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VM: add common helper function to create the page tables

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This logic was duplicated four times, for no good reason.

Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Linus Torvalds 2005-11-29 14:03:14 -08:00
commit c9cfcddfd6
4 changed files with 19 additions and 45 deletions
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24
mm/fremap.c
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@ -55,20 +55,10 @@ int install_page(struct mm_struct *mm, struct vm_area_struct *vma,
pgoff_t size;
int err = -ENOMEM;
pte_t *pte;
pmd_t *pmd;
pud_t *pud;
pgd_t *pgd;
pte_t pte_val;
spinlock_t *ptl;
pgd = pgd_offset(mm, addr);
pud = pud_alloc(mm, pgd, addr);
if (!pud)
goto out;
pmd = pmd_alloc(mm, pud, addr);
if (!pmd)
goto out;
pte = pte_alloc_map_lock(mm, pmd, addr, &ptl);
pte = get_locked_pte(mm, addr, &ptl);
if (!pte)
goto out;
@ -110,20 +100,10 @@ int install_file_pte(struct mm_struct *mm, struct vm_area_struct *vma,
{
int err = -ENOMEM;
pte_t *pte;
pmd_t *pmd;
pud_t *pud;
pgd_t *pgd;
pte_t pte_val;
spinlock_t *ptl;
pgd = pgd_offset(mm, addr);
pud = pud_alloc(mm, pgd, addr);
if (!pud)
goto out;
pmd = pmd_alloc(mm, pud, addr);
if (!pmd)
goto out;
pte = pte_alloc_map_lock(mm, pmd, addr, &ptl);
pte = get_locked_pte(mm, addr, &ptl);
if (!pte)
goto out;