[GFS2] Use void * instead of typedef for locking module interface

As requested by Jan Engelhardt, this removes the typedefs in the
locking module interface and replaces them with void *. Also
since we are changing the interface, I've added a few consts
as well.

Cc: Jan Engelhardt <jengelh@linux01.gwdg.de>
Cc: David Teigland <teigland@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

fs/gfs2/glock.c

@@ -1713,8 +1713,9 @@ static void blocking_cb(struct gfs2_sbd *sdp, struct lm_lockname *name,
  * a journal from another client needs to be recovered.
  */
 
-void gfs2_glock_cb(struct gfs2_sbd *sdp, unsigned int type, void *data)
+void gfs2_glock_cb(void *cb_data, unsigned int type, void *data)
 {
+	struct gfs2_sbd *sdp = cb_data;
 
 	switch (type) {
 	case LM_CB_NEED_E:

fs/gfs2/glock.h

@@ -140,7 +140,7 @@ static inline int gfs2_glock_nq_init(struct gfs2_glock *gl,
 int gfs2_lvb_hold(struct gfs2_glock *gl);
 void gfs2_lvb_unhold(struct gfs2_glock *gl);
 
-void gfs2_glock_cb(struct gfs2_sbd *sdp, unsigned int type, void *data);
+void gfs2_glock_cb(void *cb_data, unsigned int type, void *data);
 
 void gfs2_iopen_go_callback(struct gfs2_glock *gl, unsigned int state);
 

fs/gfs2/incore.h

@@ -187,7 +187,7 @@ struct gfs2_glock {
 	struct gfs2_holder *gl_req_gh;
 	gfs2_glop_bh_t gl_req_bh;
 
-	lm_lock_t *gl_lock;
+	void *gl_lock;
 	char *gl_lvb;
 	atomic_t gl_lvb_count;
 

fs/gfs2/lm.c

@@ -122,7 +122,7 @@ int gfs2_lm_withdraw(struct gfs2_sbd *sdp, char *fmt, ...)
 }
 
 int gfs2_lm_get_lock(struct gfs2_sbd *sdp, struct lm_lockname *name,
-		     lm_lock_t **lockp)
+		     void **lockp)
 {
 	int error = -EIO;
 	if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
@@ -131,13 +131,13 @@ int gfs2_lm_get_lock(struct gfs2_sbd *sdp, struct lm_lockname *name,
 	return error;
 }
 
-void gfs2_lm_put_lock(struct gfs2_sbd *sdp, lm_lock_t *lock)
+void gfs2_lm_put_lock(struct gfs2_sbd *sdp, void *lock)
 {
 	if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
 		sdp->sd_lockstruct.ls_ops->lm_put_lock(lock);
 }
 
-unsigned int gfs2_lm_lock(struct gfs2_sbd *sdp, lm_lock_t *lock,
+unsigned int gfs2_lm_lock(struct gfs2_sbd *sdp, void *lock,
 			  unsigned int cur_state, unsigned int req_state,
 			  unsigned int flags)
 {
@@ -148,7 +148,7 @@ unsigned int gfs2_lm_lock(struct gfs2_sbd *sdp, lm_lock_t *lock,
 	return ret;
 }
 
-unsigned int gfs2_lm_unlock(struct gfs2_sbd *sdp, lm_lock_t *lock,
+unsigned int gfs2_lm_unlock(struct gfs2_sbd *sdp, void *lock,
 			    unsigned int cur_state)
 {
 	int ret = 0;
@@ -157,13 +157,13 @@ unsigned int gfs2_lm_unlock(struct gfs2_sbd *sdp, lm_lock_t *lock,
 	return ret;
 }
 
-void gfs2_lm_cancel(struct gfs2_sbd *sdp, lm_lock_t *lock)
+void gfs2_lm_cancel(struct gfs2_sbd *sdp, void *lock)
 {
 	if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
 		sdp->sd_lockstruct.ls_ops->lm_cancel(lock);
 }
 
