The branch stable/14 has been updated by ngie: URL: https://cgit.FreeBSD.org/src/commit/?id=64633a533e712882d86a1afbbe49ff7b8990f525
commit 64633a533e712882d86a1afbbe49ff7b8990f525 Author: Anagh Verma <[email protected]> AuthorDate: 2026-01-06 07:42:56 +0000 Commit: Enji Cooper <[email protected]> CommitDate: 2026-02-22 20:23:16 +0000 kern_syscall_deregister: document syscall 0 no-op logic Document syscall #0 being handled specially in `kern_syscall_deregister(..)`: it's a reserved syscall and not dynamically registered, and hence does not need to be deregistered in the function. Co-authored-by: ngie@ MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D54326 (cherry picked from commit f384784289dba13b90138a89d3df3a8ea063aff9) --- sys/kern/kern_syscalls.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/sys/kern/kern_syscalls.c b/sys/kern/kern_syscalls.c index e330f8a2ba09..2dfe162f6c2e 100644 --- a/sys/kern/kern_syscalls.c +++ b/sys/kern/kern_syscalls.c @@ -162,8 +162,14 @@ kern_syscall_deregister(struct sysent *sysents, int offset, { struct sysent *se; - if (offset == 0) - return (0); /* XXX? */ + if (offset == 0) { + /* + * Syscall #0 is reserved and is not dynamically registered. + * Treat deregistration as a no-op to simplify module unload + * paths. + */ + return (0); + } se = &sysents[offset]; if ((se->sy_thrcnt & SY_THR_STATIC) != 0)
