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epoch: replace hand coded assertion

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The assertion is equivalent to kstack_contains() so use that rather
than spelling it out.

Suggested by:	jhb
Reviewed by:	jhb
MFC after:	1 week
Sponsored by:	DARPA, AFRL
Differential Revision:	https://reviews.freebsd.org/D38107
This commit is contained in:
Brooks Davis 2023-01-20 18:03:39 +00:00
parent cf57f20edc
commit fa1d803c0f
1 changed files with 1 additions and 3 deletions
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4
sys/kern/subr_epoch.c
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@ -468,9 +468,7 @@ _epoch_enter_preempt(epoch_t epoch, epoch_tracker_t et EPOCH_FILE_LINE)
MPASS(cold || epoch != NULL);
td = curthread;
MPASS((vm_offset_t)et >= td->td_kstack &&
(vm_offset_t)et + sizeof(struct epoch_tracker) <=
td->td_kstack + td->td_kstack_pages * PAGE_SIZE);
MPASS(kstack_contains(td, (vm_offset_t)et, sizeof(*et)));
INIT_CHECK(epoch);
MPASS(epoch->e_flags & EPOCH_PREEMPT);