-int gfs2_lm_hold_lvb(struct gfs2_sbd *sdp, lm_lock_t *lock, char **lvbp)
+int gfs2_lm_hold_lvb(struct gfs2_sbd *sdp, void *lock, char **lvbp)
 {
 	int error = -EIO;
 	if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
@@ -171,7 +171,7 @@ int gfs2_lm_hold_lvb(struct gfs2_sbd *sdp, lm_lock_t *lock, char **lvbp)
 	return error;
 }
 
-void gfs2_lm_unhold_lvb(struct gfs2_sbd *sdp, lm_lock_t *lock, char *lvb)
+void gfs2_lm_unhold_lvb(struct gfs2_sbd *sdp, void *lock, char *lvb)
 {
 	if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
 		sdp->sd_lockstruct.ls_ops->lm_unhold_lvb(lock, lvb);

fs/gfs2/lm.h

@@ -20,16 +20,16 @@ void gfs2_lm_unmount(struct gfs2_sbd *sdp);
 int gfs2_lm_withdraw(struct gfs2_sbd *sdp, char *fmt, ...)
 				__attribute__ ((format(printf, 2, 3)));
 int gfs2_lm_get_lock(struct gfs2_sbd *sdp, struct lm_lockname *name,
-		     lm_lock_t **lockp);
-void gfs2_lm_put_lock(struct gfs2_sbd *sdp, lm_lock_t *lock);
-unsigned int gfs2_lm_lock(struct gfs2_sbd *sdp, lm_lock_t *lock,
+		     void **lockp);
+void gfs2_lm_put_lock(struct gfs2_sbd *sdp, void *lock);
+unsigned int gfs2_lm_lock(struct gfs2_sbd *sdp, void *lock,
 			 unsigned int cur_state, unsigned int req_state,
 			 unsigned int flags);
-unsigned int gfs2_lm_unlock(struct gfs2_sbd *sdp, lm_lock_t *lock,
+unsigned int gfs2_lm_unlock(struct gfs2_sbd *sdp, void *lock,
 			   unsigned int cur_state);
-void gfs2_lm_cancel(struct gfs2_sbd *sdp, lm_lock_t *lock);
-int gfs2_lm_hold_lvb(struct gfs2_sbd *sdp, lm_lock_t *lock, char **lvbp);
-void gfs2_lm_unhold_lvb(struct gfs2_sbd *sdp, lm_lock_t *lock, char *lvb);
+void gfs2_lm_cancel(struct gfs2_sbd *sdp, void *lock);
+int gfs2_lm_hold_lvb(struct gfs2_sbd *sdp, void *lock, char **lvbp);
+void gfs2_lm_unhold_lvb(struct gfs2_sbd *sdp, void *lock, char *lvb);
 int gfs2_lm_plock_get(struct gfs2_sbd *sdp, struct lm_lockname *name,
 		      struct file *file, struct file_lock *fl);
 int gfs2_lm_plock(struct gfs2_sbd *sdp, struct lm_lockname *name,

fs/gfs2/lm_interface.h

@@ -10,16 +10,8 @@
 #ifndef __LM_INTERFACE_DOT_H__
 #define __LM_INTERFACE_DOT_H__
 
-/*
- * Opaque handles represent the lock module's lockspace structure, the lock
- * module's lock structures, and GFS's file system (superblock) structure.
- */
 
-typedef void lm_lockspace_t;
-typedef void lm_lock_t;
-struct gfs2_sbd;
-
-typedef void (*lm_callback_t) (struct gfs2_sbd *sdp, unsigned int type, void *data);
+typedef void (*lm_callback_t) (void *ptr, unsigned int type, void *data);
 
 /*
  * lm_mount() flags
@@ -175,64 +167,60 @@ struct lm_async_cb {
 struct lm_lockstruct;
 
 struct lm_lockops {
-	char lm_proto_name[256];
+	const char *lm_proto_name;
 
 	/*
 	 * Mount/Unmount
 	 */
 
 	int (*lm_mount) (char *table_name, char *host_data,
-			 lm_callback_t cb, struct gfs2_sbd *sdp,
+			 lm_callback_t cb, void *cb_data,
 			 unsigned int min_lvb_size, int flags,
 			 struct lm_lockstruct *lockstruct,
 			 struct kobject *fskobj);
 
