource;
@@ -68,7 +68,7 @@
 			list_del(&lkb->lkb_astqueue);
 			type = lkb->lkb_ast_type;
 			lkb->lkb_ast_type = 0;
-			found = TRUE;
+			found = 1;
 			break;
 		}
 		spin_unlock(&ast_queue_lock);
@@ -117,10 +117,10 @@
 			schedule();
 		set_current_state(TASK_RUNNING);
 
-		down(&astd_running);
+		mutex_lock(&astd_running);
 		if (test_and_clear_bit(WAKE_ASTS, &astd_wakeflags))
 			process_asts();
-		up(&astd_running);
+		mutex_unlock(&astd_running);
 	}
 	return 0;
 }
@@ -140,7 +140,7 @@
 
 	INIT_LIST_HEAD(&ast_queue);
 	spin_lock_init(&ast_queue_lock);
-	init_MUTEX(&astd_running);
+	mutex_init(&astd_running);
 
 	p = kthread_run(dlm_astd, NULL, "dlm_astd");
 	if (IS_ERR(p))
@@ -157,11 +157,11 @@
 
 void dlm_astd_suspend(void)
 {
-	down(&astd_running);
+	mutex_lock(&astd_running);
 }
 
 void dlm_astd_resume(void)
 {
-	up(&astd_running);
+	mutex_unlock(&astd_running);
 }
 
diff --git a/fs/dlm/config.c b/fs/dlm/config.c
index 024ace9..87df9616 100644
--- a/fs/dlm/config.c
+++ b/fs/dlm/config.c
@@ -162,7 +162,7 @@
 struct space {
 	struct config_group group;
 	struct list_head members;
-	struct semaphore members_lock;
+	struct mutex members_lock;
 	int members_count;
 };
 
@@ -374,7 +374,7 @@
 	sp->group.default_groups[1] = NULL;
 
 	INIT_LIST_HEAD(&sp->members);
-	init_MUTEX(&sp->members_lock);
+	mutex_init(&sp->members_lock);
 	sp->members_count = 0;
 	return &sp->group;
 
@@ -453,10 +453,10 @@
 	nd->nodeid = -1;
 	nd->weight = 1;  /* default weight of 1 if none is set */
 
-	down(&sp->members_lock);
+	mutex_lock(&sp->members_lock);
 	list_add(&nd->list, &sp->members);
 	sp->members_count++;
-	up(&sp->members_lock);
+	mutex_unlock(&sp->members_lock);
 
 	return &nd->item;
 }
@@ -466,10 +466,10 @@
 	struct space *sp = to_space(g->cg_item.ci_parent);
 	struct node *nd = to_node(i);
 
-	down(&sp->members_lock);
+	mutex_lock(&sp->members_lock);
 	list_del(&nd->list);
 	sp->members_count--;
-	up(&sp->members_lock);
+	mutex_unlock(&sp->members_lock);
 
 	config_item_put(i);
 }
@@ -677,7 +677,7 @@
 	if (!sp)
 		return -EEXIST;
 
-	down(&sp->members_lock);
+	mutex_lock(&sp->members_lock);
 	if (!sp->members_count) {
 		rv = 0;
 		goto out;
@@ -698,7 +698,7 @@
 
 	*ids_out = ids;
  out:
-	up(&sp->members_lock);
+	mutex_unlock(&sp->members_lock);
 	put_space(sp);
 	return rv;
 }
@@ -713,14 +713,14 @@
 	if (!sp)
 		goto out;
 
-	down(&sp->members_lock);
+	mutex_lock(&sp->members_lock);
 	list_for_each_entry(nd, &sp->members, list) {
 		if (nd->nodeid != nodeid)
 			continue;
 		w = nd->weight;
 		break;
 	}
-	up(&sp->members_lock);
+	mutex_unlock(&sp->members_lock);
 	put_space(sp);
  out:
 	return w;
diff --git a/fs/dlm/debug_fs.c b/fs/dlm/debug_fs.c
index 98b49a1..5080bbf 100644
--- a/fs/dlm/debug_fs.c
+++ b/fs/dlm/debug_fs.c
@@ -63,12 +63,12 @@
 		/* FIXME: this warns on Alpha */
 		if (lkb->lkb_status == DLM_LKSTS_CONVERT
 		    || lkb->lkb_status == DLM_LKSTS_GRANTED)
-			seq_printf(s, " %" PRIx64 "-%" PRIx64,
+			seq_printf(s, " %llx-%llx",
 				   lkb->lkb_range[GR_RANGE_START],
 				   lkb->lkb_range[GR_RANGE_END]);
 		if (lkb->lkb_status == DLM_LKSTS_CONVERT
 		    || lkb->lkb_status == DLM_LKSTS_WAITING)
-			seq_printf(s, " (%" PRIx64 "-%" PRIx64 ")",
+			seq_printf(s, " (%llx-%llx)",
 				   lkb->lkb_range[RQ_RANGE_START],
 				   lkb->lkb_range[RQ_RANGE_END]);
 	}
diff --git a/fs/dlm/device.c b/fs/dlm/device.c
index a8bf600..899d4f9 100644
--- a/fs/dlm/device.c
+++ b/fs/dlm/device.c
@@ -43,7 +43,7 @@
 static struct file_operations _dlm_fops;
 static const char *name_prefix="dlm";
 static struct list_head user_ls_list;
-static struct semaphore user_ls_lock;
+static struct mutex user_ls_lock;
 
