staging: tidspbridge: remove dmm_init() and dmm_exit()

The dmm module has a dmm_init() and a dmm_exit() whose only purpose is
to keep a reference counting which is not used at all.

This patch removes these functions and the reference count variable.

There is no functional changes.

Signed-off-by: Víctor Manuel Jáquez Leal <vjaquez@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/tidspbridge/include/dspbridge/dmm.h

@@ -61,10 +61,6 @@ extern int dmm_create(struct dmm_object **dmm_manager,
 			     struct dev_object *hdev_obj,
 			     const struct dmm_mgrattrs *mgr_attrts);
 
-extern bool dmm_init(void);
-
-extern void dmm_exit(void);
-
 extern int dmm_create_tables(struct dmm_object *dmm_mgr,
 				    u32 addr, u32 size);
 

drivers/staging/tidspbridge/pmgr/dev.c

@@ -657,9 +657,6 @@ int dev_get_bridge_context(struct dev_object *hdev_obj,
 void dev_exit(void)
 {
 	refs--;
-
-	if (refs == 0)
-		dmm_exit();
 }
 
 /*
@@ -671,9 +668,6 @@ bool dev_init(void)
 {
 	bool ret = true;
 
-	if (refs == 0)
-		dmm_init();
-
 	if (ret)
 		refs++;
 

drivers/staging/tidspbridge/pmgr/dmm.c

@@ -51,8 +51,6 @@ struct dmm_object {
 	spinlock_t dmm_lock;	/* Lock to access dmm mgr */
 };
 
-/*  ----------------------------------- Globals */
-static u32 refs;		/* module reference count */
 struct map_page {
 	u32 region_size:15;
 	u32 mapped_size:15;
@@ -171,18 +169,6 @@ int dmm_delete_tables(struct dmm_object *dmm_mgr)
 	return status;
 }
 
-/*
- *  ======== dmm_exit ========
- *  Purpose:
- *      Discontinue usage of module; free resources when reference count
- *      reaches 0.
- */
-void dmm_exit(void)
-{
-
-	refs--;
-}
-
 /*
  *  ======== dmm_get_handle ========
  *  Purpose:
@@ -205,24 +191,6 @@ int dmm_get_handle(void *hprocessor, struct dmm_object **dmm_manager)
 	return status;
 }
 
-/*
- *  ======== dmm_init ========
- *  Purpose:
- *      Initializes private state of DMM module.
- */
-bool dmm_init(void)
-{
-	bool ret = true;
-
-	if (ret)
-		refs++;
-
-	virtual_mapping_table = NULL;
-	table_size = 0;
-
-	return ret;
-}
-
 /*
  *  ======== dmm_map_memory ========
  *  Purpose: