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LU-12931 libcfs: skip cfs_time_seconds() indirection
[fs/lustre-release.git] / libcfs / include / libcfs / linux / linux-time.h
index 055b166..454f37e 100644 (file)
 #ifndef __LIBCFS_LINUX_LINUX_TIME_H__
 #define __LIBCFS_LINUX_LINUX_TIME_H__
 
-#ifndef __LIBCFS_LIBCFS_H__
-#error Do not #include this file directly. #include <libcfs/libcfs.h> instead
-#endif
-
-#ifndef __KERNEL__
-#error This include is only for kernel use.
-#endif
-
 /* Portable time API */
-
-/*
- * Platform provides three opaque data-types:
- *
- *  cfs_time_t        represents point in time. This is internal kernel
- *                    time rather than "wall clock". This time bears no
- *                    relation to gettimeofday().
- *
- *  cfs_duration_t    represents time interval with resolution of internal
- *                    platform clock
- *
- *  cfs_time_t     cfs_time_current(void);
- *  cfs_time_t     cfs_time_add    (cfs_time_t, cfs_duration_t);
- *  cfs_duration_t cfs_time_sub    (cfs_time_t, cfs_time_t);
- *
- *  time_t         cfs_duration_sec (cfs_duration_t);
- */
-
+#include <linux/hrtimer.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/version.h>
 /*
  * Generic kernel stuff
  */
-
-typedef unsigned long cfs_time_t;      /* jiffies */
-typedef long cfs_duration_t;
-
 #ifndef HAVE_TIMESPEC64
 
 typedef __s64 time64_t;
@@ -127,6 +98,26 @@ static inline struct timespec timespec64_to_timespec(const struct timespec64 ts6
 
 #endif /* HAVE_TIMESPEC64 */
 
+#ifndef HAVE_NS_TO_TIMESPEC64
+static inline struct timespec64 ns_to_timespec64(const s64 nsec)
+{
+       struct timespec64 ts;
+       s32 rem;
+
+       if (!nsec)
+               return (struct timespec64) {0, 0};
+
+       ts.tv_sec = div_s64_rem(nsec, NSEC_PER_SEC, &rem);
+       if (unlikely(rem < 0)) {
+               ts.tv_sec--;
+               rem += NSEC_PER_SEC;
+       }
+       ts.tv_nsec = rem;
+
+       return ts;
+}
+#endif
+
 #ifndef HAVE_KTIME_ADD
 # define ktime_add(lhs, rhs) ({ (ktime_t){ .tv64 = (lhs).tv64 + (rhs).tv64 }; })
 #endif /* !HAVE_KTIME_ADD */
@@ -221,57 +212,40 @@ static inline ktime_t timespec64_to_ktime(struct timespec64 ts)
 }
 #endif
 
-static inline int cfs_time_before(cfs_time_t t1, cfs_time_t t2)
+static inline unsigned long cfs_time_seconds(time64_t seconds)
 {
-        return time_before(t1, t2);
+       return nsecs_to_jiffies64(seconds * NSEC_PER_SEC);
 }
 
-static inline int cfs_time_beforeq(cfs_time_t t1, cfs_time_t t2)
-{
-        return time_before_eq(t1, t2);
-}
+#ifdef HAVE_NEW_DEFINE_TIMER
+# ifndef TIMER_DATA_TYPE
+# define TIMER_DATA_TYPE struct timer_list *
+# endif
 
-static inline cfs_time_t cfs_time_current(void)
-{
-        return jiffies;
-}
-
-static inline time_t cfs_time_current_sec(void)
-{
-       return get_seconds();
-}
-
-static inline cfs_duration_t cfs_time_seconds(int seconds)
-{
-       return ((cfs_duration_t)seconds) * msecs_to_jiffies(MSEC_PER_SEC);
-}
-
-static inline time_t cfs_duration_sec(cfs_duration_t d)
-{
-       return d / msecs_to_jiffies(MSEC_PER_SEC);
-}
-
-#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));
-}
+#define CFS_DEFINE_TIMER(_name, _function, _expires, _data) \
+       DEFINE_TIMER((_name), (_function))
+#else
+# ifndef TIMER_DATA_TYPE
+# define TIMER_DATA_TYPE unsigned long
+# endif
 
-static inline int cfs_time_before_64(__u64 t1, __u64 t2)
-{
-        return (__s64)t2 - (__s64)t1 > 0;
-}
+#define CFS_DEFINE_TIMER(_name, _function, _expires, _data) \
+       DEFINE_TIMER((_name), (_function), (_expires), (_data))
+#endif
 
-static inline int cfs_time_beforeq_64(__u64 t1, __u64 t2)
-{
-        return (__s64)t2 - (__s64)t1 >= 0;
-}
+#ifdef HAVE_TIMER_SETUP
+#define cfs_timer_cb_arg_t struct timer_list *
+#define cfs_from_timer(var, callback_timer, timer_fieldname) \
+       from_timer(var, callback_timer, timer_fieldname)
+#define cfs_timer_setup(timer, callback, data, flags) \
+       timer_setup((timer), (callback), (flags))
+#define cfs_timer_cb_arg(var, timer_fieldname) (&(var)->timer_fieldname)
+#else
+#define cfs_timer_cb_arg_t unsigned long
+#define cfs_from_timer(var, data, timer_fieldname) (typeof(var))(data)
+#define cfs_timer_setup(timer, callback, data, flags) \
+       setup_timer((timer), (callback), (data))
+#define cfs_timer_cb_arg(var, timer_fieldname) (cfs_timer_cb_arg_t)(var)
+#endif
 
 #endif /* __LIBCFS_LINUX_LINUX_TIME_H__ */