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Merge commit 'ccbf62d8a2' into for-next

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backmerge to avoid kernel/acct.c conflict
This commit is contained in:
Al Viro 2014-08-07 14:07:57 -04:00
commit 82df9c8beb
75 changed files with 2513 additions and 1361 deletions
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16
include/linux/hrtimer.h
View file

@ -165,6 +165,7 @@ enum hrtimer_base_type {
* struct hrtimer_cpu_base - the per cpu clock bases
* @lock: lock protecting the base and associated clock bases
* and timers
* @cpu: cpu number
* @active_bases: Bitfield to mark bases with active timers
* @clock_was_set: Indicates that clock was set from irq context.
* @expires_next: absolute time of the next event which was scheduled
@ -179,6 +180,7 @@ enum hrtimer_base_type {
*/
struct hrtimer_cpu_base {
raw_spinlock_t lock;
unsigned int cpu;
unsigned int active_bases;
unsigned int clock_was_set;
#ifdef CONFIG_HIGH_RES_TIMERS
@ -324,14 +326,6 @@ static inline void timerfd_clock_was_set(void) { }
#endif
extern void hrtimers_resume(void);
extern ktime_t ktime_get(void);
extern ktime_t ktime_get_real(void);
extern ktime_t ktime_get_boottime(void);
extern ktime_t ktime_get_monotonic_offset(void);
extern ktime_t ktime_get_clocktai(void);
extern ktime_t ktime_get_update_offsets(ktime_t *offs_real, ktime_t *offs_boot,
ktime_t *offs_tai);
DECLARE_PER_CPU(struct tick_device, tick_cpu_device);
@ -452,12 +446,6 @@ extern void hrtimer_run_pending(void);
/* Bootup initialization: */
extern void __init hrtimers_init(void);
#if BITS_PER_LONG < 64
extern u64 ktime_divns(const ktime_t kt, s64 div);
#else /* BITS_PER_LONG < 64 */
# define ktime_divns(kt, div) (u64)((kt).tv64 / (div))
#endif
/* Show pending timers: */
extern void sysrq_timer_list_show(void);

2
include/linux/io.h
View file

@ -58,6 +58,8 @@ static inline void devm_ioport_unmap(struct device *dev, void __iomem *addr)
}
#endif
#define IOMEM_ERR_PTR(err) (__force void __iomem *)ERR_PTR(err)
void __iomem *devm_ioremap(struct device *dev, resource_size_t offset,
unsigned long size);
void __iomem *devm_ioremap_nocache(struct device *dev, resource_size_t offset,

