Commit a376f30a authored Oct 31, 2008 by Zhaolei Committed by Ingo Molnar Oct 31, 2008

x86: avoid duplicate running of pud_offset and pmd_offset in one_md_table_init()



Impact: simplify implementation, cleanup

If !(pgd_val(*pgd) & _PAGE_PRESENT) in PAE mode, we need not get value of
pmd_table again.

Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

parent 7a527688

arch/x86/mm/init_32.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -102,6 +102,8 @@ static pmd_t * __init one_md_table_init(pgd_t *pgd)
		set_pgd(pgd, __pgd(__pa(pmd_table) \| _PAGE_PRESENT));
		pud = pud_offset(pgd, 0);
		BUG_ON(pmd_table != pmd_offset(pud, 0));

		return pmd_table;
		}
		#endif
		pud = pud_offset(pgd, 0);