x86: update populate_extra_pte() and add populate_extra_pmd()
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>
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index 8b1a0ef..84a2688 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -137,14 +137,21 @@
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,