-	void (*lm_others_may_mount) (lm_lockspace_t *lockspace);
+	void (*lm_others_may_mount) (void *lockspace);
 
-	void (*lm_unmount) (lm_lockspace_t *lockspace);
+	void (*lm_unmount) (void *lockspace);
 
-	void (*lm_withdraw) (lm_lockspace_t *lockspace);
+	void (*lm_withdraw) (void *lockspace);
 
 	/*
 	 * Lock oriented operations
 	 */
 
-	int (*lm_get_lock) (lm_lockspace_t *lockspace,
-			    struct lm_lockname *name, lm_lock_t **lockp);
+	int (*lm_get_lock) (void *lockspace, struct lm_lockname *name, void **lockp);
 
-	void (*lm_put_lock) (lm_lock_t *lock);
+	void (*lm_put_lock) (void *lock);
 
-	unsigned int (*lm_lock) (lm_lock_t *lock, unsigned int cur_state,
+	unsigned int (*lm_lock) (void *lock, unsigned int cur_state,
 				 unsigned int req_state, unsigned int flags);
 
-	unsigned int (*lm_unlock) (lm_lock_t *lock, unsigned int cur_state);
+	unsigned int (*lm_unlock) (void *lock, unsigned int cur_state);
 
-	void (*lm_cancel) (lm_lock_t *lock);
+	void (*lm_cancel) (void *lock);
 
-	int (*lm_hold_lvb) (lm_lock_t *lock, char **lvbp);
-	void (*lm_unhold_lvb) (lm_lock_t *lock, char *lvb);
+	int (*lm_hold_lvb) (void *lock, char **lvbp);
+	void (*lm_unhold_lvb) (void *lock, char *lvb);
 
 	/*
 	 * Posix Lock oriented operations
 	 */
 
-	int (*lm_plock_get) (lm_lockspace_t *lockspace,
-			     struct lm_lockname *name,
+	int (*lm_plock_get) (void *lockspace, struct lm_lockname *name,
 			     struct file *file, struct file_lock *fl);
 
-	int (*lm_plock) (lm_lockspace_t *lockspace,
-			 struct lm_lockname *name,
+	int (*lm_plock) (void *lockspace, struct lm_lockname *name,
 			 struct file *file, int cmd, struct file_lock *fl);
 
-	int (*lm_punlock) (lm_lockspace_t *lockspace,
-			   struct lm_lockname *name,
+	int (*lm_punlock) (void *lockspace, struct lm_lockname *name,
 			   struct file *file, struct file_lock *fl);
 
 	/*
 	 * Client oriented operations
 	 */
 
-	void (*lm_recovery_done) (lm_lockspace_t *lockspace, unsigned int jid,
+	void (*lm_recovery_done) (void *lockspace, unsigned int jid,
 				  unsigned int message);
 
 	struct module *lm_owner;
@@ -253,8 +241,8 @@ struct lm_lockstruct {
 	unsigned int ls_jid;
 	unsigned int ls_first;
 	unsigned int ls_lvb_size;
-	lm_lockspace_t *ls_lockspace;
-	struct lm_lockops *ls_ops;
+	void *ls_lockspace;
+	const struct lm_lockops *ls_ops;
 	int ls_flags;
 };
 
@@ -263,9 +251,8 @@ struct lm_lockstruct {
  * with these functions.
  */
 
-int gfs2_register_lockproto(struct lm_lockops *proto);
-
-void gfs2_unregister_lockproto(struct lm_lockops *proto);
+int gfs2_register_lockproto(const struct lm_lockops *proto);
+void gfs2_unregister_lockproto(const struct lm_lockops *proto);
 