228
include/linux/ktime.h
View file

@ -27,43 +27,19 @@
/*
* ktime_t:
*
* On 64-bit CPUs a single 64-bit variable is used to store the hrtimers
* A single 64-bit variable is used to store the hrtimers
* internal representation of time values in scalar nanoseconds. The
* design plays out best on 64-bit CPUs, where most conversions are
* NOPs and most arithmetic ktime_t operations are plain arithmetic
* operations.
*
* On 32-bit CPUs an optimized representation of the timespec structure
* is used to avoid expensive conversions from and to timespecs. The
* endian-aware order of the tv struct members is chosen to allow
* mathematical operations on the tv64 member of the union too, which
* for certain operations produces better code.
*
* For architectures with efficient support for 64/32-bit conversions the
* plain scalar nanosecond based representation can be selected by the
* config switch CONFIG_KTIME_SCALAR.
*/
union ktime {
s64 tv64;
#if BITS_PER_LONG != 64 && !defined(CONFIG_KTIME_SCALAR)
struct {
# ifdef __BIG_ENDIAN
s32 sec, nsec;
# else
s32 nsec, sec;
# endif
} tv;
#endif
};
typedef union ktime ktime_t; /* Kill this */
/*
* ktime_t definitions when using the 64-bit scalar representation:
*/
#if (BITS_PER_LONG == 64) || defined(CONFIG_KTIME_SCALAR)
/**
* ktime_set - Set a ktime_t variable from a seconds/nanoseconds value
* @secs: seconds to set
@ -71,13 +47,12 @@ typedef union ktime ktime_t; /* Kill this */
*
* Return: The ktime_t representation of the value.
*/
static inline ktime_t ktime_set(const long secs, const unsigned long nsecs)
static inline ktime_t ktime_set(const s64 secs, const unsigned long nsecs)
{
#if (BITS_PER_LONG == 64)
if (unlikely(secs >= KTIME_SEC_MAX))
return (ktime_t){ .tv64 = KTIME_MAX };
#endif
return (ktime_t) { .tv64 = (s64)secs * NSEC_PER_SEC + (s64)nsecs };
return (ktime_t) { .tv64 = secs * NSEC_PER_SEC + (s64)nsecs };
}
/* Subtract two ktime_t variables. rem = lhs -rhs: */
@ -108,6 +83,12 @@ static inline ktime_t timespec_to_ktime(struct timespec ts)
return ktime_set(ts.tv_sec, ts.tv_nsec);
}
/* convert a timespec64 to ktime_t format: */
static inline ktime_t timespec64_to_ktime(struct timespec64 ts)
{
return ktime_set(ts.tv_sec, ts.tv_nsec);
}
/* convert a timeval to ktime_t format: */
static inline ktime_t timeval_to_ktime(struct timeval tv)
{
@ -117,159 +98,15 @@ static inline ktime_t timeval_to_ktime(struct timeval tv)
/* Map the ktime_t to timespec conversion to ns_to_timespec function */
#define ktime_to_timespec(kt) ns_to_timespec((kt).tv64)
/* Map the ktime_t to timespec conversion to ns_to_timespec function */
#define ktime_to_timespec64(kt) ns_to_timespec64((kt).tv64)
/* Map the ktime_t to timeval conversion to ns_to_timeval function */
#define ktime_to_timeval(kt) ns_to_timeval((kt).tv64)
/* Convert ktime_t to nanoseconds - NOP in the scalar storage format: */
#define ktime_to_ns(kt) ((kt).tv64)
#else /* !((BITS_PER_LONG == 64) || defined(CONFIG_KTIME_SCALAR)) */
/*
* Helper macros/inlines to get the ktime_t math right in the timespec
