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kernel add
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#ifndef _ASM_X86_INIT_H
#define _ASM_X86_INIT_H
struct x86_mapping_info {
void *(*alloc_pgt_page)(void *); /* allocate buf for page table */
void *context; /* context for alloc_pgt_page */
unsigned long pmd_flag; /* page flag for PMD entry */
bool kernel_mapping; /* kernel mapping or ident mapping */
};
int kernel_ident_mapping_init(struct x86_mapping_info *info, pgd_t *pgd_page,
unsigned long addr, unsigned long end);
#endif /* _ASM_X86_INIT_H */
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