1 files changed, 21 insertions, 1 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-helpers.h b/drivers/net/wireless/iwlwifi/iwl-helpers.h
index 8993cca81b40..a443472bea62 100644
--- a/drivers/net/wireless/iwlwifi/iwl-helpers.h
+++ b/drivers/net/wireless/iwlwifi/iwl-helpers.h
@@ -1,6 +1,6 @@
 /******************************************************************************
  *
- * Copyright(c) 2003 - 2007 Intel Corporation. All rights reserved.
+ * Copyright(c) 2003 - 2008 Intel Corporation. All rights reserved.
  *
  * Portions of this file are derived from the ipw3945 project, as well
  * as portions of the ieee80211 subsystem header files.
@@ -254,6 +254,26 @@ static inline u8 iwl_get_dma_hi_address(dma_addr_t addr)
         return sizeof(addr) > sizeof(u32) ? (addr >> 16) >> 16 : 0;
 }
 
+/**
+ * iwl_queue_inc_wrap - increment queue index, wrap back to beginning
+ * @index -- current index
+ * @n_bd -- total number of entries in queue (must be power of 2)
+ */
+static inline int iwl_queue_inc_wrap(int index, int n_bd)
+{
+        return ++index & (n_bd - 1);
+}
+
+/**
+ * iwl_queue_dec_wrap - decrement queue index, wrap back to end
+ * @index -- current index
+ * @n_bd -- total number of entries in queue (must be power of 2)
+ */
+static inline int iwl_queue_dec_wrap(int index, int n_bd)
+{
+        return --index & (n_bd - 1);
+}
+
 /* TODO: Move fw_desc functions to iwl-pci.ko */
 static inline void iwl_free_fw_desc(struct pci_dev *pci_dev,
                                     struct fw_desc *desc)