KVM: x86: Clean up redundant ROL16(val, n) macro definition

The ROL16(val, n) macro is repeatedly defined in several vmcs-related
files, and it has never been used outside the KVM context.

Let's move it to vmcs.h without any intended functional changes.
Signed-off-by: Like Xu <likexu@tencent.com>
Message-Id: <20210809093410.59304-4-likexu@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

arch/x86/kvm/vmx/evmcs.c

@@ -14,7 +14,6 @@ DEFINE_STATIC_KEY_FALSE(enable_evmcs);
 
 #if IS_ENABLED(CONFIG_HYPERV)
 
-#define ROL16(val, n) ((u16)(((u16)(val) << (n)) | ((u16)(val) >> (16 - (n)))))
 #define EVMCS1_OFFSET(x) offsetof(struct hv_enlightened_vmcs, x)
 #define EVMCS1_FIELD(number, name, clean_field)[ROL16(number, 6)] = \
 		{EVMCS1_OFFSET(name), clean_field}

arch/x86/kvm/vmx/evmcs.h

@@ -73,8 +73,6 @@ struct evmcs_field {
 extern const struct evmcs_field vmcs_field_to_evmcs_1[];
 extern const unsigned int nr_evmcs_1_fields;
 
-#define ROL16(val, n) ((u16)(((u16)(val) << (n)) | ((u16)(val) >> (16 - (n)))))
-
 static __always_inline int get_evmcs_offset(unsigned long field,
 					    u16 *clean_field)
 {
@@ -95,8 +93,6 @@ static __always_inline int get_evmcs_offset(unsigned long field,
 	return evmcs_field->offset;
 }
 
-#undef ROL16
-
 static inline void evmcs_write64(unsigned long field, u64 value)
 {
 	u16 clean_field;

arch/x86/kvm/vmx/vmcs.h

@@ -11,6 +11,8 @@
 
 #include "capabilities.h"
 
+#define ROL16(val, n) ((u16)(((u16)(val) << (n)) | ((u16)(val) >> (16 - (n)))))
+
 struct vmcs_hdr {
 	u32 revision_id:31;
 	u32 shadow_vmcs:1;

arch/x86/kvm/vmx/vmcs12.c

@@ -2,7 +2,6 @@
 
 #include "vmcs12.h"
 
-#define ROL16(val, n) ((u16)(((u16)(val) << (n)) | ((u16)(val) >> (16 - (n)))))
 #define VMCS12_OFFSET(x) offsetof(struct vmcs12, x)
 #define FIELD(number, name)	[ROL16(number, 6)] = VMCS12_OFFSET(name)
 #define FIELD64(number, name)						\

arch/x86/kvm/vmx/vmcs12.h

@@ -364,8 +364,6 @@ static inline void vmx_check_vmcs12_offsets(void)
 extern const unsigned short vmcs_field_to_offset_table[];
 extern const unsigned int nr_vmcs12_fields;
 
-#define ROL16(val, n) ((u16)(((u16)(val) << (n)) | ((u16)(val) >> (16 - (n)))))
-
 static inline short vmcs_field_to_offset(unsigned long field)
 {
 	unsigned short offset;
@@ -385,8 +383,6 @@ static inline short vmcs_field_to_offset(unsigned long field)
 	return offset;
 }
 
-#undef ROL16
-
 static inline u64 vmcs12_read_any(struct vmcs12 *vmcs12, unsigned long field,
 				  u16 offset)
 {