* representation. The macros are sometimes ugly - their actual use is
* pretty okay-ish, given the circumstances. We do all this for
* performance reasons. The pure scalar nsec_t based code was nice and
* simple, but created too many 64-bit / 32-bit conversions and divisions.
*
* Be especially aware that negative values are represented in a way
* that the tv.sec field is negative and the tv.nsec field is greater
* or equal to zero but less than nanoseconds per second. This is the
* same representation which is used by timespecs.
*
* tv.sec < 0 and 0 >= tv.nsec < NSEC_PER_SEC
*/
/* Set a ktime_t variable to a value in sec/nsec representation: */
static inline ktime_t ktime_set(const long secs, const unsigned long nsecs)
{
return (ktime_t) { .tv = { .sec = secs, .nsec = nsecs } };
}
/**
* ktime_sub - subtract two ktime_t variables
* @lhs: minuend
* @rhs: subtrahend
*
* Return: The remainder of the subtraction.
*/
static inline ktime_t ktime_sub(const ktime_t lhs, const ktime_t rhs)
{
ktime_t res;
res.tv64 = lhs.tv64 - rhs.tv64;
if (res.tv.nsec < 0)
res.tv.nsec += NSEC_PER_SEC;
return res;
}
/**
* ktime_add - add two ktime_t variables
* @add1: addend1
* @add2: addend2
*
* Return: The sum of @add1 and @add2.
*/
static inline ktime_t ktime_add(const ktime_t add1, const ktime_t add2)
{
ktime_t res;
res.tv64 = add1.tv64 + add2.tv64;
/*
* performance trick: the (u32) -NSEC gives 0x00000000Fxxxxxxx
* so we subtract NSEC_PER_SEC and add 1 to the upper 32 bit.
*
* it's equivalent to:
* tv.nsec -= NSEC_PER_SEC
* tv.sec ++;
*/
if (res.tv.nsec >= NSEC_PER_SEC)
res.tv64 += (u32)-NSEC_PER_SEC;
return res;
}
/**
* ktime_add_ns - Add a scalar nanoseconds value to a ktime_t variable
* @kt: addend
* @nsec: the scalar nsec value to add
*
* Return: The sum of @kt and @nsec in ktime_t format.
*/
extern ktime_t ktime_add_ns(const ktime_t kt, u64 nsec);
/**
* ktime_sub_ns - Subtract a scalar nanoseconds value from a ktime_t variable
* @kt: minuend
* @nsec: the scalar nsec value to subtract
*
* Return: The subtraction of @nsec from @kt in ktime_t format.
*/
extern ktime_t ktime_sub_ns(const ktime_t kt, u64 nsec);
/**
* timespec_to_ktime - convert a timespec to ktime_t format
* @ts: the timespec variable to convert
*
* Return: A ktime_t variable with the converted timespec value.
*/
static inline ktime_t timespec_to_ktime(const struct timespec ts)
{
return (ktime_t) { .tv = { .sec = (s32)ts.tv_sec,
.nsec = (s32)ts.tv_nsec } };
}
/**
* timeval_to_ktime - convert a timeval to ktime_t format
* @tv: the timeval variable to convert
*
* Return: A ktime_t variable with the converted timeval value.
*/
static inline ktime_t timeval_to_ktime(const struct timeval tv)
{
return (ktime_t) { .tv = { .sec = (s32)tv.tv_sec,
.nsec = (s32)(tv.tv_usec *
NSEC_PER_USEC) } };
}
/**
* ktime_to_timespec - convert a ktime_t variable to timespec format
* @kt: the ktime_t variable to convert
*
* Return: The timespec representation of the ktime value.
*/
