x86/xen: make some functions static

Some functions and variables in arch/x86/xen are used locally only,
make them static.
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Message-ID: <20240710093718.14552-2-jgross@suse.com>
Signed-off-by: Juergen Gross <jgross@suse.com>

arch/x86/xen/mmu.h

@@ -17,10 +17,6 @@ bool __set_phys_to_machine(unsigned long pfn, unsigned long mfn);
 
 void set_pte_mfn(unsigned long vaddr, unsigned long pfn, pgprot_t flags);
 
-pte_t xen_ptep_modify_prot_start(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep);
-void  xen_ptep_modify_prot_commit(struct vm_area_struct *vma, unsigned long addr,
-				  pte_t *ptep, pte_t pte);
-
 unsigned long xen_read_cr2_direct(void);
 
 extern void xen_init_mmu_ops(void);

arch/x86/xen/mmu_pv.c

@@ -128,7 +128,7 @@ static DEFINE_SPINLOCK(xen_reservation_lock);
  * looking at another vcpu's cr3 value, it should use this variable.
  */
 DEFINE_PER_CPU(unsigned long, xen_cr3);	 /* cr3 stored as physaddr */
-DEFINE_PER_CPU(unsigned long, xen_current_cr3);	 /* actual vcpu cr3 */
+static DEFINE_PER_CPU(unsigned long, xen_current_cr3);	/* actual vcpu cr3 */
 
 static phys_addr_t xen_pt_base, xen_pt_size __initdata;
 
@@ -305,7 +305,7 @@ static void xen_set_pte(pte_t *ptep, pte_t pteval)
 	__xen_set_pte(ptep, pteval);
 }
 
-pte_t xen_ptep_modify_prot_start(struct vm_area_struct *vma,
+static pte_t xen_ptep_modify_prot_start(struct vm_area_struct *vma,
 					unsigned long addr, pte_t *ptep)
 {
 	/* Just return the pte as-is.  We preserve the bits on commit */
@@ -313,7 +313,8 @@ pte_t xen_ptep_modify_prot_start(struct vm_area_struct *vma,
 	return *ptep;
 }
 
-void xen_ptep_modify_prot_commit(struct vm_area_struct *vma, unsigned long addr,
+static void xen_ptep_modify_prot_commit(struct vm_area_struct *vma,
+					unsigned long addr,
 					pte_t *ptep, pte_t pte)
 {
 	struct mmu_update u;

arch/x86/xen/xen-ops.h

@@ -23,7 +23,6 @@ void xen_copy_trap_info(struct trap_info *traps);
 
 DECLARE_PER_CPU_ALIGNED(struct vcpu_info, xen_vcpu_info);
 DECLARE_PER_CPU(unsigned long, xen_cr3);
-DECLARE_PER_CPU(unsigned long, xen_current_cr3);
 
 extern struct start_info *xen_start_info;
 extern struct shared_info xen_dummy_shared_info;