Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
timekeeping: Add clock_valid flag to timekeeper
In preparation for supporting independent auxiliary timekeepers, add a
clock valid field and set it to true for the system timekeeper.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: John Stultz <jstultz@google.com>
Link: https://lore.kernel.org/all/20250519083026.287145536@linutronix.de
+5
-2
+2
include/linux/timekeeper_internal.h
+2
include/linux/timekeeper_internal.h
···
73
73
* @raw_sec: CLOCK_MONOTONIC_RAW time in seconds
74
74
* @clock_was_set_seq: The sequence number of clock was set events
75
75
* @cs_was_changed_seq: The sequence number of clocksource change events
76
+
* @clock_valid: Indicator for valid clock
76
77
* @monotonic_to_boot: CLOCK_MONOTONIC to CLOCK_BOOTTIME offset
77
78
* @cycle_interval: Number of clock cycles in one NTP interval
78
79
* @xtime_interval: Number of clock shifted nano seconds in one NTP
···
150
149
/* Cachline 3 and 4 (timekeeping internal variables): */
151
150
unsigned int clock_was_set_seq;
152
151
u8 cs_was_changed_seq;
152
+
u8 clock_valid;
153
153
154
154
struct timespec64 monotonic_to_boot;
155
155
+3
-2
kernel/time/timekeeping.c
+3
-2
kernel/time/timekeeping.c
···
1665
1665
*boot_offset = ns_to_timespec64(local_clock());
1666
1666
}
1667
1667
1668
-
static __init void tkd_basic_setup(struct tk_data *tkd, enum timekeeper_ids tk_id)
1668
+
static __init void tkd_basic_setup(struct tk_data *tkd, enum timekeeper_ids tk_id, bool valid)
1669
1669
{
1670
1670
raw_spin_lock_init(&tkd->lock);
1671
1671
seqcount_raw_spinlock_init(&tkd->seq, &tkd->lock);
1672
1672
tkd->timekeeper.id = tkd->shadow_timekeeper.id = tk_id;
1673
+
tkd->timekeeper.clock_valid = tkd->shadow_timekeeper.clock_valid = valid;
1673
1674
}
1674
1675
1675
1676
/*
···
1700
1699
struct timekeeper *tks = &tk_core.shadow_timekeeper;
1701
1700
struct clocksource *clock;
1702
1701
1703
-
tkd_basic_setup(&tk_core, TIMEKEEPER_CORE);
1702
+
tkd_basic_setup(&tk_core, TIMEKEEPER_CORE, true);
1704
1703
1705
1704
read_persistent_wall_and_boot_offset(&wall_time, &boot_offset);
1706
1705
if (timespec64_valid_settod(&wall_time) &&