static inline struct timespec ktime_to_timespec(const ktime_t kt)
{
return (struct timespec) { .tv_sec = (time_t) kt.tv.sec,
.tv_nsec = (long) kt.tv.nsec };
}
/**
* ktime_to_timeval - convert a ktime_t variable to timeval format
* @kt: the ktime_t variable to convert
*
* Return: The timeval representation of the ktime value.
*/
static inline struct timeval ktime_to_timeval(const ktime_t kt)
{
return (struct timeval) {
.tv_sec = (time_t) kt.tv.sec,
.tv_usec = (suseconds_t) (kt.tv.nsec / NSEC_PER_USEC) };
}
/**
* ktime_to_ns - convert a ktime_t variable to scalar nanoseconds
* @kt: the ktime_t variable to convert
*
* Return: The scalar nanoseconds representation of @kt.
*/
static inline s64 ktime_to_ns(const ktime_t kt)
{
return (s64) kt.tv.sec * NSEC_PER_SEC + kt.tv.nsec;
}
#endif /* !((BITS_PER_LONG == 64) || defined(CONFIG_KTIME_SCALAR)) */
/**
* ktime_equal - Compares two ktime_t variables to see if they are equal
@ -328,16 +165,20 @@ static inline bool ktime_before(const ktime_t cmp1, const ktime_t cmp2)
return ktime_compare(cmp1, cmp2) < 0;
}
#if BITS_PER_LONG < 64
extern u64 ktime_divns(const ktime_t kt, s64 div);
#else /* BITS_PER_LONG < 64 */
# define ktime_divns(kt, div) (u64)((kt).tv64 / (div))
#endif
static inline s64 ktime_to_us(const ktime_t kt)
{
struct timeval tv = ktime_to_timeval(kt);
return (s64) tv.tv_sec * USEC_PER_SEC + tv.tv_usec;
return ktime_divns(kt, NSEC_PER_USEC);
}
static inline s64 ktime_to_ms(const ktime_t kt)
{
struct timeval tv = ktime_to_timeval(kt);
return (s64) tv.tv_sec * MSEC_PER_SEC + tv.tv_usec / USEC_PER_MSEC;
return ktime_divns(kt, NSEC_PER_MSEC);
}
static inline s64 ktime_us_delta(const ktime_t later, const ktime_t earlier)
@ -381,6 +222,25 @@ static inline __must_check bool ktime_to_timespec_cond(const ktime_t kt,
}
}
/**
* ktime_to_timespec64_cond - convert a ktime_t variable to timespec64
* format only if the variable contains data
* @kt: the ktime_t variable to convert
* @ts: the timespec variable to store the result in
*
* Return: %true if there was a successful conversion, %false if kt was 0.
*/
static inline __must_check bool ktime_to_timespec64_cond(const ktime_t kt,
struct timespec64 *ts)
{
if (kt.tv64) {
*ts = ktime_to_timespec64(kt);
return true;
} else {
return false;
}
}
/*
* The resolution of the clocks. The resolution value is returned in
* the clock_getres() system call to give application programmers an
@ -390,12 +250,6 @@ static inline __must_check bool ktime_to_timespec_cond(const ktime_t kt,
#define LOW_RES_NSEC TICK_NSEC
#define KTIME_LOW_RES (ktime_t){ .tv64 = LOW_RES_NSEC }
/* Get the monotonic time in timespec format: */
extern void ktime_get_ts(struct timespec *ts);
/* Get the real (wall-) time in timespec format: */
#define ktime_get_real_ts(ts) getnstimeofday(ts)
static inline ktime_t ns_to_ktime(u64 ns)
{
static const ktime_t ktime_zero = { .tv64 = 0 };
@ -410,4 +264,6 @@ static inline ktime_t ms_to_ktime(u64 ms)
return ktime_add_ms(ktime_zero, ms);
}
# include <linux/timekeeping.h>
#endif