 /* Lock infos are stored in here indexed by lock ID */
 static DEFINE_IDR(lockinfo_idr);
@@ -53,6 +53,7 @@
 #define LI_FLAG_COMPLETE   1
 #define LI_FLAG_FIRSTLOCK  2
 #define LI_FLAG_PERSISTENT 3
+#define LI_FLAG_ONLIST     4
 
 /* flags in ls_flags*/
 #define LS_FLAG_DELETED   1
@@ -211,18 +212,18 @@
 {
 	struct user_ls *lsinfo;
 
-	down(&user_ls_lock);
+	mutex_lock(&user_ls_lock);
 	lsinfo = __find_lockspace(minor);
-	up(&user_ls_lock);
+	mutex_unlock(&user_ls_lock);
 
 	return lsinfo;
 }
 
 static void add_lockspace_to_list(struct user_ls *lsinfo)
 {
-	down(&user_ls_lock);
+	mutex_lock(&user_ls_lock);
 	list_add(&lsinfo->ls_list, &user_ls_list);
-	up(&user_ls_lock);
+	mutex_unlock(&user_ls_lock);
 }
 
 /* Register a lockspace with the DLM and create a misc
@@ -235,12 +236,11 @@
 
 	namelen = strlen(name)+strlen(name_prefix)+2;
 
-	newls = kmalloc(sizeof(struct user_ls), GFP_KERNEL);
+	newls = kzalloc(sizeof(struct user_ls), GFP_KERNEL);
 	if (!newls)
 		return -ENOMEM;
-	memset(newls, 0, sizeof(struct user_ls));
 
-	newls->ls_miscinfo.name = kmalloc(namelen, GFP_KERNEL);
+	newls->ls_miscinfo.name = kzalloc(namelen, GFP_KERNEL);
 	if (!newls->ls_miscinfo.name) {
 		kfree(newls);
 		return -ENOMEM;
@@ -277,7 +277,7 @@
 	return 0;
 }
 
-/* Called with the user_ls_lock semaphore held */
+/* Called with the user_ls_lock mutex held */
 static int unregister_lockspace(struct user_ls *lsinfo, int force)
 {
 	int status;
@@ -305,11 +305,10 @@
 static void add_to_astqueue(struct lock_info *li, void *astaddr, void *astparam,
 			    int lvb_updated)
 {
-	struct ast_info *ast = kmalloc(sizeof(struct ast_info), GFP_KERNEL);
+	struct ast_info *ast = kzalloc(sizeof(struct ast_info), GFP_KERNEL);
 	if (!ast)
 		return;
 
-	memset(ast, 0, sizeof(*ast));
 	ast->result.user_astparam = astparam;
 	ast->result.user_astaddr  = astaddr;
 	ast->result.user_lksb     = li->li_user_lksb;
@@ -382,6 +381,7 @@
 
 			spin_lock(&li->li_file->fi_li_lock);
 			list_del(&li->li_ownerqueue);
+			clear_bit(LI_FLAG_ONLIST, &li->li_flags);
 			spin_unlock(&li->li_file->fi_li_lock);
 			release_lockinfo(li);
 			return;
@@ -437,7 +437,7 @@
 	if (!lsinfo)
 		return -ENOENT;
 
-	f = kmalloc(sizeof(struct file_info), GFP_KERNEL);
+	f = kzalloc(sizeof(struct file_info), GFP_KERNEL);
 	if (!f)
 		return -ENOMEM;
 
@@ -570,7 +570,7 @@
 	 * then free the struct. If it's an AUTOFREE lockspace
 	 * then free the whole thing.
 	 */
-	down(&user_ls_lock);
+	mutex_lock(&user_ls_lock);
 	if (atomic_dec_and_test(&lsinfo->ls_refcnt)) {
 
 		if (lsinfo->ls_lockspace) {
@@ -582,7 +582,7 @@
 			kfree(lsinfo);
 		}
 	}
-	up(&user_ls_lock);
+	mutex_unlock(&user_ls_lock);
 	put_file_info(f);
 
 	/* Restore signals */
@@ -620,10 +620,10 @@
 	if (!capable(CAP_SYS_ADMIN))
 		return -EPERM;
 
-	down(&user_ls_lock);
+	mutex_lock(&user_ls_lock);
 	lsinfo = __find_lockspace(kparams->minor);
 	if (!lsinfo) {
-		up(&user_ls_lock);
+		mutex_unlock(&user_ls_lock);
 		return -EINVAL;
 	}
 
@@ -631,7 +631,7 @@
 		force = 2;
 
 	status = unregister_lockspace(lsinfo, force);
-	up(&user_ls_lock);
+	mutex_unlock(&user_ls_lock);
 
 	return status;
 }
@@ -752,7 +752,7 @@
 	if (!try_module_get(THIS_MODULE))
 		return NULL;
 