 /*
  * Lock module top interface.  GFS calls these functions when mounting or
@@ -273,7 +260,7 @@ void gfs2_unregister_lockproto(struct lm_lockops *proto);
  */
 
 int gfs2_mount_lockproto(char *proto_name, char *table_name, char *host_data,
-			 lm_callback_t cb, struct gfs2_sbd *sdp,
+			 lm_callback_t cb, void *cb_data,
 			 unsigned int min_lvb_size, int flags,
 			 struct lm_lockstruct *lockstruct,
 			 struct kobject *fskobj);

fs/gfs2/locking.c

@@ -21,7 +21,7 @@
 
 struct lmh_wrapper {
 	struct list_head lw_list;
-	struct lm_lockops *lw_ops;
+	const struct lm_lockops *lw_ops;
 };
 
 /* List of registered low-level locking protocols.  A file system selects one
@@ -37,7 +37,7 @@ static DEFINE_MUTEX(lmh_lock);
  * Returns: 0 on success, -EXXX on failure
  */
 
-int gfs2_register_lockproto(struct lm_lockops *proto)
+int gfs2_register_lockproto(const struct lm_lockops *proto)
 {
 	struct lmh_wrapper *lw;
 
@@ -72,7 +72,7 @@ int gfs2_register_lockproto(struct lm_lockops *proto)
  *
  */
 
-void gfs2_unregister_lockproto(struct lm_lockops *proto)
+void gfs2_unregister_lockproto(const struct lm_lockops *proto)
 {
 	struct lmh_wrapper *lw;
 
@@ -108,7 +108,7 @@ void gfs2_unregister_lockproto(struct lm_lockops *proto)
  */
 
 int gfs2_mount_lockproto(char *proto_name, char *table_name, char *host_data,
-			 lm_callback_t cb, struct gfs2_sbd *sdp,
+			 lm_callback_t cb, void *cb_data,
 			 unsigned int min_lvb_size, int flags,
 			 struct lm_lockstruct *lockstruct,
 			 struct kobject *fskobj)
@@ -147,7 +147,7 @@ retry:
 		goto retry;
 	}
 
-	error = lw->lw_ops->lm_mount(table_name, host_data, cb, sdp,
+	error = lw->lw_ops->lm_mount(table_name, host_data, cb, cb_data,
 				     min_lvb_size, flags, lockstruct, fskobj);
 	if (error)
 		module_put(lw->lw_ops->lm_owner);

fs/gfs2/locking/dlm/lock.c

@@ -207,21 +207,21 @@ void gdlm_delete_lp(struct gdlm_lock *lp)
 	kfree(lp);
 }
 
-int gdlm_get_lock(lm_lockspace_t *lockspace, struct lm_lockname *name,
-		  lm_lock_t **lockp)
+int gdlm_get_lock(void *lockspace, struct lm_lockname *name,
+		  void **lockp)
 {
 	struct gdlm_lock *lp;
 	int error;
 
-	error = gdlm_create_lp((struct gdlm_ls *) lockspace, name, &lp);
+	error = gdlm_create_lp(lockspace, name, &lp);
 
-	*lockp = (lm_lock_t *) lp;
+	*lockp = lp;
 	return error;
 }
 
-void gdlm_put_lock(lm_lock_t *lock)
+void gdlm_put_lock(void *lock)
 {
-	gdlm_delete_lp((struct gdlm_lock *) lock);
+	gdlm_delete_lp(lock);
 }
 
 unsigned int gdlm_do_lock(struct gdlm_lock *lp)
@@ -305,10 +305,10 @@ static unsigned int gdlm_do_unlock(struct gdlm_lock *lp)
 	return LM_OUT_ASYNC;
 }
 
-unsigned int gdlm_lock(lm_lock_t *lock, unsigned int cur_state,
+unsigned int gdlm_lock(void *lock, unsigned int cur_state,
 		       unsigned int req_state, unsigned int flags)
 {
-	struct gdlm_lock *lp = (struct gdlm_lock *) lock;
+	struct gdlm_lock *lp = lock;
 
 	clear_bit(LFL_DLM_CANCEL, &lp->flags);
 	if (flags & LM_FLAG_NOEXP)
@@ -321,9 +321,9 @@ unsigned int gdlm_lock(lm_lock_t *lock, unsigned int cur_state,
 	return gdlm_do_lock(lp);
 }
 
