[Bug 278826] [hpet] cdev->si_refcount leakage when enable hpet as timecounter hardware

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=278826

--- Comment #8 from commit-hook@FreeBSD.org ---
A commit in branch main references this bug:

URL:
https://cgit.FreeBSD.org/src/commit/?id=e93404065177d6c909cd64bf7d74fe0d8df35edf

commit e93404065177d6c909cd64bf7d74fe0d8df35edf
Author:     Konstantin Belousov <kib@FreeBSD.org>
AuthorDate: 2024-05-07 13:23:28 +0000
Commit:     Konstantin Belousov <kib@FreeBSD.org>
CommitDate: 2024-05-12 01:13:00 +0000

    cdev_pager_allocate(): ensure that the cdev_pager_ops ctr is called only
once

    per allocated vm_object.  Otherwise, since constructors are not
    idempotent, we e.g. leak device reference in case of non-managed pager.

    PR:     278826
    Reported by:    Austin Zhang <austin.zhang@dell.com>
    Reviewed by:    alc, markj
    Tested by:      pho
    Sponsored by:   The FreeBSD Foundation
    MFC after:      1 week
    Differential revision:  https://reviews.freebsd.org/D45113

 sys/vm/device_pager.c | 70 +++++++++++++++++++++++++++++++++++++--------------
 1 file changed, 51 insertions(+), 19 deletions(-)

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