11
include/linux/of_address.h
View file

@ -109,7 +109,12 @@ static inline bool of_dma_is_coherent(struct device_node *np)
extern int of_address_to_resource(struct device_node *dev, int index,
struct resource *r);
void __iomem *of_iomap(struct device_node *node, int index);
void __iomem *of_io_request_and_map(struct device_node *device,
int index, char *name);
#else
#include <linux/io.h>
static inline int of_address_to_resource(struct device_node *dev, int index,
struct resource *r)
{
@ -120,6 +125,12 @@ static inline void __iomem *of_iomap(struct device_node *device, int index)
{
return NULL;
}
static inline void __iomem *of_io_request_and_map(struct device_node *device,
int index, char *name)
{
return IOMEM_ERR_PTR(-EINVAL);
}
#endif
#if defined(CONFIG_OF_ADDRESS) && defined(CONFIG_PCI)

4
include/linux/sched.h
View file

@ -1367,8 +1367,8 @@ struct task_struct {
} vtime_snap_whence;
#endif
unsigned long nvcsw, nivcsw; /* context switch counts */
struct timespec start_time; /* monotonic time */
struct timespec real_start_time; /* boot based time */
u64 start_time; /* monotonic time in nsec */
u64 real_start_time; /* boot based time in nsec */
/* mm fault and swap info: this can arguably be seen as either mm-specific or thread-specific */
unsigned long min_flt, maj_flt;

5
include/linux/sh_timer.h
View file

@ -2,11 +2,6 @@
#define __SH_TIMER_H__
struct sh_timer_config {
char *name;
long channel_offset;
int timer_bit;
unsigned long clockevent_rating;
unsigned long clocksource_rating;
unsigned int channels_mask;
};

65
include/linux/time.h
View file

@ -4,19 +4,10 @@
# include <linux/cache.h>
# include <linux/seqlock.h>
# include <linux/math64.h>
#include <uapi/linux/time.h>
# include <linux/time64.h>
extern struct timezone sys_tz;
/* Parameters used to convert the timespec values: */
#define MSEC_PER_SEC 1000L
#define USEC_PER_MSEC 1000L
#define NSEC_PER_USEC 1000L
#define NSEC_PER_MSEC 1000000L
#define USEC_PER_SEC 1000000L
#define NSEC_PER_SEC 1000000000L
#define FSEC_PER_SEC 1000000000000000LL
#define TIME_T_MAX (time_t)((1UL << ((sizeof(time_t) << 3) - 1)) - 1)
static inline int timespec_equal(const struct timespec *a,
@ -84,13 +75,6 @@ static inline struct timespec timespec_sub(struct timespec lhs,
return ts_delta;
}
#define KTIME_MAX ((s64)~((u64)1 << 63))
#if (BITS_PER_LONG == 64)
# define KTIME_SEC_MAX (KTIME_MAX / NSEC_PER_SEC)
#else
# define KTIME_SEC_MAX LONG_MAX
#endif
/*
* Returns true if the timespec is norm, false if denorm:
*/
@ -115,27 +99,7 @@ static inline bool timespec_valid_strict(const struct timespec *ts)
return true;
}
extern bool persistent_clock_exist;
static inline bool has_persistent_clock(void)
{
return persistent_clock_exist;
}
extern void read_persistent_clock(struct timespec *ts);
extern void read_boot_clock(struct timespec *ts);
extern int persistent_clock_is_local;
extern int update_persistent_clock(struct timespec now);
void timekeeping_init(void);
extern int timekeeping_suspended;
unsigned long get_seconds(void);
struct timespec current_kernel_time(void);
struct timespec __current_kernel_time(void); /* does not take xtime_lock */
struct timespec get_monotonic_coarse(void);
void get_xtime_and_monotonic_and_sleep_offset(struct timespec *xtim,
struct timespec *wtom, struct timespec *sleep);
void timekeeping_inject_sleeptime(struct timespec *delta);
extern struct timespec timespec_trunc(struct timespec t, unsigned gran);
#define CURRENT_TIME (current_kernel_time())
#define CURRENT_TIME_SEC ((struct timespec) { get_seconds(), 0 })
@ -153,33 +117,14 @@ void timekeeping_inject_sleeptime(struct timespec *delta);
extern u32 (*arch_gettimeoffset)(void);
#endif
extern void do_gettimeofday(struct timeval *tv);
extern int do_settimeofday(const struct timespec *tv);
extern int do_sys_settimeofday(const struct timespec *tv,
const struct timezone *tz);
#define do_posix_clock_monotonic_gettime(ts) ktime_get_ts(ts)
extern long do_utimes(int dfd, const char __user *filename, struct timespec *times, int flags);
struct itimerval;
extern int do_setitimer(int which, struct itimerval *value,
struct itimerval *ovalue);
extern unsigned int alarm_setitimer(unsigned int seconds);
extern int do_getitimer(int which, struct itimerval *value);
extern int __getnstimeofday(struct timespec *tv);
extern void getnstimeofday(struct timespec *tv);
extern void getrawmonotonic(struct timespec *ts);
extern void getnstime_raw_and_real(struct timespec *ts_raw,
struct timespec *ts_real);
extern void getboottime(struct timespec *ts);
extern void monotonic_to_bootbased(struct timespec *ts);
extern void get_monotonic_boottime(struct timespec *ts);
extern struct timespec timespec_trunc(struct timespec t, unsigned gran);
extern int timekeeping_valid_for_hres(void);
extern u64 timekeeping_max_deferment(void);
extern int timekeeping_inject_offset(struct timespec *ts);
extern s32 timekeeping_get_tai_offset(void);
extern void timekeeping_set_tai_offset(s32 tai_offset);
extern void timekeeping_clocktai(struct timespec *ts);
extern unsigned int alarm_setitimer(unsigned int seconds);
extern long do_utimes(int dfd, const char __user *filename, struct timespec *times, int flags);
struct tms;
extern void do_sys_times(struct tms *);

