diff --git a/sys/amd64/amd64/elf_machdep.c b/sys/amd64/amd64/elf_machdep.c
--- a/sys/amd64/amd64/elf_machdep.c
+++ b/sys/amd64/amd64/elf_machdep.c
@@ -226,7 +226,7 @@
 };
 
 SYSINIT(oelf64, SI_SUB_EXEC, SI_ORDER_ANY,
-    (sysinit_cfunc_t)elf64_insert_brand_entry, &freebsd_brand_oinfo);
+    elf64_insert_brand_entry, &freebsd_brand_oinfo);
 
 static Elf64_Brandinfo kfreebsd_brand_info = {
 	.brand		= ELFOSABI_FREEBSD,
@@ -240,7 +240,7 @@
 };
 
 SYSINIT(kelf64, SI_SUB_EXEC, SI_ORDER_ANY,
-    (sysinit_cfunc_t)elf64_insert_brand_entry, &kfreebsd_brand_info);
+    elf64_insert_brand_entry, &kfreebsd_brand_info);
 
 void
 elf64_dump_thread(struct thread *td, void *dst, size_t *off)
diff --git a/sys/arm/arm/elf_machdep.c b/sys/arm/arm/elf_machdep.c
--- a/sys/arm/arm/elf_machdep.c
+++ b/sys/arm/arm/elf_machdep.c
@@ -117,8 +117,7 @@
 };
 
 SYSINIT(elf32, SI_SUB_EXEC, SI_ORDER_FIRST,
-	(sysinit_cfunc_t) elf32_insert_brand_entry,
-	&freebsd_brand_info);
+    elf32_insert_brand_entry, &freebsd_brand_info);
 
 static bool
 elf32_arm_abi_supported(const struct image_params *imgp,
diff --git a/sys/arm64/arm64/elf_machdep.c b/sys/arm64/arm64/elf_machdep.c
--- a/sys/arm64/arm64/elf_machdep.c
+++ b/sys/arm64/arm64/elf_machdep.c
@@ -121,7 +121,7 @@
 };
 
 SYSINIT(elf64, SI_SUB_EXEC, SI_ORDER_FIRST,
-    (sysinit_cfunc_t)elf64_insert_brand_entry, &freebsd_brand_info);
+    elf64_insert_brand_entry, &freebsd_brand_info);
 
 static bool
 get_arm64_addr_mask(struct regset *rs, struct thread *td, void *buf,
diff --git a/sys/compat/ia32/ia32_sysvec.c b/sys/compat/ia32/ia32_sysvec.c
--- a/sys/compat/ia32/ia32_sysvec.c
+++ b/sys/compat/ia32/ia32_sysvec.c
@@ -157,8 +157,7 @@
 };
 
 SYSINIT(ia32, SI_SUB_EXEC, SI_ORDER_MIDDLE,
-	(sysinit_cfunc_t) elf32_insert_brand_entry,
-	&ia32_brand_info);
+    elf32_insert_brand_entry, &ia32_brand_info);
 
 static Elf32_Brandinfo ia32_brand_oinfo = {
 	.brand		= ELFOSABI_FREEBSD,
@@ -172,8 +171,7 @@
 };
 
 SYSINIT(oia32, SI_SUB_EXEC, SI_ORDER_ANY,
-	(sysinit_cfunc_t) elf32_insert_brand_entry,
-	&ia32_brand_oinfo);
+    elf32_insert_brand_entry, &ia32_brand_oinfo);
 
 static Elf32_Brandinfo kia32_brand_info = {
 	.brand		= ELFOSABI_FREEBSD,
@@ -186,8 +184,7 @@
 };
 
 SYSINIT(kia32, SI_SUB_EXEC, SI_ORDER_ANY,
-	(sysinit_cfunc_t) elf32_insert_brand_entry,
-	&kia32_brand_info);
+    elf32_insert_brand_entry, &kia32_brand_info);
 
 void
 elf32_dump_thread(struct thread *td, void *dst, size_t *off)
diff --git a/sys/i386/i386/elf_machdep.c b/sys/i386/i386/elf_machdep.c
--- a/sys/i386/i386/elf_machdep.c
+++ b/sys/i386/i386/elf_machdep.c
@@ -104,8 +104,7 @@
 };
 
 SYSINIT(elf32, SI_SUB_EXEC, SI_ORDER_FIRST,
-	(sysinit_cfunc_t) elf32_insert_brand_entry,
-	&freebsd_brand_info);
+    elf32_insert_brand_entry, &freebsd_brand_info);
 
 static Elf32_Brandinfo freebsd_brand_oinfo = {
 	.brand		= ELFOSABI_FREEBSD,
@@ -119,8 +118,7 @@
 };
 
 SYSINIT(oelf32, SI_SUB_EXEC, SI_ORDER_ANY,
-	(sysinit_cfunc_t) elf32_insert_brand_entry,
-	&freebsd_brand_oinfo);
+    elf32_insert_brand_entry, &freebsd_brand_oinfo);
 
 static Elf32_Brandinfo kfreebsd_brand_info = {
 	.brand		= ELFOSABI_FREEBSD,
@@ -134,8 +132,7 @@
 };
 
