freebsd-skq/sys/x86
ian 242599409b Protect access to the AT realtime clock with its own mutex.
The mutex protecting access to the registered realtime clock should not be
overloaded to protect access to the atrtc hardware, which might not even be
the registered rtc. More importantly, the resettodr mutex needs to be
eliminated to remove locking/sleeping restrictions on clock drivers, and
that can't happen if MD code for amd64 depends on it. This change moves the
protection into what's really being protected: access to the atrtc date and
time registers.

This change also adds protection when the clock is accessed from
xentimer_settime(), which bypasses the resettodr locking.

Differential Revision:	https://reviews.freebsd.org/D11483
2017-07-12 02:42:57 +00:00
..
acpica More accurately handle early EFER restoration on resume. 2017-06-11 14:39:08 +00:00
bios
cpufreq - Mention mismatching numbers in MSR vs. ACPI _PSS count warning: seeing 2016-12-01 14:31:05 +00:00
include Clean up MD pollution of bus_dma.h: 2017-07-01 05:35:29 +00:00
iommu Clean up MD pollution of bus_dma.h: 2017-07-01 05:35:29 +00:00
isa Protect access to the AT realtime clock with its own mutex. 2017-07-12 02:42:57 +00:00
pci Convert PCIe Hot Plug to using pci_request_feature 2017-02-25 06:11:59 +00:00
x86 Clean up MD pollution of bus_dma.h: 2017-07-01 05:35:29 +00:00
xen All these files need sys/vmmeter.h, but now they got it implicitly 2017-04-17 17:07:00 +00:00