-	li = kmalloc(sizeof(struct lock_info), GFP_KERNEL);
+	li = kzalloc(sizeof(struct lock_info), GFP_KERNEL);
 	if (li) {
 		li->li_magic     = LOCKINFO_MAGIC;
 		li->li_file      = fi;
@@ -800,8 +800,10 @@
 
 		/* If this is a persistent lock we will have to create a
 		   lockinfo again */
-		if (!li && DLM_LKF_PERSISTENT) {
+		if (!li && (kparams->flags & DLM_LKF_PERSISTENT)) {
 			li = allocate_lockinfo(fi, cmd, kparams);
+			if (!li)
+				return -ENOMEM;
 
 			li->li_lksb.sb_lkid = kparams->lkid;
 			li->li_castaddr  = kparams->castaddr;
@@ -887,6 +889,7 @@
 
 		spin_lock(&fi->fi_li_lock);
 		list_add(&li->li_ownerqueue, &fi->fi_li_list);
+		set_bit(LI_FLAG_ONLIST, &li->li_flags);
 		spin_unlock(&fi->fi_li_lock);
 		if (add_lockinfo(li))
 			printk(KERN_WARNING "Add lockinfo failed\n");
@@ -914,12 +917,13 @@
 	li = get_lockinfo(kparams->lkid);
 	if (!li) {
 		li = allocate_lockinfo(fi, cmd, kparams);
+		if (!li)
+			return -ENOMEM;
 		spin_lock(&fi->fi_li_lock);
 		list_add(&li->li_ownerqueue, &fi->fi_li_list);
+		set_bit(LI_FLAG_ONLIST, &li->li_flags);
 		spin_unlock(&fi->fi_li_lock);
 	}
- 	if (!li)
-		return -ENOMEM;
 
 	if (li->li_magic != LOCKINFO_MAGIC)
 		return -EINVAL;
@@ -932,6 +936,12 @@
 	if (kparams->flags & DLM_LKF_CANCEL && li->li_grmode != -1)
 		convert_cancel = 1;
 
+	/* Wait until dlm_lock() has completed */
+	if (!test_bit(LI_FLAG_ONLIST, &li->li_flags)) {
+		down(&li->li_firstlock);
+		up(&li->li_firstlock);
+	}
+
 	/* dlm_unlock() passes a 0 for castaddr which means don't overwrite
 	   the existing li_castaddr as that's the completion routine for
 	   unlocks. dlm_unlock_wait() specifies a new AST routine to be
@@ -947,6 +957,7 @@
 	if (!status && !convert_cancel) {
 		spin_lock(&fi->fi_li_lock);
 		list_del(&li->li_ownerqueue);
+		clear_bit(LI_FLAG_ONLIST, &li->li_flags);
 		spin_unlock(&fi->fi_li_lock);
 	}
 
@@ -1055,7 +1066,7 @@
 	int r;
 
 	INIT_LIST_HEAD(&user_ls_list);
-	init_MUTEX(&user_ls_lock);
+	mutex_init(&user_ls_lock);
 	rwlock_init(&lockinfo_lock);
 
 	ctl_device.name = "dlm-control";
diff --git a/fs/dlm/dir.c b/fs/dlm/dir.c
index 0f1dde5..4675455 100644
--- a/fs/dlm/dir.c
+++ b/fs/dlm/dir.c
@@ -33,7 +33,7 @@
 
 static struct dlm_direntry *get_free_de(struct dlm_ls *ls, int len)
 {
-	int found = FALSE;
+	int found = 0;
 	struct dlm_direntry *de;
 
 	spin_lock(&ls->ls_recover_list_lock);
@@ -42,7 +42,7 @@
 			list_del(&de->list);
 			de->master_nodeid = 0;
 			memset(de->name, 0, len);
-			found = TRUE;
+			found = 1;
 			break;
 		}
 	}
diff --git a/fs/dlm/dlm_internal.h b/fs/dlm/dlm_internal.h
index 0020cd0..16f20cf 100644
--- a/fs/dlm/dlm_internal.h
+++ b/fs/dlm/dlm_internal.h
@@ -35,6 +35,7 @@
 #include <linux/kref.h>
 #include <linux/kernel.h>
 #include <linux/jhash.h>
+#include <linux/mutex.h>
 #include <asm/semaphore.h>
 #include <asm/uaccess.h>
 
@@ -42,20 +43,6 @@
 
 #define DLM_LOCKSPACE_LEN	64
 
-#ifndef TRUE
-#define TRUE 1
-#endif
-
-#ifndef FALSE
-#define FALSE 0
-#endif
-
-#if (BITS_PER_LONG == 64)
-#define PRIx64 "lx"
-#else
-#define PRIx64 "Lx"
-#endif
-
 /* Size of the temp buffer midcomms allocates on the stack.
    We try to make this large enough so most messages fit.
    FIXME: should sctp make this unnecessary? */
@@ -266,7 +253,7 @@
 struct dlm_rsb {
 	struct dlm_ls		*res_ls;	/* the lockspace */
 	struct kref		res_ref;
-	struct semaphore	res_sem;
+	struct mutex		res_mutex;
 	unsigned long		res_flags;
 	int			res_length;	/* length of rsb name */
 	int			res_nodeid;
@@ -449,7 +436,7 @@
 	struct dlm_dirtable	*ls_dirtbl;
 	uint32_t		ls_dirtbl_size;
 