-unsigned int gdlm_unlock(lm_lock_t *lock, unsigned int cur_state)
+unsigned int gdlm_unlock(void *lock, unsigned int cur_state)
 {
-	struct gdlm_lock *lp = (struct gdlm_lock *) lock;
+	struct gdlm_lock *lp = lock;
 
 	clear_bit(LFL_DLM_CANCEL, &lp->flags);
 	if (lp->cur == DLM_LOCK_IV)
@@ -331,9 +331,9 @@ unsigned int gdlm_unlock(lm_lock_t *lock, unsigned int cur_state)
 	return gdlm_do_unlock(lp);
 }
 
-void gdlm_cancel(lm_lock_t *lock)
+void gdlm_cancel(void *lock)
 {
-	struct gdlm_lock *lp = (struct gdlm_lock *) lock;
+	struct gdlm_lock *lp = lock;
 	struct gdlm_ls *ls = lp->ls;
 	int error, delay_list = 0;
 
@@ -464,9 +464,9 @@ static void unhold_null_lock(struct gdlm_lock *lp)
    intact on the resource while the lvb is "held" even if it's holding no locks
    on the resource. */
 
-int gdlm_hold_lvb(lm_lock_t *lock, char **lvbp)
+int gdlm_hold_lvb(void *lock, char **lvbp)
 {
-	struct gdlm_lock *lp = (struct gdlm_lock *) lock;
+	struct gdlm_lock *lp = lock;
 	int error;
 
 	error = gdlm_add_lvb(lp);
@@ -482,9 +482,9 @@ int gdlm_hold_lvb(lm_lock_t *lock, char **lvbp)
 	return error;
 }
 
-void gdlm_unhold_lvb(lm_lock_t *lock, char *lvb)
+void gdlm_unhold_lvb(void *lock, char *lvb)
 {
-	struct gdlm_lock *lp = (struct gdlm_lock *) lock;
+	struct gdlm_lock *lp = lock;
 
 	unhold_null_lock(lp);
 	gdlm_del_lvb(lp);

fs/gfs2/locking/dlm/lock_dlm.h

@@ -112,7 +112,7 @@ struct gdlm_lock {
 	s16			cur;
 	s16			req;
 	s16			prev_req;
-	u32		lkf;		/* dlm flags DLM_LKF_ */
+	u32			lkf;		/* dlm flags DLM_LKF_ */
 	unsigned long		flags;		/* lock_dlm flags LFL_ */
 
 	int			bast_mode;	/* protected by async_lock */
@@ -165,23 +165,23 @@ int gdlm_release_all_locks(struct gdlm_ls *);
 void gdlm_delete_lp(struct gdlm_lock *);
 unsigned int gdlm_do_lock(struct gdlm_lock *);
 
-int gdlm_get_lock(lm_lockspace_t *, struct lm_lockname *, lm_lock_t **);
-void gdlm_put_lock(lm_lock_t *);
-unsigned int gdlm_lock(lm_lock_t *, unsigned int, unsigned int, unsigned int);
-unsigned int gdlm_unlock(lm_lock_t *, unsigned int);
-void gdlm_cancel(lm_lock_t *);
-int gdlm_hold_lvb(lm_lock_t *, char **);
-void gdlm_unhold_lvb(lm_lock_t *, char *);
+int gdlm_get_lock(void *, struct lm_lockname *, void **);
+void gdlm_put_lock(void *);
+unsigned int gdlm_lock(void *, unsigned int, unsigned int, unsigned int);
+unsigned int gdlm_unlock(void *, unsigned int);
+void gdlm_cancel(void *);
+int gdlm_hold_lvb(void *, char **);
+void gdlm_unhold_lvb(void *, char *);
 
