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x86: update populate_extra_pte() and add populate_extra_pmd()

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Impact: minor change to populate_extra_pte() and addition of pmd flavor

Update populate_extra_pte() to return pointer to the pte_t for the
specified address and add populate_extra_pmd() which only populates
till the pmd and returns pointer to the pmd entry for the address.

For 64bit, pud/pmd/pte fill functions are separated out from
set_pte_vaddr[_pud]() and used for set_pte_vaddr[_pud]() and
populate_extra_{pte|pmd}().

Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Tejun Heo
2009-02-24 11:57:21 +09:00
parent c0c0a29379
commit 458a3e644c
4 changed files with 67 additions and 39 deletions
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13
arch/x86/mm/init_32.c
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@@ -137,14 +137,21 @@ static pte_t * __init one_page_table_init(pmd_t *pmd)
return pte_offset_kernel(pmd, 0);
}
void __init populate_extra_pte(unsigned long vaddr)
pmd_t * __init populate_extra_pmd(unsigned long vaddr)
{
int pgd_idx = pgd_index(vaddr);
int pmd_idx = pmd_index(vaddr);
return one_md_table_init(swapper_pg_dir + pgd_idx) + pmd_idx;
}
pte_t * __init populate_extra_pte(unsigned long vaddr)
{
int pte_idx = pte_index(vaddr);
pmd_t *pmd;
pmd = one_md_table_init(swapper_pg_dir + pgd_idx);
one_page_table_init(pmd + pmd_idx);
pmd = populate_extra_pmd(vaddr);
return one_page_table_init(pmd) + pte_idx;
}
static pte_t *__init page_table_kmap_check(pte_t *pte, pmd_t *pmd,