diff options
Diffstat (limited to 'arch/x86/mm')
| -rw-r--r-- | arch/x86/mm/init_64.c | 41 |
1 files changed, 0 insertions, 41 deletions
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c index 3f040c6e5d13..e8db4edd7cc9 100644 --- a/arch/x86/mm/init_64.c +++ b/arch/x86/mm/init_64.c @@ -1416,47 +1416,6 @@ void mark_rodata_ro(void) debug_checkwx(); } -int kern_addr_valid(unsigned long addr) -{ - unsigned long above = ((long)addr) >> __VIRTUAL_MASK_SHIFT; - pgd_t *pgd; - p4d_t *p4d; - pud_t *pud; - pmd_t *pmd; - pte_t *pte; - - if (above != 0 && above != -1UL) - return 0; - - pgd = pgd_offset_k(addr); - if (pgd_none(*pgd)) - return 0; - - p4d = p4d_offset(pgd, addr); - if (!p4d_present(*p4d)) - return 0; - - pud = pud_offset(p4d, addr); - if (!pud_present(*pud)) - return 0; - - if (pud_large(*pud)) - return pfn_valid(pud_pfn(*pud)); - - pmd = pmd_offset(pud, addr); - if (!pmd_present(*pmd)) - return 0; - - if (pmd_large(*pmd)) - return pfn_valid(pmd_pfn(*pmd)); - - pte = pte_offset_kernel(pmd, addr); - if (pte_none(*pte)) - return 0; - - return pfn_valid(pte_pfn(*pte)); -} - /* * Block size is the minimum amount of memory which can be hotplugged or * hotremoved. It must be power of two and must be equal or larger than |