Module Name: src Committed By: thorpej Date: Wed Jan 1 21:09:12 UTC 2020
Modified Files: src/sys/dev: clock_subr.h src/sys/kern: init_main.c kern_todr.c Log Message: First steps towards properly serializing access to the TOD clock. - Add a mutex around the TODR, and provide lock/unlock/lock-owned functions to manipulate it. - Rename inittodr() to todr_set_systime() and resettodr() to todr_save_systime() to better reflect what they do. These functions are intended to be called with the TODR lock held, which will allow for a pattern like: -> todr_lock() -> todr_save_systime() -> [do machine-dependent stuff to sleep/suspend] -> [magically awaken] -> todr_set_systime(...) -> todr_unlock() - Provide historically-named wrappers inittodr() and resettodr() that do the dance of acquiring / releasing the lock around the actual substance. NOTE: resettodr()'s use of the TODR lock is currently disabled (and todr_save_systime() does not assert it's held) until such time as issues around shutdown / reboot under duress can be addressed. To generate a diff of this commit: cvs rdiff -u -r1.28 -r1.29 src/sys/dev/clock_subr.h cvs rdiff -u -r1.514 -r1.515 src/sys/kern/init_main.c cvs rdiff -u -r1.43 -r1.44 src/sys/kern/kern_todr.c Please note that diffs are not public domain; they are subject to the copyright notices on the relevant files.