A bunch of function definitions used empty parentheses instead of (void) syntax, yielding the following warning when building with clang on macOS:

warning: a function declaration without a prototype is deprecated in all versions of C [-Wstrict-prototypes]

In addition to fixing these function headers, it also fixes what appears to be a typo causing a variable to be unused after initialisation.

warning: variable 'entry_ctls' set but not used [-Wunused-but-set-variable]

Signed-off-by: Phil Dennis-Jordan <phil@philjordan.eu>
Reviewed-by: Roman Bolshakov <roman@roolebo.dev>
Tested-by: Roman Bolshakov <roman@roolebo.dev>
---
 target/i386/hvf/vmx.h        | 3 +--
 target/i386/hvf/x86_decode.c | 2 +-
 target/i386/hvf/x86_emu.c    | 4 ++--
 3 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/target/i386/hvf/vmx.h b/target/i386/hvf/vmx.h
index 0fffcfa46c..3954ef883d 100644
--- a/target/i386/hvf/vmx.h
+++ b/target/i386/hvf/vmx.h
@@ -95,8 +95,7 @@ static void enter_long_mode(hv_vcpuid_t vcpu, uint64_t cr0, uint64_t efer)
     efer |= MSR_EFER_LMA;
     wvmcs(vcpu, VMCS_GUEST_IA32_EFER, efer);
     entry_ctls = rvmcs(vcpu, VMCS_ENTRY_CTLS);
-    wvmcs(vcpu, VMCS_ENTRY_CTLS, rvmcs(vcpu, VMCS_ENTRY_CTLS) |
-          VM_ENTRY_GUEST_LMA);
+    wvmcs(vcpu, VMCS_ENTRY_CTLS, entry_ctls | VM_ENTRY_GUEST_LMA);
 
     uint64_t guest_tr_ar = rvmcs(vcpu, VMCS_GUEST_TR_ACCESS_RIGHTS);
     if ((efer & MSR_EFER_LME) &&
diff --git a/target/i386/hvf/x86_decode.c b/target/i386/hvf/x86_decode.c
index 3728d7705e..a4a28f113f 100644
--- a/target/i386/hvf/x86_decode.c
+++ b/target/i386/hvf/x86_decode.c
@@ -2111,7 +2111,7 @@ uint32_t decode_instruction(CPUX86State *env, struct x86_decode *decode)
     return decode->len;
 }
 
-void init_decoder()
+void init_decoder(void)
 {
     int i;
     
diff --git a/target/i386/hvf/x86_emu.c b/target/i386/hvf/x86_emu.c
index 3a3f0a50d0..38c782b8e3 100644
--- a/target/i386/hvf/x86_emu.c
+++ b/target/i386/hvf/x86_emu.c
@@ -1409,7 +1409,7 @@ static struct cmd_handler {
 
 static struct cmd_handler _cmd_handler[X86_DECODE_CMD_LAST];
 
-static void init_cmd_handler()
+static void init_cmd_handler(void)
 {
     int i;
     for (i = 0; i < ARRAY_SIZE(handlers); i++) {
@@ -1481,7 +1481,7 @@ bool exec_instruction(CPUX86State *env, struct x86_decode *ins)
     return true;
 }
 
-void init_emu()
+void init_emu(void)
 {
     init_cmd_handler();
 }
-- 
2.36.1