diff --git a/configure.d/1_global_page_state.conf b/configure.d/1_global_page_state.conf
index 7c74b44..37460e4 100644
--- a/configure.d/1_global_page_state.conf
+++ b/configure.d/1_global_page_state.conf
@@ -9,39 +9,30 @@
 check() {
 	cur_name=$(basename $2)
 	config_file_path=$1
-	if compile_module $cur_name "si_mem_available()" "linux/mm.h"
+	if compile_module $cur_name "global_zone_page_state(1)" "linux/mm.h"
 	then
 		echo $cur_name "1" >> $config_file_path
-
-	elif compile_module $cur_name "global_zone_page_state(1)" "linux/mm.h"
-	then
-		echo $cur_name "2" >> $config_file_path
 	elif compile_module $cur_name "global_page_state(1)" "linux/mm.h"
 	then
-		echo $cur_name "3" >> $config_file_path
-	else
-	    echo $cur_name "X" >> $config_file_path
-	fi
+		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 unsigned long cas_get_free_mem(void)
-		{	return si_mem_available() << PAGE_SHIFT;
+	static inline unsigned long cas_global_zone_page_state(enum zone_stat_item item)
+		{
+			return global_zone_page_state(item);
 		}" ;;
     "2")
 		add_function "
-	static inline unsigned long cas_get_free_mem(void)
+	static inline unsigned long cas_global_zone_page_state(enum zone_stat_item item)
 		{
-			return global_zone_page_state(NR_FREE_PAGES) << PAGE_SHIFT;
-		}" ;;
-    "3")
-		add_function "
-	static inline unsigned long cas_get_free_mem(void)
-		{
-			return global_page_state(NR_FREE_PAGES) << PAGE_SHIFT;
+			return global_page_state(item);
 		}" ;;
     *)
         exit 1
diff --git a/modules/cas_cache/ocf_env.h b/modules/cas_cache/ocf_env.h
index 6f1e2e3..040e40b 100644
--- a/modules/cas_cache/ocf_env.h
+++ b/modules/cas_cache/ocf_env.h
@@ -21,7 +21,7 @@
 
 static inline uint64_t env_get_free_memory(void)
 {
-	return cas_get_free_mem();
+	return cas_global_zone_page_state(NR_FREE_PAGES) << PAGE_SHIFT;
 }
 
 static inline void *env_malloc(size_t size, int flags)