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Simplify the time compatibility wrappers

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Many of the time functions had grown overly complex in order to
handle kernel compatibility issues.  However, as of Linux 2.6.26
all the required functionality is available.  This allows us to
retire numerous configure checks and greatly simplify the time
compatibility wrappers.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
This commit is contained in:
Brian Behlendorf
2014-09-30 18:48:25 -04:00
parent 87f8055a91
commit 82f2f1a3af
7 changed files with 36 additions and 279 deletions
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include/sys/time.h
+36 -53
View File
@@ -23,74 +23,57 @@
\*****************************************************************************/
#ifndef _SPL_TIME_H
#define _SPL_TIME_H
#define _SPL_TIME_H
/*
* Structure returned by gettimeofday(2) system call,
* and used in other calls.
*/
#include <linux/module.h>
#include <linux/time.h>
#include <sys/types.h>
#include <sys/timer.h>
#if defined(CONFIG_64BIT)
#define TIME_MAX INT64_MAX
#define TIME_MIN INT64_MIN
#define TIME_MAX INT64_MAX
#define TIME_MIN INT64_MIN
#else
#define TIME_MAX INT32_MAX
#define TIME_MIN INT32_MIN
#define TIME_MAX INT32_MAX
#define TIME_MIN INT32_MIN
#endif
#define SEC 1
#define MILLISEC 1000
#define MICROSEC 1000000
#define NANOSEC 1000000000
#define SEC 1
#define MILLISEC 1000
#define MICROSEC 1000000
#define NANOSEC 1000000000
#define MSEC2NSEC(m) ((hrtime_t)(m) * (NANOSEC / MILLISEC))
#define NSEC2MSEC(n) ((n) / (NANOSEC / MILLISEC))
/* Already defined in include/linux/time.h */
#undef CLOCK_THREAD_CPUTIME_ID
#undef CLOCK_REALTIME
#undef CLOCK_MONOTONIC
#undef CLOCK_PROCESS_CPUTIME_ID
#define hz HZ
typedef enum clock_type {
__CLOCK_REALTIME0 = 0, /* obsolete; same as CLOCK_REALTIME */
CLOCK_VIRTUAL = 1, /* thread's user-level CPU clock */
CLOCK_THREAD_CPUTIME_ID = 2, /* thread's user+system CPU clock */
CLOCK_REALTIME = 3, /* wall clock */
CLOCK_MONOTONIC = 4, /* high resolution monotonic clock */
CLOCK_PROCESS_CPUTIME_ID = 5, /* process's user+system CPU clock */
CLOCK_HIGHRES = CLOCK_MONOTONIC, /* alternate name */
CLOCK_PROF = CLOCK_THREAD_CPUTIME_ID,/* alternate name */
} clock_type_t;
#define hz \
({ \
ASSERT(HZ >= 100 && HZ <= MICROSEC); \
HZ; \
})
extern void __gethrestime(timestruc_t *);
extern int __clock_gettime(clock_type_t, timespec_t *);
extern hrtime_t __gethrtime(void);
#define gethrestime(ts) __gethrestime(ts)
#define clock_gettime(fl, tp) __clock_gettime(fl, tp)
#define gethrtime() __gethrtime()
static __inline__ time_t
gethrestime_sec(void)
{
timestruc_t now;
__gethrestime(&now);
return now.tv_sec;
}
#define TIMESPEC_OVERFLOW(ts) \
#define TIMESPEC_OVERFLOW(ts) \
((ts)->tv_sec < TIME_MIN || (ts)->tv_sec > TIME_MAX)
static inline void
gethrestime(timestruc_t *now)
{
struct timespec ts;
getnstimeofday(&ts);
now->tv_sec = ts.tv_sec;
now->tv_nsec = ts.tv_nsec;
}
static inline time_t
gethrestime_sec(void)
{
struct timespec ts;
getnstimeofday(&ts);
return (ts.tv_sec);
}
static inline hrtime_t
gethrtime(void)
{
struct timespec now;
getrawmonotonic(&now);
return (((hrtime_t)now.tv_sec * NSEC_PER_SEC) + now.tv_nsec);
}
#endif /* _SPL_TIME_H */
include/sys/types.h
-1
View File
@@ -31,7 +31,6 @@
#include <linux/uaccess_compat.h>
#include <linux/file_compat.h>
#include <linux/list_compat.h>
#include <linux/time_compat.h>
#include <linux/bitops_compat.h>
#include <linux/smp_compat.h>
#include <linux/kallsyms_compat.h>