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Message-ID: <490AD328.1010603@cn.fujitsu.com> Date: Fri, 31 Oct 2008 17:43:04 +0800 From: Zhaolei <zhaolei@...fujitsu.com> To: linux-kernel@...r.kernel.org CC: Ingo Molnar <mingo@...e.hu> Subject: [PATCH] Avoid duplicate running of pud_offset and pmd_offset in one_md_table_init() If !(pgd_val(*pgd) & _PAGE_PRESENT) in PAE mode, we need not get value of pmd_table again. Signed-off-by: Zhao Lei <zhaolei@...fujitsu.com> --- arch/x86/mm/init_32.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c index 8396868..7f8a2da 100644 --- a/arch/x86/mm/init_32.c +++ b/arch/x86/mm/init_32.c @@ -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); -- 1.5.5.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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