Also atomically accessed integer local to pfkeyv2_acquire(). The rest
ones of `ipsecctl_vars' belong to other source files.

Index: sys/net/pfkeyv2.c
===================================================================
RCS file: /cvs/src/sys/net/pfkeyv2.c,v
retrieving revision 1.266
diff -u -p -r1.266 pfkeyv2.c
--- sys/net/pfkeyv2.c	12 May 2025 17:20:09 -0000	1.266
+++ sys/net/pfkeyv2.c	12 May 2025 18:34:34 -0000
@@ -2159,12 +2159,15 @@ pfkeyv2_acquire(struct ipsec_policy *ipo
 	int i, j, registered;
 
 #ifdef IPSEC
+	int require_pfs_local;
 	int def_enc_local, def_comp_local, def_auth_local;
 	int soft_allocations_local, exp_allocations_local;
 	int soft_bytes_local, exp_bytes_local;
 	int soft_timeout_local, exp_timeout_local;
 	int soft_first_use_local, exp_first_use_local;
 
+	require_pfs_local = atomic_load_int(&ipsec_require_pfs);
+
 	def_enc_local = atomic_load_int(&ipsec_def_enc);
 	def_comp_local = atomic_load_int(&ipsec_def_comp);
 	def_auth_local = atomic_load_int(&ipsec_def_auth);
@@ -2267,7 +2270,7 @@ pfkeyv2_acquire(struct ipsec_policy *ipo
 	for (j = 0; j < sa_prop->sadb_prop_num; j++) {
 		sadb_comb->sadb_comb_flags = 0;
 #ifdef IPSEC
-		if (ipsec_require_pfs)
+		if (require_pfs_local)
 			sadb_comb->sadb_comb_flags |= SADB_SAFLAGS_PFS;
 
 		if (ipo->ipo_sproto == IPPROTO_ESP) {
Index: sys/netinet/ipsec_input.c
===================================================================
RCS file: /cvs/src/sys/netinet/ipsec_input.c,v
retrieving revision 1.211
diff -u -p -r1.211 ipsec_input.c
--- sys/netinet/ipsec_input.c	12 May 2025 17:20:09 -0000	1.211
+++ sys/netinet/ipsec_input.c	12 May 2025 18:34:34 -0000
@@ -107,7 +107,7 @@ void ipsec_common_ctlinput(u_int, int, s
 /* sysctl variables */
 int encdebug = 0;
 int ipsec_keep_invalid = IPSEC_DEFAULT_EMBRYONIC_SA_TIMEOUT;
-int ipsec_require_pfs = IPSEC_DEFAULT_PFS;
+int ipsec_require_pfs = IPSEC_DEFAULT_PFS;			/* [a] */
 int ipsec_soft_allocations = IPSEC_DEFAULT_SOFT_ALLOCATIONS;	/* [a] */
 int ipsec_exp_allocations = IPSEC_DEFAULT_EXP_ALLOCATIONS;	/* [a] */
 int ipsec_soft_bytes = IPSEC_DEFAULT_SOFT_BYTES;		/* [a] */
@@ -176,10 +176,10 @@ const struct sysctl_bounded_args ipsecct
 	{ IPSEC_ENCDEBUG, &encdebug, 0, 1 },
 	{ IPSEC_EXPIRE_ACQUIRE, &ipsec_expire_acquire, 0, INT_MAX },
 	{ IPSEC_EMBRYONIC_SA_TIMEOUT, &ipsec_keep_invalid, 0, INT_MAX },
-	{ IPSEC_REQUIRE_PFS, &ipsec_require_pfs, 0, 1 },
 };
 
 const struct sysctl_bounded_args ipsecctl_vars[] = {
+	{ IPSEC_REQUIRE_PFS, &ipsec_require_pfs, 0, 1 },
 	{ IPSEC_SOFT_ALLOCATIONS, &ipsec_soft_allocations, 0, INT_MAX },
 	{ IPSEC_ALLOCATIONS, &ipsec_exp_allocations, 0, INT_MAX },
 	{ IPSEC_SOFT_BYTES, &ipsec_soft_bytes, 0, INT_MAX },
@@ -651,7 +651,6 @@ ipsec_sysctl(int *name, u_int namelen, v
 	case IPSEC_ENCDEBUG:
 	case IPSEC_EXPIRE_ACQUIRE:
 	case IPSEC_EMBRYONIC_SA_TIMEOUT:
-	case IPSEC_REQUIRE_PFS:
 		NET_LOCK();
 		error = sysctl_bounded_arr(ipsecctl_vars_locked,
 		    nitems(ipsecctl_vars_locked), name, namelen,