 /* plock.c */
 
 int gdlm_plock_init(void);
 void gdlm_plock_exit(void);
-int gdlm_plock(lm_lockspace_t *, struct lm_lockname *, struct file *, int,
+int gdlm_plock(void *, struct lm_lockname *, struct file *, int,
 		struct file_lock *);
-int gdlm_plock_get(lm_lockspace_t *, struct lm_lockname *, struct file *,
+int gdlm_plock_get(void *, struct lm_lockname *, struct file *,
 		struct file_lock *);
-int gdlm_punlock(lm_lockspace_t *, struct lm_lockname *, struct file *,
+int gdlm_punlock(void *, struct lm_lockname *, struct file *,
 		struct file_lock *);
 #endif
 

fs/gfs2/locking/dlm/mount.c

@@ -11,7 +11,7 @@
 
 int gdlm_drop_count;
 int gdlm_drop_period;
-struct lm_lockops gdlm_ops;
+const struct lm_lockops gdlm_ops;
 
 
 static struct gdlm_ls *init_gdlm(lm_callback_t cb, struct gfs2_sbd *sdp,
@@ -120,7 +120,7 @@ static int make_args(struct gdlm_ls *ls, char *data_arg, int *nodir)
 }
 
 static int gdlm_mount(char *table_name, char *host_data,
-			lm_callback_t cb, struct gfs2_sbd *sdp,
+			lm_callback_t cb, void *cb_data,
 			unsigned int min_lvb_size, int flags,
 			struct lm_lockstruct *lockstruct,
 			struct kobject *fskobj)
@@ -131,7 +131,7 @@ static int gdlm_mount(char *table_name, char *host_data,
 	if (min_lvb_size > GDLM_LVB_SIZE)
 		goto out;
 
-	ls = init_gdlm(cb, sdp, flags, table_name);
+	ls = init_gdlm(cb, cb_data, flags, table_name);
 	if (!ls)
 		goto out;
 
@@ -174,9 +174,9 @@ out:
 	return error;
 }
 
-static void gdlm_unmount(lm_lockspace_t *lockspace)
+static void gdlm_unmount(void *lockspace)
 {
-	struct gdlm_ls *ls = (struct gdlm_ls *) lockspace;
+	struct gdlm_ls *ls = lockspace;
 	int rv;
 
 	log_debug("unmount flags %lx", ls->flags);
@@ -198,18 +198,18 @@ out:
 	kfree(ls);
 }
 
-static void gdlm_recovery_done(lm_lockspace_t *lockspace, unsigned int jid,
+static void gdlm_recovery_done(void *lockspace, unsigned int jid,
                                unsigned int message)
 {
-	struct gdlm_ls *ls = (struct gdlm_ls *) lockspace;
+	struct gdlm_ls *ls = lockspace;
 	ls->recover_jid_done = jid;
 	ls->recover_jid_status = message;
 	kobject_uevent(&ls->kobj, KOBJ_CHANGE);
 }
 
-static void gdlm_others_may_mount(lm_lockspace_t *lockspace)
+static void gdlm_others_may_mount(void *lockspace)
 {
-	struct gdlm_ls *ls = (struct gdlm_ls *) lockspace;
+	struct gdlm_ls *ls = lockspace;
 	ls->first_done = 1;
 	kobject_uevent(&ls->kobj, KOBJ_CHANGE);
 }
@@ -218,9 +218,9 @@ static void gdlm_others_may_mount(lm_lockspace_t *lockspace)
    other mounters, and lets us know (sets WITHDRAW flag).  Then,
    userspace leaves the mount group while we leave the lockspace. */
 
-static void gdlm_withdraw(lm_lockspace_t *lockspace)
+static void gdlm_withdraw(void *lockspace)
 {
-	struct gdlm_ls *ls = (struct gdlm_ls *) lockspace;
+	struct gdlm_ls *ls = lockspace;
 
 	kobject_uevent(&ls->kobj, KOBJ_OFFLINE);
 
@@ -233,7 +233,7 @@ static void gdlm_withdraw(lm_lockspace_t *lockspace)
 	gdlm_kobject_release(ls);
 }
 
-struct lm_lockops gdlm_ops = {
+const struct lm_lockops gdlm_ops = {
 	.lm_proto_name = "lock_dlm",
 	.lm_mount = gdlm_mount,
 	.lm_others_may_mount = gdlm_others_may_mount,

fs/gfs2/locking/dlm/plock.c

@@ -58,10 +58,10 @@ static void send_op(struct plock_op *op)
 	wake_up(&send_wq);
 }
 