190
include/linux/time64.h Normal file
View file

@ -0,0 +1,190 @@
#ifndef _LINUX_TIME64_H
#define _LINUX_TIME64_H
#include <uapi/linux/time.h>
typedef __s64 time64_t;
/*
* This wants to go into uapi/linux/time.h once we agreed about the
* userspace interfaces.
*/
#if __BITS_PER_LONG == 64
# define timespec64 timespec
#else
struct timespec64 {
time64_t tv_sec; /* seconds */
long tv_nsec; /* nanoseconds */
};
#endif
/* Parameters used to convert the timespec values: */
#define MSEC_PER_SEC 1000L
#define USEC_PER_MSEC 1000L
#define NSEC_PER_USEC 1000L
#define NSEC_PER_MSEC 1000000L
#define USEC_PER_SEC 1000000L
#define NSEC_PER_SEC 1000000000L
#define FSEC_PER_SEC 1000000000000000LL
/* Located here for timespec[64]_valid_strict */
#define KTIME_MAX ((s64)~((u64)1 << 63))
#define KTIME_SEC_MAX (KTIME_MAX / NSEC_PER_SEC)
#if __BITS_PER_LONG == 64
static inline struct timespec timespec64_to_timespec(const struct timespec64 ts64)
{
return ts64;
}
static inline struct timespec64 timespec_to_timespec64(const struct timespec ts)
{
return ts;
}
# define timespec64_equal timespec_equal
# define timespec64_compare timespec_compare
# define set_normalized_timespec64 set_normalized_timespec
# define timespec64_add_safe timespec_add_safe
# define timespec64_add timespec_add
# define timespec64_sub timespec_sub
# define timespec64_valid timespec_valid
# define timespec64_valid_strict timespec_valid_strict
# define timespec64_to_ns timespec_to_ns
# define ns_to_timespec64 ns_to_timespec
# define timespec64_add_ns timespec_add_ns
#else
static inline struct timespec timespec64_to_timespec(const struct timespec64 ts64)
{
struct timespec ret;
ret.tv_sec = (time_t)ts64.tv_sec;
ret.tv_nsec = ts64.tv_nsec;
return ret;
}
static inline struct timespec64 timespec_to_timespec64(const struct timespec ts)
{
struct timespec64 ret;
ret.tv_sec = ts.tv_sec;
ret.tv_nsec = ts.tv_nsec;
return ret;
}
static inline int timespec64_equal(const struct timespec64 *a,
const struct timespec64 *b)
{
return (a->tv_sec == b->tv_sec) && (a->tv_nsec == b->tv_nsec);
}
/*
* lhs < rhs: return <0
* lhs == rhs: return 0
* lhs > rhs: return >0
*/
static inline int timespec64_compare(const struct timespec64 *lhs, const struct timespec64 *rhs)
{
if (lhs->tv_sec < rhs->tv_sec)
return -1;
if (lhs->tv_sec > rhs->tv_sec)
return 1;
return lhs->tv_nsec - rhs->tv_nsec;
}
extern void set_normalized_timespec64(struct timespec64 *ts, time64_t sec, s64 nsec);
/*
* timespec64_add_safe assumes both values are positive and checks for
* overflow. It will return TIME_T_MAX if the returned value would be
* smaller then either of the arguments.
*/
extern struct timespec64 timespec64_add_safe(const struct timespec64 lhs,
const struct timespec64 rhs);
static inline struct timespec64 timespec64_add(struct timespec64 lhs,
struct timespec64 rhs)
{
struct timespec64 ts_delta;
set_normalized_timespec64(&ts_delta, lhs.tv_sec + rhs.tv_sec,
lhs.tv_nsec + rhs.tv_nsec);
return ts_delta;
}
/*
* sub = lhs - rhs, in normalized form
*/
static inline struct timespec64 timespec64_sub(struct timespec64 lhs,
struct timespec64 rhs)
{
struct timespec64 ts_delta;
set_normalized_timespec64(&ts_delta, lhs.tv_sec - rhs.tv_sec,
lhs.tv_nsec - rhs.tv_nsec);
return ts_delta;
}
/*
* Returns true if the timespec64 is norm, false if denorm:
*/
static inline bool timespec64_valid(const struct timespec64 *ts)
{
/* Dates before 1970 are bogus */
if (ts->tv_sec < 0)
return false;
/* Can't have more nanoseconds then a second */
if ((unsigned long)ts->tv_nsec >= NSEC_PER_SEC)
return false;
return true;
}
static inline bool timespec64_valid_strict(const struct timespec64 *ts)
{
if (!timespec64_valid(ts))
return false;
/* Disallow values that could overflow ktime_t */
if ((unsigned long long)ts->tv_sec >= KTIME_SEC_MAX)
return false;
return true;
}
/**
* timespec64_to_ns - Convert timespec64 to nanoseconds
* @ts: pointer to the timespec64 variable to be converted
*
* Returns the scalar nanosecond representation of the timespec64
* parameter.
*/
static inline s64 timespec64_to_ns(const struct timespec64 *ts)
{
return ((s64) ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec;
}
/**
* ns_to_timespec64 - Convert nanoseconds to timespec64
* @nsec: the nanoseconds value to be converted
*
* Returns the timespec64 representation of the nsec parameter.
*/
extern struct timespec64 ns_to_timespec64(const s64 nsec);
/**
* timespec64_add_ns - Adds nanoseconds to a timespec64
* @a: pointer to timespec64 to be incremented
* @ns: unsigned nanoseconds value to be added
*
* This must always be inlined because its used from the x86-64 vdso,
* which cannot call other kernel functions.
*/
static __always_inline void timespec64_add_ns(struct timespec64 *a, u64 ns)
{
a->tv_sec += __iter_div_u64_rem(a->tv_nsec + ns, NSEC_PER_SEC, &ns);
a->tv_nsec = ns;
}
#endif
#endif /* _LINUX_TIME64_H */

