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Code Issues Releases Wiki Activity

timekeeping: Make the conversion call chain consistently unsigned

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Propagating a unsigned value through signed variables and functions makes
absolutely no sense and is just prone to (re)introduce subtle signed
vs. unsigned issues as happened recently.

Clean it up.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Parit Bhargava <prarit@redhat.com>
Cc: Laurent Vivier <lvivier@redhat.com>
Cc: "Christopher S. Hall" <christopher.s.hall@intel.com>
Cc: Chris Metcalf <cmetcalf@mellanox.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Liav Rehana <liavr@mellanox.com>
Cc: John Stultz <john.stultz@linaro.org>
Link: http://lkml.kernel.org/r/20161208204228.765843099@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Thomas Gleixner 2016-12-08 20:49:34 +00:00
parent 9c1645727b
commit acc89612a7
1 changed files with 13 additions and 13 deletions
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26
kernel/time/timekeeping.c
View file

@ -311,7 +311,7 @@ static inline u64 timekeeping_delta_to_ns(struct tk_read_base *tkr,
return nsec + arch_gettimeoffset();
}
static inline s64 timekeeping_get_ns(struct tk_read_base *tkr)
static inline u64 timekeeping_get_ns(struct tk_read_base *tkr)
{
cycle_t delta;
@ -319,8 +319,8 @@ static inline s64 timekeeping_get_ns(struct tk_read_base *tkr)
return timekeeping_delta_to_ns(tkr, delta);
}
static inline s64 timekeeping_cycles_to_ns(struct tk_read_base *tkr,
cycle_t cycles)
static inline u64 timekeeping_cycles_to_ns(struct tk_read_base *tkr,
cycle_t cycles)
{
cycle_t delta;
@ -652,7 +652,7 @@ static void timekeeping_forward_now(struct timekeeper *tk)
{
struct clocksource *clock = tk->tkr_mono.clock;
cycle_t cycle_now, delta;
s64 nsec;
u64 nsec;
cycle_now = tk->tkr_mono.read(clock);
delta = clocksource_delta(cycle_now, tk->tkr_mono.cycle_last, tk->tkr_mono.mask);
@ -681,7 +681,7 @@ int __getnstimeofday64(struct timespec64 *ts)
{
struct timekeeper *tk = &tk_core.timekeeper;
unsigned long seq;
s64 nsecs = 0;
u64 nsecs;
do {
seq = read_seqcount_begin(&tk_core.seq);
@ -721,7 +721,7 @@ ktime_t ktime_get(void)
struct timekeeper *tk = &tk_core.timekeeper;
unsigned int seq;
ktime_t base;
s64 nsecs;
u64 nsecs;
WARN_ON(timekeeping_suspended);
@ -764,7 +764,7 @@ ktime_t ktime_get_with_offset(enum tk_offsets offs)
struct timekeeper *tk = &tk_core.timekeeper;
unsigned int seq;
ktime_t base, *offset = offsets[offs];
s64 nsecs;
u64 nsecs;
WARN_ON(timekeeping_suspended);
@ -808,7 +808,7 @@ ktime_t ktime_get_raw(void)
struct timekeeper *tk = &tk_core.timekeeper;
unsigned int seq;
ktime_t base;
s64 nsecs;
u64 nsecs;
do {
seq = read_seqcount_begin(&tk_core.seq);
@ -833,8 +833,8 @@ void ktime_get_ts64(struct timespec64 *ts)
{
struct timekeeper *tk = &tk_core.timekeeper;
struct timespec64 tomono;
s64 nsec;
unsigned int seq;
u64 nsec;
WARN_ON(timekeeping_suspended);
@ -922,8 +922,8 @@ void ktime_get_snapshot(struct system_time_snapshot *systime_snapshot)
unsigned long seq;
ktime_t base_raw;
ktime_t base_real;
s64 nsec_raw;
s64 nsec_real;
u64 nsec_raw;
u64 nsec_real;
cycle_t now;
WARN_ON_ONCE(timekeeping_suspended);
@ -1081,7 +1081,7 @@ int get_device_system_crosststamp(int (*get_time_fn)
cycle_t cycles, now, interval_start;
unsigned int clock_was_set_seq = 0;
ktime_t base_real, base_raw;
s64 nsec_real, nsec_raw;
u64 nsec_real, nsec_raw;
u8 cs_was_changed_seq;
unsigned long seq;
bool do_interp;
@ -1394,7 +1394,7 @@ void getrawmonotonic64(struct timespec64 *ts)
struct timekeeper *tk = &tk_core.timekeeper;
struct timespec64 ts64;
unsigned long seq;
s64 nsecs;
u64 nsecs;
do {
seq = read_seqcount_begin(&tk_core.seq);