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| author | Peter Hilber <peter.hilber@opensynergy.com> | 2024-02-01 04:04:47 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2024-02-07 19:05:21 +0300 |
| commit | 93630d6df7507fa4e664110b1878c06a0c00b0b9 (patch) | |
| tree | 5f32a87668f9c9e42fde685d8bf24f67d3f4f1d0 /mm/usercopy.c | |
| parent | c55cbfcea6087cca1f7891a8d1ca52dcae946be5 (diff) | |
| download | linux-93630d6df7507fa4e664110b1878c06a0c00b0b9.tar.xz | |
timekeeping: Add clocksource ID to struct system_counterval_t
Clocksource pointers can be problematic to obtain for drivers which are not
clocksource drivers themselves. In particular, the RFC virtio_rtc driver
[1] would require a new helper function to obtain a pointer to the ARM
Generic Timer clocksource. The ptp_kvm driver also required a similar
workaround.
Add a clocksource ID member to struct system_counterval_t, which in the
future shall identify the clocksource, and which shall replace the struct
clocksource * member. By this, get_device_system_crosststamp() callers
(such as virtio_rtc and ptp_kvm) will be able to supply easily accessible
clocksource ids instead of clocksource pointers.
[1] https://lore.kernel.org/lkml/20231218073849.35294-1-peter.hilber@opensynergy.com/
Signed-off-by: Peter Hilber <peter.hilber@opensynergy.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20240201010453.2212371-3-peter.hilber@opensynergy.com
Diffstat (limited to 'mm/usercopy.c')
0 files changed, 0 insertions, 0 deletions