diff options
Diffstat (limited to 'arch/x86/mm')
| -rw-r--r-- | arch/x86/mm/init_64.c | 43 |
1 files changed, 0 insertions, 43 deletions
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c index b7a7992c28b6..5855449ce7aa 100644 --- a/arch/x86/mm/init_64.c +++ b/arch/x86/mm/init_64.c @@ -435,49 +435,6 @@ void __init paging_init(void) #endif /* - * Unmap a kernel mapping if it exists. This is useful to avoid - * prefetches from the CPU leading to inconsistent cache lines. - * address and size must be aligned to 2MB boundaries. - * Does nothing when the mapping doesn't exist. - */ -void __init clear_kernel_mapping(unsigned long address, unsigned long size) -{ - unsigned long end = address + size; - - BUG_ON(address & ~PMD_PAGE_MASK); - BUG_ON(size & ~PMD_PAGE_MASK); - - for (; address < end; address += PMD_PAGE_SIZE) { - pgd_t *pgd = pgd_offset_k(address); - pud_t *pud; - pmd_t *pmd; - - if (pgd_none(*pgd)) - continue; - - pud = pud_offset(pgd, address); - if (pud_none(*pud)) - continue; - - pmd = pmd_offset(pud, address); - if (!pmd || pmd_none(*pmd)) - continue; - - if (!(pmd_val(*pmd) & _PAGE_PSE)) { - /* - * Could handle this, but it should not happen - * currently: - */ - printk(KERN_ERR "clear_kernel_mapping: " - "mapping has been split. will leak memory\n"); - pmd_ERROR(*pmd); - } - set_pmd(pmd, __pmd(0)); - } - __flush_tlb_all(); -} - -/* * Memory hotplug specific functions */ void online_page(struct page *page) |