 SYSINIT(kelf32, SI_SUB_EXEC, SI_ORDER_ANY,
-	(sysinit_cfunc_t) elf32_insert_brand_entry,
-	&kfreebsd_brand_info);
+    elf32_insert_brand_entry, &kfreebsd_brand_info);
 
 void
 elf32_dump_thread(struct thread *td, void *dst, size_t *off)
diff --git a/sys/kern/kern_sharedpage.c b/sys/kern/kern_sharedpage.c
--- a/sys/kern/kern_sharedpage.c
+++ b/sys/kern/kern_sharedpage.c
@@ -130,8 +130,7 @@
 	shared_page_mapping = (char *)addr;
 }
 
-SYSINIT(shp, SI_SUB_EXEC, SI_ORDER_FIRST, (sysinit_cfunc_t)shared_page_init,
-    NULL);
+SYSINIT(shp, SI_SUB_EXEC, SI_ORDER_FIRST, shared_page_init, NULL);
 
 /*
  * Push the timehands update to the shared page.
diff --git a/sys/powerpc/powerpc/elf32_machdep.c b/sys/powerpc/powerpc/elf32_machdep.c
--- a/sys/powerpc/powerpc/elf32_machdep.c
+++ b/sys/powerpc/powerpc/elf32_machdep.c
@@ -157,8 +157,7 @@
 };
 
 SYSINIT(elf32, SI_SUB_EXEC, SI_ORDER_FIRST,
-    (sysinit_cfunc_t) elf32_insert_brand_entry,
-    &freebsd_brand_info);
+    elf32_insert_brand_entry, &freebsd_brand_info);
 
 static Elf32_Brandinfo freebsd_brand_oinfo = {
 	.brand		= ELFOSABI_FREEBSD,
@@ -172,8 +171,7 @@
 };
 
 SYSINIT(oelf32, SI_SUB_EXEC, SI_ORDER_ANY,
-	(sysinit_cfunc_t) elf32_insert_brand_entry,
-	&freebsd_brand_oinfo);
+    elf32_insert_brand_entry, &freebsd_brand_oinfo);
 
 void elf_reloc_self(Elf_Dyn *dynp, Elf_Addr relocbase);
 
diff --git a/sys/powerpc/powerpc/elf64_machdep.c b/sys/powerpc/powerpc/elf64_machdep.c
--- a/sys/powerpc/powerpc/elf64_machdep.c
+++ b/sys/powerpc/powerpc/elf64_machdep.c
@@ -163,8 +163,7 @@
 };
 
 SYSINIT(elf64v1, SI_SUB_EXEC, SI_ORDER_ANY,
-    (sysinit_cfunc_t) elf64_insert_brand_entry,
-    &freebsd_brand_info_elfv1);
+    elf64_insert_brand_entry, &freebsd_brand_info_elfv1);
 
 static Elf64_Brandinfo freebsd_brand_info_elfv2 = {
 	.brand		= ELFOSABI_FREEBSD,
@@ -179,8 +178,7 @@
 };
 
 SYSINIT(elf64v2, SI_SUB_EXEC, SI_ORDER_ANY,
-    (sysinit_cfunc_t) elf64_insert_brand_entry,
-    &freebsd_brand_info_elfv2);
+    elf64_insert_brand_entry, &freebsd_brand_info_elfv2);
 
 static Elf64_Brandinfo freebsd_brand_oinfo = {
 	.brand		= ELFOSABI_FREEBSD,
@@ -195,8 +193,7 @@
 };
 
 SYSINIT(oelf64, SI_SUB_EXEC, SI_ORDER_ANY,
-	(sysinit_cfunc_t) elf64_insert_brand_entry,
-	&freebsd_brand_oinfo);
+    elf64_insert_brand_entry, &freebsd_brand_oinfo);
 
 void elf_reloc_self(Elf_Dyn *dynp, Elf_Addr relocbase);
 
diff --git a/sys/riscv/riscv/elf_machdep.c b/sys/riscv/riscv/elf_machdep.c
--- a/sys/riscv/riscv/elf_machdep.c
+++ b/sys/riscv/riscv/elf_machdep.c
@@ -111,7 +111,7 @@
 	.flags		= BI_CAN_EXEC_DYN | BI_BRAND_NOTE
 };
 SYSINIT(elf64, SI_SUB_EXEC, SI_ORDER_FIRST,
-    (sysinit_cfunc_t)elf64_insert_brand_entry, &freebsd_brand_info);
+    elf64_insert_brand_entry, &freebsd_brand_info);
 
 static void
 elf64_register_sysvec(void *arg)
diff --git a/sys/sys/sysent.h b/sys/sys/sysent.h
--- a/sys/sys/sysent.h
+++ b/sys/sys/sysent.h
@@ -340,8 +340,7 @@
 void exec_onexec_old(struct thread *td);
 
 #define INIT_SYSENTVEC(name, sv)					\
-    SYSINIT(name, SI_SUB_EXEC, SI_ORDER_ANY,				\
-	(sysinit_cfunc_t)exec_sysvec_init, sv);
+    SYSINIT(name, SI_SUB_EXEC, SI_ORDER_ANY, exec_sysvec_init, sv)
 
 #endif /* _KERNEL */