-int gdlm_plock(lm_lockspace_t *lockspace, struct lm_lockname *name,
+int gdlm_plock(void *lockspace, struct lm_lockname *name,
 	       struct file *file, int cmd, struct file_lock *fl)
 {
-	struct gdlm_ls *ls = (struct gdlm_ls *) lockspace;
+	struct gdlm_ls *ls = lockspace;
 	struct plock_op *op;
 	int rv;
 
@@ -102,10 +102,10 @@ int gdlm_plock(lm_lockspace_t *lockspace, struct lm_lockname *name,
 	return rv;
 }
 
-int gdlm_punlock(lm_lockspace_t *lockspace, struct lm_lockname *name,
+int gdlm_punlock(void *lockspace, struct lm_lockname *name,
 		 struct file *file, struct file_lock *fl)
 {
-	struct gdlm_ls *ls = (struct gdlm_ls *) lockspace;
+	struct gdlm_ls *ls = lockspace;
 	struct plock_op *op;
 	int rv;
 
@@ -141,10 +141,10 @@ int gdlm_punlock(lm_lockspace_t *lockspace, struct lm_lockname *name,
 	return rv;
 }
 
-int gdlm_plock_get(lm_lockspace_t *lockspace, struct lm_lockname *name,
+int gdlm_plock_get(void *lockspace, struct lm_lockname *name,
 		   struct file *file, struct file_lock *fl)
 {
-	struct gdlm_ls *ls = (struct gdlm_ls *) lockspace;
+	struct gdlm_ls *ls = lockspace;
 	struct plock_op *op;
 	int rv;
 
@@ -231,8 +231,7 @@ static ssize_t dev_write(struct file *file, const char __user *u, size_t count,
 
 	spin_lock(&ops_lock);
 	list_for_each_entry(op, &recv_list, list) {
-		if (op->info.fsid == info.fsid &&
-		    op->info.number == info.number &&
+		if (op->info.fsid == info.fsid && op->info.number == info.number &&
 		    op->info.owner == info.owner) {
 			list_del_init(&op->list);
 			found = 1;

fs/gfs2/locking/nolock/main.c

@@ -21,10 +21,10 @@ struct nolock_lockspace {
 	unsigned int nl_lvb_size;
 };
 
-static struct lm_lockops nolock_ops;
+static const struct lm_lockops nolock_ops;
 
 static int nolock_mount(char *table_name, char *host_data,
-			lm_callback_t cb, struct gfs2_sbd *sdp,
+			lm_callback_t cb, void *cb_data,
 			unsigned int min_lvb_size, int flags,
 			struct lm_lockstruct *lockstruct,
 			struct kobject *fskobj)
@@ -50,24 +50,24 @@ static int nolock_mount(char *table_name, char *host_data,
 	lockstruct->ls_jid = jid;
 	lockstruct->ls_first = 1;
 	lockstruct->ls_lvb_size = min_lvb_size;
-	lockstruct->ls_lockspace = (lm_lockspace_t *)nl;
+	lockstruct->ls_lockspace = nl;
 	lockstruct->ls_ops = &nolock_ops;
 	lockstruct->ls_flags = LM_LSFLAG_LOCAL;
 
 	return 0;
 }
 
-static void nolock_others_may_mount(lm_lockspace_t *lockspace)
+static void nolock_others_may_mount(void *lockspace)
 {
 }
 
-static void nolock_unmount(lm_lockspace_t *lockspace)
+static void nolock_unmount(void *lockspace)
 {
-	struct nolock_lockspace *nl = (struct nolock_lockspace *)lockspace;
+	struct nolock_lockspace *nl = lockspace;
 	kfree(nl);
 }
 
-static void nolock_withdraw(lm_lockspace_t *lockspace)
+static void nolock_withdraw(void *lockspace)
 {
 }
 
@@ -80,10 +80,10 @@ static void nolock_withdraw(lm_lockspace_t *lockspace)
  * Returns: 0 on success, -EXXX on failure
  */
 
