qcacmn: Avoid compilation issue with kernel 4.19

There is a compilation issue if a variable is passed to
kernel api DECLARE_HASHTABLE.
TO resolve this issue, instead of passing a variable
pass a constant to DECLARE_HASHTABLE.

Change-Id: Ie9782af541bb34cc50f79060b0007dc73881e5f4
CRs-Fixed: 2386893

qdf/inc/qdf_hashtable.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2018-2019 The Linux Foundation. All rights reserved.
  *
  * Permission to use, copy, modify, and/or distribute this software for
  * any purpose with or without fee is hereby granted, provided that the
@@ -38,7 +38,9 @@
 /**
  * qdf_ht_declare() - declare a new qdf_ht
  * @name: variable name of the hashtable to declare
- * @bits: number of hash bits to use; buckets=2^bits
+ * @bits: number of hash bits to use; buckets=2^bits; Needs to be a compile
+ *        time constant
+ *
  */
 #define qdf_ht_declare(name, bits) __qdf_ht_declare(name, bits)
 

qdf/test/qdf_hashtable_test.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2018-2019 The Linux Foundation. All rights reserved.
  *
  * Permission to use, copy, modify, and/or distribute this software for
  * any purpose with or without fee is hereby granted, provided that the
@@ -20,6 +20,9 @@
 #include "qdf_hashtable_test.h"
 #include "qdf_trace.h"
 
+/* 16 buckets */
+#define QDF_HT_HASH_BITS 4
+
 struct qdf_ht_test_item {
 	struct qdf_ht_entry entry;
 	uintptr_t key;
@@ -27,12 +30,12 @@ struct qdf_ht_test_item {
 
 static uint32_t qdf_ht_test_single(void)
 {
-	const int bits = 4; /* 16 buckets */
+	const int bits = QDF_HT_HASH_BITS;
 	struct qdf_ht_test_item item = { .key = (uintptr_t)&bits };
 	struct qdf_ht_test_item *cursor;
 	int i, count;
 
-	qdf_ht_declare(ht, bits);
+	qdf_ht_declare(ht, QDF_HT_HASH_BITS);
 
 	qdf_ht_init(ht);
 	qdf_ht_add(ht, &item.entry, item.key);