-	struct semaphore	ls_waiters_sem;
+	struct mutex		ls_waiters_mutex;
 	struct list_head	ls_waiters;	/* lkbs needing a reply */
 
 	struct list_head	ls_nodes;	/* current nodes in ls */
@@ -472,14 +459,14 @@
 
 	struct timer_list	ls_timer;
 	struct task_struct	*ls_recoverd_task;
-	struct semaphore	ls_recoverd_active;
+	struct mutex		ls_recoverd_active;
 	spinlock_t		ls_recover_lock;
 	uint32_t		ls_recover_status; /* DLM_RS_ */
 	uint64_t		ls_recover_seq;
 	struct dlm_recover	*ls_recover_args;
 	struct rw_semaphore	ls_in_recovery;	/* block local requests */
 	struct list_head	ls_requestqueue;/* queue remote requests */
-	struct semaphore	ls_requestqueue_lock;
+	struct mutex		ls_requestqueue_mutex;
 	char			*ls_recover_buf;
 	struct list_head	ls_recover_list;
 	spinlock_t		ls_recover_list_lock;
diff --git a/fs/dlm/lock.c b/fs/dlm/lock.c
index 81efb36..29d3b95 100644
--- a/fs/dlm/lock.c
+++ b/fs/dlm/lock.c
@@ -215,15 +215,15 @@
 {
 	if (lkb->lkb_flags & DLM_IFL_MSTCPY)
 		DLM_ASSERT(lkb->lkb_nodeid, dlm_print_lkb(lkb););
-	return (lkb->lkb_flags & DLM_IFL_MSTCPY) ? TRUE : FALSE;
+	return (lkb->lkb_flags & DLM_IFL_MSTCPY) ? 1 : 0;
 }
 
 static inline int middle_conversion(struct dlm_lkb *lkb)
 {
 	if ((lkb->lkb_grmode==DLM_LOCK_PR && lkb->lkb_rqmode==DLM_LOCK_CW) ||
 	    (lkb->lkb_rqmode==DLM_LOCK_PR && lkb->lkb_grmode==DLM_LOCK_CW))
-		return TRUE;
-	return FALSE;
+		return 1;
+	return 0;
 }
 
 static inline int down_conversion(struct dlm_lkb *lkb)
@@ -269,7 +269,7 @@
 	r->res_ls = ls;
 	r->res_length = len;
 	memcpy(r->res_name, name, len);
-	init_MUTEX(&r->res_sem);
+	mutex_init(&r->res_mutex);
 
 	INIT_LIST_HEAD(&r->res_lookup);
 	INIT_LIST_HEAD(&r->res_grantqueue);
@@ -712,7 +712,7 @@
 {
 	struct dlm_ls *ls = lkb->lkb_resource->res_ls;
 
-	down(&ls->ls_waiters_sem);
+	mutex_lock(&ls->ls_waiters_mutex);
 	if (lkb->lkb_wait_type) {
 		log_print("add_to_waiters error %d", lkb->lkb_wait_type);
 		goto out;
@@ -721,7 +721,7 @@
 	kref_get(&lkb->lkb_ref);
 	list_add(&lkb->lkb_wait_reply, &ls->ls_waiters);
  out:
-	up(&ls->ls_waiters_sem);
+	mutex_unlock(&ls->ls_waiters_mutex);
 }
 
 static int _remove_from_waiters(struct dlm_lkb *lkb)
@@ -745,9 +745,9 @@
 	struct dlm_ls *ls = lkb->lkb_resource->res_ls;
 	int error;
 
-	down(&ls->ls_waiters_sem);
+	mutex_lock(&ls->ls_waiters_mutex);
 	error = _remove_from_waiters(lkb);
-	up(&ls->ls_waiters_sem);
+	mutex_unlock(&ls->ls_waiters_mutex);
 	return error;
 }
 
@@ -775,14 +775,14 @@
 	int count = 0, found;
 
 	for (;;) {
-		found = FALSE;
+		found = 0;
 		write_lock(&ls->ls_rsbtbl[b].lock);
 		list_for_each_entry_reverse(r, &ls->ls_rsbtbl[b].toss,
 					    res_hashchain) {
 			if (!time_after_eq(jiffies, r->res_toss_time +
 					   dlm_config.toss_secs * HZ))
 				continue;
-			found = TRUE;
+			found = 1;
 			break;
 		}
 
@@ -1027,9 +1027,9 @@
 	struct dlm_lkb *first = list_entry(head->next, struct dlm_lkb,
 					   lkb_statequeue);
 	if (lkb->lkb_id == first->lkb_id)
-		return TRUE;
+		return 1;
 
-	return FALSE;
+	return 0;
 }
 
 /* Return 1 if the locks' ranges overlap.  If the lkb has no range then it is
@@ -1038,13 +1038,13 @@
 static inline int ranges_overlap(struct dlm_lkb *lkb1, struct dlm_lkb *lkb2)
 {
 	if (!lkb1->lkb_range || !lkb2->lkb_range)
-		return TRUE;
+		return 1;
 
 	if (lkb1->lkb_range[RQ_RANGE_END] < lkb2->lkb_range[GR_RANGE_START] ||
 	    lkb1->lkb_range[RQ_RANGE_START] > lkb2->lkb_range[GR_RANGE_END])
-		return FALSE;
+		return 0;
 