107
include/linux/timekeeper_internal.h
View file

@ -10,7 +10,22 @@
#include <linux/jiffies.h>
#include <linux/time.h>
/* Structure holding internal timekeeping values. */
/*
* Structure holding internal timekeeping values.
*
* Note: wall_to_monotonic is what we need to add to xtime (or xtime
* corrected for sub jiffie times) to get to monotonic time.
* Monotonic is pegged at zero at system boot time, so
* wall_to_monotonic will be negative, however, we will ALWAYS keep
* the tv_nsec part positive so we can use the usual normalization.
*
* wall_to_monotonic is moved after resume from suspend for the
* monotonic time not to jump. We need to add total_sleep_time to
* wall_to_monotonic to get the real boot based time offset.
*
* - wall_to_monotonic is no longer the boot time, getboottime must be
* used instead.
*/
struct timekeeper {
/* Current clocksource used for timekeeping. */
struct clocksource *clock;
@ -18,6 +33,32 @@ struct timekeeper {
u32 mult;
/* The shift value of the current clocksource. */
u32 shift;
/* Clock shifted nano seconds */
u64 xtime_nsec;
/* Monotonic base time */
ktime_t base_mono;
/* Current CLOCK_REALTIME time in seconds */
u64 xtime_sec;
/* CLOCK_REALTIME to CLOCK_MONOTONIC offset */
struct timespec64 wall_to_monotonic;
/* Offset clock monotonic -> clock realtime */
ktime_t offs_real;
/* Offset clock monotonic -> clock boottime */
ktime_t offs_boot;
/* Offset clock monotonic -> clock tai */
ktime_t offs_tai;
/* time spent in suspend */
struct timespec64 total_sleep_time;
/* The current UTC to TAI offset in seconds */
s32 tai_offset;
/* The raw monotonic time for the CLOCK_MONOTONIC_RAW posix clock. */
struct timespec64 raw_time;
/* Number of clock cycles in one NTP interval. */
cycle_t cycle_interval;
/* Last cycle value (also stored in clock->cycle_last) */
@ -29,58 +70,18 @@ struct timekeeper {
/* Raw nano seconds accumulated per NTP interval. */
u32 raw_interval;
/* Current CLOCK_REALTIME time in seconds */
u64 xtime_sec;
/* Clock shifted nano seconds */
u64 xtime_nsec;
/* Difference between accumulated time and NTP time in ntp
* shifted nano seconds. */
s64 ntp_error;
/* Shift conversion between clock shifted nano seconds and
* ntp shifted nano seconds. */
u32 ntp_error_shift;
/*
* wall_to_monotonic is what we need to add to xtime (or xtime corrected
* for sub jiffie times) to get to monotonic time. Monotonic is pegged
* at zero at system boot time, so wall_to_monotonic will be negative,
* however, we will ALWAYS keep the tv_nsec part positive so we can use
* the usual normalization.
*
* wall_to_monotonic is moved after resume from suspend for the
* monotonic time not to jump. We need to add total_sleep_time to
* wall_to_monotonic to get the real boot based time offset.
*
* - wall_to_monotonic is no longer the boot time, getboottime must be
* used instead.
* Difference between accumulated time and NTP time in ntp
* shifted nano seconds.
*/
struct timespec wall_to_monotonic;
/* Offset clock monotonic -> clock realtime */
ktime_t offs_real;
/* time spent in suspend */
struct timespec total_sleep_time;
/* Offset clock monotonic -> clock boottime */
ktime_t offs_boot;
/* The raw monotonic time for the CLOCK_MONOTONIC_RAW posix clock. */
struct timespec raw_time;
/* The current UTC to TAI offset in seconds */
s32 tai_offset;
/* Offset clock monotonic -> clock tai */
ktime_t offs_tai;
s64 ntp_error;
/*
* Shift conversion between clock shifted nano seconds and
* ntp shifted nano seconds.
*/
u32 ntp_error_shift;
};
static inline struct timespec tk_xtime(struct timekeeper *tk)
{
struct timespec ts;
ts.tv_sec = tk->xtime_sec;
ts.tv_nsec = (long)(tk->xtime_nsec >> tk->shift);
return ts;
}
#ifdef CONFIG_GENERIC_TIME_VSYSCALL
extern void update_vsyscall(struct timekeeper *tk);
@ -92,14 +93,6 @@ extern void update_vsyscall_old(struct timespec *ts, struct timespec *wtm,
struct clocksource *c, u32 mult);
extern void update_vsyscall_tz(void);
static inline void update_vsyscall(struct timekeeper *tk)
{
struct timespec xt;
xt = tk_xtime(tk);
update_vsyscall_old(&xt, &tk->wall_to_monotonic, tk->clock, tk->mult);
}
#else
static inline void update_vsyscall(struct timekeeper *tk)

