staging: csr: oska: remove refcount.c

It's not called by anyone, so remove it and the .h file and don't export
the functions as they are not around anymore.

Cc: Mikko Virkkilä <mikko.virkkila@bluegiga.com>
Cc: Lauri Hintsala <Lauri.Hintsala@bluegiga.com>
Cc: Riku Mettälä <riku.mettala@bluegiga.com>
Cc: Veli-Pekka Peltola <veli-pekka.peltola@bluegiga.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/csr/oska/Makefile

@@ -2,7 +2,6 @@ obj-$(CONFIG_CSR_WIFI) := csr_oska.o
 
 csr_oska-y := \
        list.o \
-       refcount.o \
        event.o \
        oska_module.o \
        print.o  \

drivers/staging/csr/oska/oska_module.c

@@ -8,14 +8,6 @@
  */
 #include <linux/module.h>
 
-#include "all.h"
-#include "refcount.h"
-
-EXPORT_SYMBOL(os_refcount_init);
-EXPORT_SYMBOL(os_refcount_destroy);
-EXPORT_SYMBOL(os_refcount_get);
-EXPORT_SYMBOL(os_refcount_put);
-
 MODULE_DESCRIPTION("Operating System Kernel Abstraction");
 MODULE_AUTHOR("Cambridge Silicon Radio Ltd.");
 MODULE_LICENSE("GPL and additional rights");

drivers/staging/csr/oska/refcount.c

-/*
- * OSKA generic implementation -- reference counting.
- *
- * Copyright (C) 2010 Cambridge Silicon Radio Ltd.
- *
- * Refer to LICENSE.txt included with this source code for details on
- * the license terms.
- */
-#include "refcount.h"
-#include "types.h"
-
-void os_refcount_init(os_refcount_t *refcount, os_refcount_callback_f func, void *arg)
-{
-    os_spinlock_init(&refcount->lock);
-    refcount->count = 1;
-    refcount->func  = func;
-    refcount->arg   = arg;
-}
-
-void os_refcount_destroy(os_refcount_t *refcount)
-{
-    os_spinlock_destroy(&refcount->lock);
-}
-
-void os_refcount_get(os_refcount_t *refcount)
-{
-    os_int_status_t istate;
-
-    os_spinlock_lock_intsave(&refcount->lock, &istate);
-    refcount->count++;
-    os_spinlock_unlock_intrestore(&refcount->lock, &istate);
-}
-
-void os_refcount_put(os_refcount_t *refcount)
-{
-    bool is_zero;
-    os_int_status_t istate;
-
-    os_spinlock_lock_intsave(&refcount->lock, &istate);
-    refcount->count--;
-    is_zero = refcount->count == 0;
-    os_spinlock_unlock_intrestore(&refcount->lock, &istate);
-
-    if (is_zero) {
-        refcount->func(refcount->arg);
-    }
-}

drivers/staging/csr/oska/refcount.h

-/*
- * Operating system kernel abstraction -- reference counting.
- *
- * Copyright (C) 2010 Cambridge Silicon Radio Ltd.
- *
- * Refer to LICENSE.txt included with this source code for details on
- * the license terms.
- */
-#ifndef __OSKA_REFCOUNT_H
-#define __OSKA_REFCOUNT_H
-
-#include "spinlock.h"
-
-/**
- * @defgroup refcount Reference Counting
- *
- * A reference count is an atomic counter.  A callback function is
- * called whenever the count reaches zero.
- *
- * A generic implementation is provided that is suitable for all
- * platforms that support the spinlock API in <oska/spinlock.h> (see
- * \ref spinlock).
- */
-
-typedef void (*os_refcount_callback_f)(void *arg);
-
-struct __os_refcount_impl {
-    unsigned count;
-    os_spinlock_t lock;
-    os_refcount_callback_f func;
-    void *arg;
-};
-
-/**
- * A reference count object.
- *
- * @ingroup refcount
- */
-typedef struct __os_refcount_impl os_refcount_t;
-
-/**
- * Initialize a reference count to 1.
- *
- * Initialized reference counts must be destroyed by calling
- * os_refcount_destroy().
- *
- * @param refcount the reference count.
- * @param func     the function which will be called when the
- *                 reference count reaches 0.
- * @param arg      an argument to pass to func.
- *
- * @ingroup refcount
- */
-void os_refcount_init(os_refcount_t *refcount, os_refcount_callback_f func, void *arg);
-
-/**
- * Destroy a reference count object.
- *
- * @param refcount the reference count.
- *
- * @ingroup refcount
- */
-void os_refcount_destroy(os_refcount_t *refcount);
-
-/**
- * Atomically increase the reference count by 1.
- *
- * @param refcount the reference count.
- *
- * @ingroup refcount
- */
-void os_refcount_get(os_refcount_t *refcount);
-
-/**
- * Atomically decrease the reference count by 1.
- *
- * The callback function passed to the call to os_refcount_init() is
- * called if the count was decreased to zero.
- *
- * @param refcount the reference count.
- *
- * @ingroup refcount
- */
-void os_refcount_put(os_refcount_t *refcount);
-
-#endif /* #ifndef __OSKA_REFCOUNT_H */