The branch main has been updated by imp:

URL: 
https://cgit.FreeBSD.org/src/commit/?id=cec58bba6425d4b9cf19a9ede9ca0dc00c1d48e3

commit cec58bba6425d4b9cf19a9ede9ca0dc00c1d48e3
Author:     Peter Eriksson <[email protected]>
AuthorDate: 2024-10-14 04:01:33 +0000
Commit:     Warner Losh <[email protected]>
CommitDate: 2024-10-14 05:23:45 +0000

    ciss: Expose tunable hw.ciss.nop_message_heartbeat as sysctl
    
    Expose the hw.ciss.nop_message_heartbeat tuneable as a sysctl and make
    it writeable at runtime.
    
    PR: 246279
    Reviewed by: imp
    Tested by: Marek Zarychta
    Differential Revision: https://reviews.freebsd.org/D25155
---
 sys/dev/ciss/ciss.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sys/dev/ciss/ciss.c b/sys/dev/ciss/ciss.c
index 1875c056f32d..67d74ba65526 100644
--- a/sys/dev/ciss/ciss.c
+++ b/sys/dev/ciss/ciss.c
@@ -271,6 +271,9 @@ SYSCTL_INT(_hw_ciss, OID_AUTO, expose_hidden_physical, 
CTLFLAG_RWTUN,
 
 static unsigned int ciss_nop_message_heartbeat = 0;
 TUNABLE_INT("hw.ciss.nop_message_heartbeat", &ciss_nop_message_heartbeat);
+SYSCTL_INT(_hw_ciss, OID_AUTO, nop_message_heartbeat, CTLFLAG_RWTUN,
+          &ciss_nop_message_heartbeat, 0,
+          "nop heartbeat messages");
 
 /*
  * This tunable can force a particular transport to be used:

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