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authorThomas Gleixner <tglx@linutronix.de>2016-12-08 20:49:34 +0000
committerThomas Gleixner <tglx@linutronix.de>2016-12-09 12:06:41 +0100
commitacc89612a70e370a5640fd77a83f15b7b94d85e4 (patch)
tree147bc4f82c26a46c2b7e0ce69f3926213bf50c67
parent9c1645727b8fa90d07256fdfcc45bf831242a3ab (diff)
timekeeping: Make the conversion call chain consistently unsigned
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>
-rw-r--r--kernel/time/timekeeping.c26
1 files changed, 13 insertions, 13 deletions
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index bfe589e929e8..5244821643a4 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -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);