-	return TRUE;
+	return 1;
 }
 
 /* Check if the given lkb conflicts with another lkb on the queue. */
@@ -1057,9 +1057,9 @@
 		if (this == lkb)
 			continue;
 		if (ranges_overlap(lkb, this) && !modes_compat(this, lkb))
-			return TRUE;
+			return 1;
 	}
-	return FALSE;
+	return 0;
 }
 
 /*
@@ -1103,7 +1103,7 @@
 			continue;
 
 		if (!modes_compat(this, lkb) && !modes_compat(lkb, this))
-			return TRUE;
+			return 1;
 	}
 
 	/* if lkb is on the convert queue and is preventing the first
@@ -1114,10 +1114,10 @@
 	if (self && self != first) {
 		if (!modes_compat(lkb, first) &&
 		    !queue_conflict(&rsb->res_grantqueue, first))
-			return TRUE;
+			return 1;
 	}
 
-	return FALSE;
+	return 0;
 }
 
 /*
@@ -1157,7 +1157,7 @@
 	 */
 
 	if (lkb->lkb_exflags & DLM_LKF_EXPEDITE)
-		return TRUE;
+		return 1;
 
 	/*
 	 * A shortcut. Without this, !queue_conflict(grantqueue, lkb) would be
@@ -1200,7 +1200,7 @@
 	 */
 
 	if (now && conv && !(lkb->lkb_exflags & DLM_LKF_QUECVT))
-		return TRUE;
+		return 1;
 
 	/*
 	 * When using range locks the NOORDER flag is set to avoid the standard
@@ -1208,7 +1208,7 @@
 	 */
 
 	if (lkb->lkb_exflags & DLM_LKF_NOORDER)
-		return TRUE;
+		return 1;
 
 	/*
 	 * 6-3: Once in that queue [CONVERTING], a conversion request cannot be
@@ -1217,7 +1217,7 @@
 	 */
 
 	if (!now && conv && first_in_list(lkb, &r->res_convertqueue))
-		return TRUE;
+		return 1;
 
 	/*
 	 * 6-4: By default, a new request is immediately granted only if all
@@ -1232,7 +1232,7 @@
 
 	if (now && !conv && list_empty(&r->res_convertqueue) &&
 	    list_empty(&r->res_waitqueue))
-		return TRUE;
+		return 1;
 
 	/*
 	 * 6-4: Once a lock request is in the queue of ungranted new requests,
@@ -1244,7 +1244,7 @@
 
 	if (!now && !conv && list_empty(&r->res_convertqueue) &&
 	    first_in_list(lkb, &r->res_waitqueue))
-		return TRUE;
+		return 1;
 
  out:
 	/*
@@ -1257,7 +1257,7 @@
 		lkb->lkb_sbflags |= DLM_SBF_DEMOTED;
 	}
 
-	return FALSE;
+	return 0;
 }
 
 /*
@@ -1308,7 +1308,7 @@
 
 	list_for_each_entry_safe(lkb, s, &r->res_convertqueue, lkb_statequeue) {
 		demoted = is_demoted(lkb);
-		if (can_be_granted(r, lkb, FALSE)) {
+		if (can_be_granted(r, lkb, 0)) {
 			grant_lock_pending(r, lkb);
 			grant_restart = 1;
 		} else {
@@ -1333,7 +1333,7 @@
 	struct dlm_lkb *lkb, *s;
 
 	list_for_each_entry_safe(lkb, s, &r->res_waitqueue, lkb_statequeue) {
-		if (can_be_granted(r, lkb, FALSE))
+		if (can_be_granted(r, lkb, 0))
 			grant_lock_pending(r, lkb);
                 else
 			high = max_t(int, lkb->lkb_rqmode, high);
@@ -1705,7 +1705,7 @@
 {
 	int error = 0;
 
-	if (can_be_granted(r, lkb, TRUE)) {
+	if (can_be_granted(r, lkb, 1)) {
 		grant_lock(r, lkb);
 		queue_cast(r, lkb, 0);
 		goto out;
@@ -1733,7 +1733,7 @@
 
 	/* changing an existing lock may allow others to be granted */
 
-	if (can_be_granted(r, lkb, TRUE)) {
+	if (can_be_granted(r, lkb, 1)) {
 		grant_lock(r, lkb);
 		queue_cast(r, lkb, 0);
 		grant_pending_locks(r);
@@ -2556,7 +2556,7 @@
 {
 	struct dlm_lkb *lkb;
 	struct dlm_rsb *r;
-	int error, reply = TRUE;
+	int error, reply = 1;
 
 	error = find_lkb(ls, ms->m_remid, &lkb);
 	if (error)
@@ -3205,7 +3205,7 @@
 {
 	struct dlm_lkb *lkb, *safe;
 
