From acc89612a70e370a5640fd77a83f15b7b94d85e4 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Thu, 8 Dec 2016 20:49:34 +0000 Subject: [PATCH] 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 Reviewed-by: David Gibson Acked-by: Peter Zijlstra (Intel) Cc: Parit Bhargava Cc: Laurent Vivier Cc: "Christopher S. Hall" Cc: Chris Metcalf Cc: Richard Cochran Cc: Liav Rehana Cc: John Stultz Link: http://lkml.kernel.org/r/20161208204228.765843099@linutronix.de Signed-off-by: Thomas Gleixner --- kernel/time/timekeeping.c | 26 +++++++++++++------------- 1 file 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); -- 2.20.1