Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / staging / lustre / include / linux / libcfs / linux / linux-time.h

diff --git a/kernel/drivers/staging/lustre/include/linux/libcfs/linux/linux-time.h b/kernel/drivers/staging/lustre/include/linux/libcfs/linux/linux-time.h
new file mode 100644 (file)
index 0000000..0fc490b
--- /dev/null
+++ b/kernel/drivers/staging/lustre/include/linux/libcfs/linux/linux-time.h
@@ -0,0 +1,144 @@
+/*
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * libcfs/include/libcfs/linux/linux-time.h
+ *
+ * Implementation of portable time API for Linux (kernel and user-level).
+ *
+ * Author: Nikita Danilov <nikita@clusterfs.com>
+ */
+
+#ifndef __LIBCFS_LINUX_LINUX_TIME_H__
+#define __LIBCFS_LINUX_LINUX_TIME_H__
+
+#ifndef __LIBCFS_LIBCFS_H__
+#error Do not #include this file directly. #include <linux/libcfs/libcfs.h> instead
+#endif
+
+#define ONE_BILLION ((u_int64_t)1000000000)
+#define ONE_MILLION 1000000
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/time.h>
+#include <asm/div64.h>
+
+/*
+ * post 2.5 kernels.
+ */
+
+#include <linux/jiffies.h>
+
+
+static inline void cfs_fs_time_usec(struct timespec *t, struct timeval *v)
+{
+       v->tv_sec  = t->tv_sec;
+       v->tv_usec = t->tv_nsec / 1000;
+}
+
+/*
+ * Generic kernel stuff
+ */
+
+static inline unsigned long cfs_time_current(void)
+{
+       return jiffies;
+}
+
+static inline void cfs_fs_time_current(struct timespec *t)
+{
+       *t = CURRENT_TIME;
+}
+
+static inline time_t cfs_fs_time_sec(struct timespec *t)
+{
+       return t->tv_sec;
+}
+
+static inline long cfs_time_seconds(int seconds)
+{
+       return ((long)seconds) * HZ;
+}
+
+static inline time_t cfs_duration_sec(long d)
+{
+       return d / HZ;
+}
+
+static inline void cfs_duration_usec(long d, struct timeval *s)
+{
+#if (BITS_PER_LONG == 32) && (HZ > 4096)
+       __u64 t;
+
+       s->tv_sec = d / HZ;
+       t = (d - (long)s->tv_sec * HZ) * ONE_MILLION;
+       do_div(t, HZ);
+       s->tv_usec = t;
+#else
+       s->tv_sec = d / HZ;
+       s->tv_usec = ((d - (long)s->tv_sec * HZ) * ONE_MILLION) / HZ;
+#endif
+}
+
+#define cfs_time_current_64 get_jiffies_64
+
+static inline __u64 cfs_time_add_64(__u64 t, __u64 d)
+{
+       return t + d;
+}
+
+static inline __u64 cfs_time_shift_64(int seconds)
+{
+       return cfs_time_add_64(cfs_time_current_64(),
+                              cfs_time_seconds(seconds));
+}
+
+static inline int cfs_time_before_64(__u64 t1, __u64 t2)
+{
+       return (__s64)t2 - (__s64)t1 > 0;
+}
+
+static inline int cfs_time_beforeq_64(__u64 t1, __u64 t2)
+{
+       return (__s64)t2 - (__s64)t1 >= 0;
+}
+
+/*
+ * One jiffy
+ */
+#define CFS_TICK               (1)
+
+#define CFS_TIME_T           "%lu"
+#define CFS_DURATION_T   "%ld"
+
+#endif /* __LIBCFS_LINUX_LINUX_TIME_H__ */