-	down(&ls->ls_waiters_sem);
+	mutex_lock(&ls->ls_waiters_mutex);
 
 	list_for_each_entry_safe(lkb, safe, &ls->ls_waiters, lkb_wait_reply) {
 		log_debug(ls, "pre recover waiter lkid %x type %d flags %x",
@@ -3253,7 +3253,7 @@
 				  lkb->lkb_wait_type);
 		}
 	}
-	up(&ls->ls_waiters_sem);
+	mutex_unlock(&ls->ls_waiters_mutex);
 }
 
 static int remove_resend_waiter(struct dlm_ls *ls, struct dlm_lkb **lkb_ret)
@@ -3261,7 +3261,7 @@
 	struct dlm_lkb *lkb;
 	int rv = 0;
 
-	down(&ls->ls_waiters_sem);
+	mutex_lock(&ls->ls_waiters_mutex);
 	list_for_each_entry(lkb, &ls->ls_waiters, lkb_wait_reply) {
 		if (lkb->lkb_flags & DLM_IFL_RESEND) {
 			rv = lkb->lkb_wait_type;
@@ -3270,7 +3270,7 @@
 			break;
 		}
 	}
-	up(&ls->ls_waiters_sem);
+	mutex_unlock(&ls->ls_waiters_mutex);
 
 	if (!rv)
 		lkb = NULL;
diff --git a/fs/dlm/lock.h b/fs/dlm/lock.h
index 9e6499f..bffab9c 100644
--- a/fs/dlm/lock.h
+++ b/fs/dlm/lock.h
@@ -38,12 +38,12 @@
 
 static inline void lock_rsb(struct dlm_rsb *r)
 {
-	down(&r->res_sem);
+	mutex_lock(&r->res_mutex);
 }
 
 static inline void unlock_rsb(struct dlm_rsb *r)
 {
-	up(&r->res_sem);
+	mutex_unlock(&r->res_mutex);
 }
 
 #endif
diff --git a/fs/dlm/lockspace.c b/fs/dlm/lockspace.c
index fee4659..d2ff505 100644
--- a/fs/dlm/lockspace.c
+++ b/fs/dlm/lockspace.c
@@ -31,7 +31,7 @@
 #endif
 
 static int			ls_count;
-static struct semaphore		ls_lock;
+static struct mutex		ls_lock;
 static struct list_head		lslist;
 static spinlock_t		lslist_lock;
 static struct task_struct *	scand_task;
@@ -177,7 +177,7 @@
 	int error;
 
 	ls_count = 0;
-	init_MUTEX(&ls_lock);
+	mutex_init(&ls_lock);
 	INIT_LIST_HEAD(&lslist);
 	spin_lock_init(&lslist_lock);
 
@@ -351,10 +351,9 @@
 		return -EEXIST;
 	}
 
-	ls = kmalloc(sizeof(struct dlm_ls) + namelen, GFP_KERNEL);
+	ls = kzalloc(sizeof(struct dlm_ls) + namelen, GFP_KERNEL);
 	if (!ls)
 		goto out;
-	memset(ls, 0, sizeof(struct dlm_ls) + namelen);
 	memcpy(ls->ls_name, name, namelen);
 	ls->ls_namelen = namelen;
 	ls->ls_exflags = flags;
@@ -398,7 +397,7 @@
 	}
 
 	INIT_LIST_HEAD(&ls->ls_waiters);
-	init_MUTEX(&ls->ls_waiters_sem);
+	mutex_init(&ls->ls_waiters_mutex);
 
 	INIT_LIST_HEAD(&ls->ls_nodes);
 	INIT_LIST_HEAD(&ls->ls_nodes_gone);
@@ -416,14 +415,14 @@
 	ls->ls_uevent_result = 0;
 
 	ls->ls_recoverd_task = NULL;
-	init_MUTEX(&ls->ls_recoverd_active);
+	mutex_init(&ls->ls_recoverd_active);
 	spin_lock_init(&ls->ls_recover_lock);
 	ls->ls_recover_status = 0;
 	ls->ls_recover_seq = 0;
 	ls->ls_recover_args = NULL;
 	init_rwsem(&ls->ls_in_recovery);
 	INIT_LIST_HEAD(&ls->ls_requestqueue);
-	init_MUTEX(&ls->ls_requestqueue_lock);
+	mutex_init(&ls->ls_requestqueue_mutex);
 
 	ls->ls_recover_buf = kmalloc(dlm_config.buffer_size, GFP_KERNEL);
 	if (!ls->ls_recover_buf)
@@ -493,7 +492,7 @@
 {
 	int error = 0;
 
-	down(&ls_lock);
+	mutex_lock(&ls_lock);
 	if (!ls_count)
 		error = threads_start();
 	if (error)
@@ -503,7 +502,7 @@
 	if (!error)
 		ls_count++;
  out:
-	up(&ls_lock);
+	mutex_unlock(&ls_lock);
 	return error;
 }
 
@@ -629,11 +628,11 @@
 	kobject_unregister(&ls->ls_kobj);
 	kfree(ls);
 
