git: d9c31658df84 - main - kern_umtx.c: remove dead code

The branch main has been updated by kib:

URL: https://cgit.FreeBSD.org/src/commit/?id=d9c31658df8492a5666e799c2b267c425cb8f468

commit d9c31658df8492a5666e799c2b267c425cb8f468
Author:     Konstantin Belousov <kib@FreeBSD.org>
AuthorDate: 2026-05-20 00:49:09 +0000
Commit:     Konstantin Belousov <kib@FreeBSD.org>
CommitDate: 2026-05-20 13:31:30 +0000

    kern_umtx.c: remove dead code
    
    It was a placeholder for the access control for process-shared umtx
    memory, which is not needed.
    
    Reviewed by:    markj
    Sponsored by:   The FreeBSD Foundation
    MFC after:      3 days
    Differential revision:  https://reviews.freebsd.org/D57122
---
 sys/kern/kern_umtx.c | 17 ++++++-----------
 1 file changed, 6 insertions(+), 11 deletions(-)

diff --git a/sys/kern/kern_umtx.c b/sys/kern/kern_umtx.c
index 905ebd4f98ac..d9798fb2adb6 100644
--- a/sys/kern/kern_umtx.c
+++ b/sys/kern/kern_umtx.c
@@ -4624,17 +4624,12 @@ umtx_shm(struct thread *td, void *addr, u_int flags)
 	if ((flags & UMTX_SHM_DESTROY) != 0) {
 		umtx_shm_unref_reg(reg, true);
 	} else {
-#if 0
-#ifdef MAC
-		error = mac_posixshm_check_open(td->td_ucred,
-		    reg->ushm_obj, FFLAGS(O_RDWR));
-		if (error == 0)
-#endif
-			error = shm_access(reg->ushm_obj, td->td_ucred,
-			    FFLAGS(O_RDWR));
-		if (error == 0)
-#endif
-			error = falloc_caps(td, &fp, &fd, O_CLOEXEC, NULL);
+		/*
+		 * The current vmspace has the mapping, so it can be
+		 * converted into shm filedescriptor for current
+		 * thread.
+		 */
+		error = falloc_caps(td, &fp, &fd, O_CLOEXEC, NULL);
 		if (error == 0) {
 			shm_hold(reg->ushm_obj);
 			finit(fp, FFLAGS(O_RDWR), DTYPE_SHM, reg->ushm_obj,