for our company module issue.

And I have a question .

why pv_mmu_ops notify_page_enc_status_changed field is moved to reserved1 field on (4.18.0-425.13.1.el8.x86_64)?

I think pv_mmu_ops structure reserved filed may exist for compatibility.

By moving field to reserved, size reduced.

(I think notify_page_enc_status_changed location dummy field needed or must not change the location)

Is there any reson I don't know ?

4.18.0-425.3.1.el8.x86_64

crash> struct pv_mmu_ops

struct pv_mmu_ops {

unsigned long (*read_cr2)(void);

void (*notify_page_enc_status_changed)(unsigned long, int, bool);

void (*write_cr2)(unsigned long);

unsigned long (*read_cr3)(void);

void (*write_cr3)(unsigned long);

void (*activate_mm)(struct mm_struct *, struct mm_struct *);

void (*dup_mmap)(struct mm_struct *, struct mm_struct *);

void (*exit_mmap)(struct mm_struct *);

void (*flush_tlb_user)(void);

void (*flush_tlb_kernel)(void);

void (*flush_tlb_one_user)(unsigned long);

void (*flush_tlb_others)(const struct cpumask *, const struct flush_tlb_info *);

void (*tlb_remove_table)(struct mmu_gather *, void *);

int (*pgd_alloc)(struct mm_struct *);

void (*pgd_free)(struct mm_struct *, pgd_t *);

void (*alloc_pte)(struct mm_struct *, unsigned long);

void (*alloc_pmd)(struct mm_struct *, unsigned long);

void (*alloc_pud)(struct mm_struct *, unsigned long);

void (*alloc_p4d)(struct mm_struct *, unsigned long);

void (*release_pte)(unsigned long);

void (*release_pmd)(unsigned long);

void (*release_pud)(unsigned long);

void (*release_p4d)(unsigned long);

void (*set_pte)(pte_t *, pte_t);

void (*set_pte_at)(struct mm_struct *, unsigned long, pte_t *, pte_t);

void (*set_pmd)(pmd_t *, pmd_t);

pte_t (*ptep_modify_prot_start)(struct vm_area_struct *, unsigned long, pte_t *);

void (*ptep_modify_prot_commit)(struct vm_area_struct *, unsigned long, pte_t *, pte_t);

struct paravirt_callee_save pte_val;

struct paravirt_callee_save make_pte;

struct paravirt_callee_save pgd_val;

struct paravirt_callee_save make_pgd;

void (*set_pud)(pud_t *, pud_t);

struct paravirt_callee_save pmd_val;

struct paravirt_callee_save make_pmd;

struct paravirt_callee_save pud_val;

struct paravirt_callee_save make_pud;

void (*set_p4d)(p4d_t *, p4d_t);

struct paravirt_callee_save p4d_val;

struct paravirt_callee_save make_p4d;

void (*set_pgd)(pgd_t *, pgd_t);

struct pv_lazy_ops lazy_mode;

void (*set_fixmap)(unsigned int, phys_addr_t, pgprot_t);

unsigned long rh_reserved1;

unsigned long rh_reserved2;

unsigned long rh_reserved3;

unsigned long rh_reserved4;

}

SIZE: 392

4.18.0-425.13.1.el8.x86_64