-	down(&ls_lock);
+	mutex_lock(&ls_lock);
 	ls_count--;
 	if (!ls_count)
 		threads_stop();
-	up(&ls_lock);
+	mutex_unlock(&ls_lock);
 
 	module_put(THIS_MODULE);
 	return 0;
diff --git a/fs/dlm/member.c b/fs/dlm/member.c
index 439249b..926cd0c 100644
--- a/fs/dlm/member.c
+++ b/fs/dlm/member.c
@@ -52,7 +52,7 @@
 	struct dlm_member *memb;
 	int w;
 
-	memb = kmalloc(sizeof(struct dlm_member), GFP_KERNEL);
+	memb = kzalloc(sizeof(struct dlm_member), GFP_KERNEL);
 	if (!memb)
 		return -ENOMEM;
 
@@ -79,9 +79,9 @@
 
 	list_for_each_entry(memb, &ls->ls_nodes, list) {
 		if (memb->nodeid == nodeid)
-			return TRUE;
+			return 1;
 	}
-	return FALSE;
+	return 0;
 }
 
 int dlm_is_removed(struct dlm_ls *ls, int nodeid)
@@ -90,9 +90,9 @@
 
 	list_for_each_entry(memb, &ls->ls_nodes_gone, list) {
 		if (memb->nodeid == nodeid)
-			return TRUE;
+			return 1;
 	}
-	return FALSE;
+	return 0;
 }
 
 static void clear_memb_list(struct list_head *head)
@@ -178,10 +178,10 @@
 	/* move departed members from ls_nodes to ls_nodes_gone */
 
 	list_for_each_entry_safe(memb, safe, &ls->ls_nodes, list) {
-		found = FALSE;
+		found = 0;
 		for (i = 0; i < rv->node_count; i++) {
 			if (memb->nodeid == rv->nodeids[i]) {
-				found = TRUE;
+				found = 1;
 				break;
 			}
 		}
@@ -271,10 +271,9 @@
 	int *ids = NULL;
 	int error, count;
 
-	rv = kmalloc(sizeof(struct dlm_recover), GFP_KERNEL);
+	rv = kzalloc(sizeof(struct dlm_recover), GFP_KERNEL);
 	if (!rv)
 		return -ENOMEM;
-	memset(rv, 0, sizeof(struct dlm_recover));
 
 	error = count = dlm_nodeid_list(ls->ls_name, &ids);
 	if (error <= 0)
diff --git a/fs/dlm/midcomms.c b/fs/dlm/midcomms.c
index d96f9bb..c9b1c3d 100644
--- a/fs/dlm/midcomms.c
+++ b/fs/dlm/midcomms.c
@@ -119,7 +119,7 @@
 
 		switch (msg->h_cmd) {
 		case DLM_MSG:
-			dlm_receive_message(msg, nodeid, FALSE);
+			dlm_receive_message(msg, nodeid, 0);
 			break;
 
 		case DLM_RCOM:
diff --git a/fs/dlm/recover.c b/fs/dlm/recover.c
index 1712c97..b036ee7 100644
--- a/fs/dlm/recover.c
+++ b/fs/dlm/recover.c
@@ -420,7 +420,7 @@
 
 	r = recover_list_find(ls, rc->rc_id);
 	if (!r) {
-		log_error(ls, "dlm_recover_master_reply no id %"PRIx64"",
+		log_error(ls, "dlm_recover_master_reply no id %llx",
 			  rc->rc_id);
 		goto out;
 	}
@@ -477,8 +477,8 @@
 	if (!list_empty(&r->res_grantqueue) ||
 	    !list_empty(&r->res_convertqueue) ||
 	    !list_empty(&r->res_waitqueue))
-		return FALSE;
-	return TRUE;
+		return 0;
+	return 1;
 }
 
 static int recover_locks(struct dlm_rsb *r)
@@ -586,18 +586,18 @@
 {
 	struct dlm_lkb *lkb, *high_lkb = NULL;
 	uint32_t high_seq = 0;
-	int lock_lvb_exists = FALSE;
-	int big_lock_exists = FALSE;
+	int lock_lvb_exists = 0;
+	int big_lock_exists = 0;
 	int lvblen = r->res_ls->ls_lvblen;
 
 	list_for_each_entry(lkb, &r->res_grantqueue, lkb_statequeue) {
 		if (!(lkb->lkb_exflags & DLM_LKF_VALBLK))
 			continue;
 
-		lock_lvb_exists = TRUE;
+		lock_lvb_exists = 1;
 
 		if (lkb->lkb_grmode > DLM_LOCK_CR) {
-			big_lock_exists = TRUE;
+			big_lock_exists = 1;
 			goto setflag;
 		}
 
@@ -611,10 +611,10 @@
 		if (!(lkb->lkb_exflags & DLM_LKF_VALBLK))
 			continue;
 
-		lock_lvb_exists = TRUE;
+		lock_lvb_exists = 1;
 
 		if (lkb->lkb_grmode > DLM_LOCK_CR) {
-			big_lock_exists = TRUE;
+			big_lock_exists = 1;
 			goto setflag;
 		}
 
diff --git a/fs/dlm/recoverd.c b/fs/dlm/recoverd.c
index 06e4f7c..7010353 100644
--- a/fs/dlm/recoverd.c
+++ b/fs/dlm/recoverd.c
@@ -45,9 +45,9 @@
 	unsigned long start;
 	int error, neg = 0;
 
