Date: Mon, 22 Nov 2021 13:46:23 GMT From: Mark Johnston <markj@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: 686b143f37c5 - stable/13 - timecounter: Initialize tc_lock earlier Message-ID: <202111221346.1AMDkNFk037556@gitrepo.freebsd.org>
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The branch stable/13 has been updated by markj: URL: https://cgit.FreeBSD.org/src/commit/?id=686b143f37c501c79c0ddbbcb55ce852cc0bc846 commit 686b143f37c501c79c0ddbbcb55ce852cc0bc846 Author: Mark Johnston <markj@FreeBSD.org> AuthorDate: 2021-11-19 22:29:28 +0000 Commit: Mark Johnston <markj@FreeBSD.org> CommitDate: 2021-11-22 13:44:49 +0000 timecounter: Initialize tc_lock earlier Hyper-V wants to register its MSR-based timecounter during SI_SUB_HYPERVISOR, before SI_SUB_LOCK, since an emulated 8254 may not be available for DELAY(). So we cannot use MTX_SYSINIT to initialize the timecounter lock. PR: 259878 Reviewed by: kib Sponsored by: The FreeBSD Foundation (cherry picked from commit 3339950117bedb5f880f6c08982dcc5dd43f9c34) --- sys/kern/kern_tc.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/sys/kern/kern_tc.c b/sys/kern/kern_tc.c index 135279d48a22..989457b82434 100644 --- a/sys/kern/kern_tc.c +++ b/sys/kern/kern_tc.c @@ -100,7 +100,6 @@ static struct timecounter *timecounters = &dummy_timecounter; /* Mutex to protect the timecounter list. */ static struct mtx tc_lock; -MTX_SYSINIT(tc_lock, &tc_lock, "tc", MTX_DEF); int tc_min_ticktock_freq = 1; @@ -1982,6 +1981,8 @@ inittimehands(void *dummy) TUNABLE_STR_FETCH("kern.timecounter.hardware", tc_from_tunable, sizeof(tc_from_tunable)); + + mtx_init(&tc_lock, "tc", NULL, MTX_DEF); } SYSINIT(timehands, SI_SUB_TUNABLES, SI_ORDER_ANY, inittimehands, NULL);
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