--- arch/x86/mm/init.c

+++ arch/x86/mm/init.c

@@ -287,25 +287,6 @@ unsigned long __init_refok init_memory_m

load_cr3(swapper_pg_dir);

#endif

-#ifdef CONFIG_X86_64

- if (!after_bootmem && !start) {

- pud_t *pud;

- pmd_t *pmd;

-

- mmu_cr4_features = read_cr4();

-

- /*

- * _brk_end cannot change anymore, but it and _end may be

- * located on different 2M pages. cleanup_highmap(), however,

- * can only consider _end when it runs, so destroy any

- * mappings beyond _brk_end here.

- */

- pud = pud_offset(pgd_offset_k(_brk_end), _brk_end);

- pmd = pmd_offset(pud, _brk_end - 1);

- while (++pmd <= pmd_offset(pud, (unsigned long)_end - 1))

- pmd_clear(pmd);

- }

-#endif

__flush_tlb_all();

if (!after_bootmem && e820_table_end > e820_table_start)