-	log_debug(ls, "recover %"PRIx64"", rv->seq);
+	log_debug(ls, "recover %llx", rv->seq);
 
-	down(&ls->ls_recoverd_active);
+	mutex_lock(&ls->ls_recoverd_active);
 
 	/*
 	 * Suspending and resuming dlm_astd ensures that no lkb's from this ls
@@ -199,16 +199,16 @@
 
 	dlm_astd_wake();
 
-	log_debug(ls, "recover %"PRIx64" done: %u ms", rv->seq,
+	log_debug(ls, "recover %llx done: %u ms", rv->seq,
 		  jiffies_to_msecs(jiffies - start));
-	up(&ls->ls_recoverd_active);
+	mutex_unlock(&ls->ls_recoverd_active);
 
 	return 0;
 
  fail:
 	dlm_release_root_list(ls);
-	log_debug(ls, "recover %"PRIx64" error %d", rv->seq, error);
-	up(&ls->ls_recoverd_active);
+	log_debug(ls, "recover %llx error %d", rv->seq, error);
+	mutex_unlock(&ls->ls_recoverd_active);
 	return error;
 }
 
@@ -275,11 +275,11 @@
 
 void dlm_recoverd_suspend(struct dlm_ls *ls)
 {
-	down(&ls->ls_recoverd_active);
+	mutex_lock(&ls->ls_recoverd_active);
 }
 
 void dlm_recoverd_resume(struct dlm_ls *ls)
 {
-	up(&ls->ls_recoverd_active);
+	mutex_unlock(&ls->ls_recoverd_active);
 }
 
diff --git a/fs/dlm/requestqueue.c b/fs/dlm/requestqueue.c
index 36afe99..7b2b089 100644
--- a/fs/dlm/requestqueue.c
+++ b/fs/dlm/requestqueue.c
@@ -47,9 +47,9 @@
 	e->nodeid = nodeid;
 	memcpy(e->request, hd, length);
 
-	down(&ls->ls_requestqueue_lock);
+	mutex_lock(&ls->ls_requestqueue_mutex);
 	list_add_tail(&e->list, &ls->ls_requestqueue);
-	up(&ls->ls_requestqueue_lock);
+	mutex_unlock(&ls->ls_requestqueue_mutex);
 }
 
 int dlm_process_requestqueue(struct dlm_ls *ls)
@@ -58,19 +58,19 @@
 	struct dlm_header *hd;
 	int error = 0;
 
-	down(&ls->ls_requestqueue_lock);
+	mutex_lock(&ls->ls_requestqueue_mutex);
 
 	for (;;) {
 		if (list_empty(&ls->ls_requestqueue)) {
-			up(&ls->ls_requestqueue_lock);
+			mutex_unlock(&ls->ls_requestqueue_mutex);
 			error = 0;
 			break;
 		}
 		e = list_entry(ls->ls_requestqueue.next, struct rq_entry, list);
-		up(&ls->ls_requestqueue_lock);
+		mutex_unlock(&ls->ls_requestqueue_mutex);
 
 		hd = (struct dlm_header *) e->request;
-		error = dlm_receive_message(hd, e->nodeid, TRUE);
+		error = dlm_receive_message(hd, e->nodeid, 1);
 
 		if (error == -EINTR) {
 			/* entry is left on requestqueue */
@@ -78,13 +78,13 @@
 			break;
 		}
 
-		down(&ls->ls_requestqueue_lock);
+		mutex_lock(&ls->ls_requestqueue_mutex);
 		list_del(&e->list);
 		kfree(e);
 
 		if (dlm_locking_stopped(ls)) {
 			log_debug(ls, "process_requestqueue abort running");
-			up(&ls->ls_requestqueue_lock);
+			mutex_unlock(&ls->ls_requestqueue_mutex);
 			error = -EINTR;
 			break;
 		}
@@ -105,15 +105,15 @@
 void dlm_wait_requestqueue(struct dlm_ls *ls)
 {
 	for (;;) {
-		down(&ls->ls_requestqueue_lock);
+		mutex_lock(&ls->ls_requestqueue_mutex);
 		if (list_empty(&ls->ls_requestqueue))
 			break;
 		if (dlm_locking_stopped(ls))
 			break;
-		up(&ls->ls_requestqueue_lock);
+		mutex_unlock(&ls->ls_requestqueue_mutex);
 		schedule();
 	}
-	up(&ls->ls_requestqueue_lock);
+	mutex_unlock(&ls->ls_requestqueue_mutex);
 }
 
 static int purge_request(struct dlm_ls *ls, struct dlm_message *ms, int nodeid)
@@ -170,7 +170,7 @@
 	struct dlm_message *ms;
 	struct rq_entry *e, *safe;
 
-	down(&ls->ls_requestqueue_lock);
+	mutex_lock(&ls->ls_requestqueue_mutex);
 	list_for_each_entry_safe(e, safe, &ls->ls_requestqueue, list) {
 		ms = (struct dlm_message *) e->request;
 
@@ -179,6 +179,6 @@
 			kfree(e);
 		}
 	}
-	up(&ls->ls_requestqueue_lock);
+	mutex_unlock(&ls->ls_requestqueue_mutex);
 }