configure: Add __vmalloc() wrapper

Signed-off-by: Robert Baldyga <robert.baldyga@intel.com>

configure.d/1_vmalloc.conf

@@ -0,0 +1,42 @@
+#!/bin/bash
+#
+# Copyright(c) 2012-2020 Intel Corporation
+# SPDX-License-Identifier: BSD-3-Clause-Clear
+#
+
+. $(dirname $3)/conf_framework
+
+check() {
+    cur_name=$(basename $2)
+    config_file_path=$1
+    if compile_module $cur_name "__vmalloc(0, 0);" "linux/vmalloc.h"
+    then
+        echo $cur_name "1" >> $config_file_path
+    elif compile_module $cur_name "struct pgprot x; __vmalloc(0, 0, x);" "linux/vmalloc.h"
+    then
+        echo $cur_name "2" >> $config_file_path
+    else
+        echo $cur_name "X" >> $config_file_path
+    fi
+}
+
+apply() {
+    case "$1" in
+    "1")
+        add_function "
+        static inline void *cas_vmalloc(unsigned long size, gfp_t gfp_mask)
+        {
+            return __vmalloc(size, gfp_mask);
+        }" ;;
+    "2")
+        add_function "
+        static inline void *cas_vmalloc(unsigned long size, gfp_t gfp_mask)
+        {
+            return __vmalloc(size, gfp_mask, PAGE_KERNEL);
+        }" ;;
+    *)
+        exit 1
+    esac
+}
+
+conf_run $@

modules/cas_cache/ocf_env.h

@@ -41,7 +41,7 @@ static inline void env_free(const void *ptr)
 
 static inline void *env_vmalloc_flags(size_t size, int flags)
 {
-	return __vmalloc(size, flags | __GFP_HIGHMEM, PAGE_KERNEL);
+	return cas_vmalloc(size, flags | __GFP_HIGHMEM);
 }
 
 static inline void *env_vzalloc_flags(size_t size, int flags)

modules/cas_cache/utils/utils_mpool.c

@@ -77,17 +77,18 @@ static env_allocator *cas_mpool_get_allocator(
 
 void *cas_mpool_new_f(struct cas_mpool *mpool, uint32_t count, int flags)
 {
+	unsigned long size;
 	void *items = NULL;
 	env_allocator *allocator;
 
 	allocator = cas_mpool_get_allocator(mpool, count);
 
-	if (allocator)
+	if (allocator) {
 		items = env_allocator_new(allocator);
-	else
+	} else {
-		items = __vmalloc(mpool->hdr_size + (mpool->item_size * count),
+		size = mpool->hdr_size + (mpool->item_size * count);
-				flags | __GFP_ZERO | __GFP_HIGHMEM,
+		items = cas_vmalloc(size, flags | __GFP_ZERO | __GFP_HIGHMEM);
-				PAGE_KERNEL);
+	}
 
 #ifdef ZERO_OR_NULL_PTR
 	if (ZERO_OR_NULL_PTR(items))