-static int nolock_get_lock(lm_lockspace_t *lockspace, struct lm_lockname *name,
-			   lm_lock_t **lockp)
+static int nolock_get_lock(void *lockspace, struct lm_lockname *name,
+			   void **lockp)
 {
-	*lockp = (lm_lock_t *)lockspace;
+	*lockp = lockspace;
 	return 0;
 }
 
@@ -93,7 +93,7 @@ static int nolock_get_lock(lm_lockspace_t *lockspace, struct lm_lockname *name,
  *
  */
 
-static void nolock_put_lock(lm_lock_t *lock)
+static void nolock_put_lock(void *lock)
 {
 }
 
@@ -107,7 +107,7 @@ static void nolock_put_lock(lm_lock_t *lock)
  * Returns: A bitmap of LM_OUT_*
  */
 
-static unsigned int nolock_lock(lm_lock_t *lock, unsigned int cur_state,
+static unsigned int nolock_lock(void *lock, unsigned int cur_state,
 				unsigned int req_state, unsigned int flags)
 {
 	return req_state | LM_OUT_CACHEABLE;
@@ -121,12 +121,12 @@ static unsigned int nolock_lock(lm_lock_t *lock, unsigned int cur_state,
  * Returns: 0
  */
 
-static unsigned int nolock_unlock(lm_lock_t *lock, unsigned int cur_state)
+static unsigned int nolock_unlock(void *lock, unsigned int cur_state)
 {
 	return 0;
 }
 
-static void nolock_cancel(lm_lock_t *lock)
+static void nolock_cancel(void *lock)
 {
 }
 
@@ -138,9 +138,9 @@ static void nolock_cancel(lm_lock_t *lock)
  * Returns: 0 on success, -EXXX on failure
  */
 
-static int nolock_hold_lvb(lm_lock_t *lock, char **lvbp)
+static int nolock_hold_lvb(void *lock, char **lvbp)
 {
-	struct nolock_lockspace *nl = (struct nolock_lockspace *)lock;
+	struct nolock_lockspace *nl = lock;
 	int error = 0;
 
 	*lvbp = kzalloc(nl->nl_lvb_size, GFP_KERNEL);
@@ -157,12 +157,12 @@ static int nolock_hold_lvb(lm_lock_t *lock, char **lvbp)
  *
  */
 
-static void nolock_unhold_lvb(lm_lock_t *lock, char *lvb)
+static void nolock_unhold_lvb(void *lock, char *lvb)
 {
 	kfree(lvb);
 }
 
-static int nolock_plock_get(lm_lockspace_t *lockspace, struct lm_lockname *name,
+static int nolock_plock_get(void *lockspace, struct lm_lockname *name,
 			    struct file *file, struct file_lock *fl)
 {
 	struct file_lock tmp;
@@ -176,7 +176,7 @@ static int nolock_plock_get(lm_lockspace_t *lockspace, struct lm_lockname *name,
 	return 0;
 }
 
-static int nolock_plock(lm_lockspace_t *lockspace, struct lm_lockname *name,
+static int nolock_plock(void *lockspace, struct lm_lockname *name,
 			struct file *file, int cmd, struct file_lock *fl)
 {
 	int error;
@@ -184,7 +184,7 @@ static int nolock_plock(lm_lockspace_t *lockspace, struct lm_lockname *name,
 	return error;
 }
 
-static int nolock_punlock(lm_lockspace_t *lockspace, struct lm_lockname *name,
+static int nolock_punlock(void *lockspace, struct lm_lockname *name,
 			  struct file *file, struct file_lock *fl)
 {
 	int error;
@@ -192,12 +192,12 @@ static int nolock_punlock(lm_lockspace_t *lockspace, struct lm_lockname *name,
 	return error;
 }
 
-static void nolock_recovery_done(lm_lockspace_t *lockspace, unsigned int jid,
+static void nolock_recovery_done(void *lockspace, unsigned int jid,
 				 unsigned int message)
 {
 }
 
-static struct lm_lockops nolock_ops = {
+static const struct lm_lockops nolock_ops = {
 	.lm_proto_name = "lock_nolock",
 	.lm_mount = nolock_mount,
 	.lm_others_may_mount = nolock_others_may_mount,