The branch stable/14 has been updated by bapt:

URL: 
https://cgit.FreeBSD.org/src/commit/?id=104328e63034f34a7961c0ebfb2dfdf78717982d

commit 104328e63034f34a7961c0ebfb2dfdf78717982d
Author:     Baptiste Daroussin <[email protected]>
AuthorDate: 2024-03-06 14:11:32 +0000
Commit:     Baptiste Daroussin <[email protected]>
CommitDate: 2024-03-18 14:39:52 +0000

    timerfd_create: accept CLOCK_UPTIME/CLOCK_BOOTTIME
    
    This is a common use case when using timerfd_create to actually use
    it with CLOCK_BOOTTIME on linux which is CLOCK_UPTIME for us.
    
    Note that currently on freebsd CLOCK_BOOTTIME is CLOCK_UPTIME, but the
    semantic is supposed to be different, this has to be fixed later.
    
    Tested with the fnott notification software
    
    Reviewed by:    des, imp
    Differential Revision:  https://reviews.freebsd.org/D44253
    
    (cherry picked from commit cf742faa39a58a9b43b671c66097e6880459d4ae)
    (cherry picked from commit 0ecf0b26a750582b804e238e6446db55188d7fdc)
---
 sys/kern/sys_timerfd.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/sys/kern/sys_timerfd.c b/sys/kern/sys_timerfd.c
index d9c0e189baf2..80d1e9f4bfb2 100644
--- a/sys/kern/sys_timerfd.c
+++ b/sys/kern/sys_timerfd.c
@@ -431,8 +431,20 @@ kern_timerfd_create(struct thread *td, int clockid, int 
flags)
        AUDIT_ARG_VALUE(clockid);
        AUDIT_ARG_FFLAGS(flags);
 
-       if (clockid != CLOCK_REALTIME && clockid != CLOCK_MONOTONIC)
+       switch (clockid) {
+       case CLOCK_REALTIME:
+               /* FALLTHROUGH */
+       case CLOCK_MONOTONIC:
+               /* FALLTHROUGH */
+       case CLOCK_UPTIME:
+               /*
+                * CLOCK_BOOTTIME should be added once different from
+                * CLOCK_UPTIME
+                */
+               break;
+       default:
                return (EINVAL);
+       }
        if ((flags & ~(TFD_CLOEXEC | TFD_NONBLOCK)) != 0)
                return (EINVAL);
 

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