190
include/linux/timekeeping.h Normal file
View file

@ -0,0 +1,190 @@
#ifndef _LINUX_TIMEKEEPING_H
#define _LINUX_TIMEKEEPING_H
/* Included from linux/ktime.h */
void timekeeping_init(void);
extern int timekeeping_suspended;
/*
* Get and set timeofday
*/
extern void do_gettimeofday(struct timeval *tv);
extern int do_settimeofday(const struct timespec *tv);
extern int do_sys_settimeofday(const struct timespec *tv,
const struct timezone *tz);
/*
* Kernel time accessors
*/
unsigned long get_seconds(void);
struct timespec current_kernel_time(void);
/* does not take xtime_lock */
struct timespec __current_kernel_time(void);
/*
* timespec based interfaces
*/
struct timespec get_monotonic_coarse(void);
extern void getrawmonotonic(struct timespec *ts);
extern void monotonic_to_bootbased(struct timespec *ts);
extern void get_monotonic_boottime(struct timespec *ts);
extern void ktime_get_ts64(struct timespec64 *ts);
extern int __getnstimeofday64(struct timespec64 *tv);
extern void getnstimeofday64(struct timespec64 *tv);
#if BITS_PER_LONG == 64
static inline int __getnstimeofday(struct timespec *ts)
{
return __getnstimeofday64(ts);
}
static inline void getnstimeofday(struct timespec *ts)
{
getnstimeofday64(ts);
}
static inline void ktime_get_ts(struct timespec *ts)
{
ktime_get_ts64(ts);
}
static inline void ktime_get_real_ts(struct timespec *ts)
{
getnstimeofday64(ts);
}
#else
static inline int __getnstimeofday(struct timespec *ts)
{
struct timespec64 ts64;
int ret = __getnstimeofday64(&ts64);
*ts = timespec64_to_timespec(ts64);
return ret;
}
static inline void getnstimeofday(struct timespec *ts)
{
struct timespec64 ts64;
getnstimeofday64(&ts64);
*ts = timespec64_to_timespec(ts64);
}
static inline void ktime_get_ts(struct timespec *ts)
{
struct timespec64 ts64;
ktime_get_ts64(&ts64);
*ts = timespec64_to_timespec(ts64);
}
static inline void ktime_get_real_ts(struct timespec *ts)
{
struct timespec64 ts64;
getnstimeofday64(&ts64);
*ts = timespec64_to_timespec(ts64);
}
#endif
extern void getboottime(struct timespec *ts);
#define do_posix_clock_monotonic_gettime(ts) ktime_get_ts(ts)
#define ktime_get_real_ts64(ts) getnstimeofday64(ts)
/*
* ktime_t based interfaces
*/
enum tk_offsets {
TK_OFFS_REAL,
TK_OFFS_BOOT,
TK_OFFS_TAI,
TK_OFFS_MAX,
};
extern ktime_t ktime_get(void);
extern ktime_t ktime_get_with_offset(enum tk_offsets offs);
extern ktime_t ktime_mono_to_any(ktime_t tmono, enum tk_offsets offs);
/**
* ktime_get_real - get the real (wall-) time in ktime_t format
*/
static inline ktime_t ktime_get_real(void)
{
return ktime_get_with_offset(TK_OFFS_REAL);
}
/**
* ktime_get_boottime - Returns monotonic time since boot in ktime_t format
*
* This is similar to CLOCK_MONTONIC/ktime_get, but also includes the
* time spent in suspend.
*/
static inline ktime_t ktime_get_boottime(void)
{
return ktime_get_with_offset(TK_OFFS_BOOT);
}
/**
* ktime_get_clocktai - Returns the TAI time of day in ktime_t format
*/
static inline ktime_t ktime_get_clocktai(void)
{
return ktime_get_with_offset(TK_OFFS_TAI);
}
/**
* ktime_mono_to_real - Convert monotonic time to clock realtime
*/
static inline ktime_t ktime_mono_to_real(ktime_t mono)
{
return ktime_mono_to_any(mono, TK_OFFS_REAL);
}
static inline u64 ktime_get_ns(void)
{
return ktime_to_ns(ktime_get());
}
static inline u64 ktime_get_real_ns(void)
{
return ktime_to_ns(ktime_get_real());
}
static inline u64 ktime_get_boot_ns(void)
{
return ktime_to_ns(ktime_get_boottime());
}
/*
* RTC specific
*/
extern void timekeeping_inject_sleeptime(struct timespec *delta);
/*
* PPS accessor
*/
extern void getnstime_raw_and_real(struct timespec *ts_raw,
struct timespec *ts_real);
/*
* Persistent clock related interfaces
*/
extern bool persistent_clock_exist;
extern int persistent_clock_is_local;
static inline bool has_persistent_clock(void)
{
return persistent_clock_exist;
}
extern void read_persistent_clock(struct timespec *ts);
extern void read_boot_clock(struct timespec *ts);
extern int update_persistent_clock(struct timespec now);
#endif

5
include/linux/timerfd.h
View file

@ -11,6 +11,9 @@
/* For O_CLOEXEC and O_NONBLOCK */
#include <linux/fcntl.h>
/* For _IO helpers */
#include <linux/ioctl.h>
/*
* CAREFUL: Check include/asm-generic/fcntl.h when defining
* new flags, since they might collide with O_* ones. We want
@ -29,4 +32,6 @@
/* Flags for timerfd_settime. */
#define TFD_SETTIME_FLAGS (TFD_TIMER_ABSTIME | TFD_TIMER_CANCEL_ON_SET)
#define TFD_IOC_SET_TICKS _IOW('T', 0, u64)
#endif /* _LINUX_TIMERFD_H */