Add detection of ktime_get_real_ts64 vs getnstimeofday

Signed-off-by: Kozlowski Mateusz <mateusz.kozlowski@intel.com>

configure.d/1_timekeeping.conf

@@ -0,0 +1,31 @@
+#!/bin/bash
+#
+# Copyright(c) 2012-2021 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 "ktime_get_real_ts64(NULL)" "linux/ktime.h"
+	then
+		echo $cur_name "1" >> $config_file_path
+	else
+		echo $cur_name "2" >> $config_file_path
+    fi
+}
+
+apply() {
+    case "$1" in
+    "1")
+		add_define "CAS_GET_CURRENT_TIME(timespec) ktime_get_real_ts64(timespec)" ;;
+    "2")
+		add_define "CAS_GET_CURRENT_TIME(timespec) getnstimeofday(timespec)" ;;
+    *)
+        exit 1
+    esac
+}
+
+conf_run $@

modules/cas_cache/linux_kernel_version.h

@@ -39,7 +39,7 @@
 #include <linux/ratelimit.h>
 #include <linux/mm.h>
 #include <linux/blk-mq.h>
-#include <linux/time.h>
+#include <linux/ktime.h>
 
 #include "generated_defines.h"
 

modules/cas_cache/ocf_env.h

@@ -533,14 +533,14 @@ static inline void env_cond_resched(void)
 
 static inline int env_in_interrupt(void)
 {
-	return in_interrupt();;
+	return in_interrupt();
 }
 
 /* *** TIME *** */
 static inline uint64_t env_get_tick_count(void)
 {
-	struct timespec ts;
+	struct timespec64 ts;
-	getnstimeofday(&ts);
+	CAS_GET_CURRENT_TIME(&ts);
 	return ts.tv_sec * 1000000000UL + ts.tv_nsec;
 }