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| author | Zhaolei <zhaolei@cn.fujitsu.com> | 2008-10-31 17:43:04 +0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-10-31 11:03:17 +0100 |
| commit | a376f30a95a796cde81d6dffde0f5243c8bd8f92 (patch) | |
| tree | 443b34aae8d99524ee9e7669ade05c6f06585967 /arch/x86/mm | |
| parent | 7a5276889cfa96619bf863c87581005f46139986 (diff) | |
| download | op-kernel-dev-a376f30a95a796cde81d6dffde0f5243c8bd8f92.zip op-kernel-dev-a376f30a95a796cde81d6dffde0f5243c8bd8f92.tar.gz | |
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>
Diffstat (limited to 'arch/x86/mm')
| -rw-r--r-- | 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); |
