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| author | venkatesh.pallipadi@intel.com <venkatesh.pallipadi@intel.com> | 2008-12-19 22:47:28 +0100 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2008-12-20 00:40:30 +0100 |
| commit | 982d789ab76c8a11426852fec2fdf2f412e21c0c (patch) | |
| tree | 41e6932764facecb11bc9ca831ffd67ded384d68 /mm | |
| parent | x86: PAT: modify follow_phys to return phys_addr prot and return value (diff) | |
| download | linux-982d789ab76c8a11426852fec2fdf2f412e21c0c.tar.xz linux-982d789ab76c8a11426852fec2fdf2f412e21c0c.zip | |
x86: PAT: remove follow_pfnmap_pte in favor of follow_phys
Impact: Cleanup - removes a new function in favor of a recently modified older one.
Replace follow_pfnmap_pte in pat code with follow_phys. follow_phys lso
returns protection eliminating the need of pte_pgprot call. Using follow_phys
also eliminates the need for pte_pa.
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/memory.c | 43 |
1 files changed, 0 insertions, 43 deletions
diff --git a/mm/memory.c b/mm/memory.c index 79f28e35d4fc..6b29f39a5a3e 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -1168,49 +1168,6 @@ no_page_table: return page; } -int follow_pfnmap_pte(struct vm_area_struct *vma, unsigned long address, - pte_t *ret_ptep) -{ - pgd_t *pgd; - pud_t *pud; - pmd_t *pmd; - pte_t *ptep, pte; - spinlock_t *ptl; - struct page *page; - struct mm_struct *mm = vma->vm_mm; - - if (!is_pfn_mapping(vma)) - goto err; - - page = NULL; - pgd = pgd_offset(mm, address); - if (pgd_none(*pgd) || unlikely(pgd_bad(*pgd))) - goto err; - - pud = pud_offset(pgd, address); - if (pud_none(*pud) || unlikely(pud_bad(*pud))) - goto err; - - pmd = pmd_offset(pud, address); - if (pmd_none(*pmd) || unlikely(pmd_bad(*pmd))) - goto err; - - ptep = pte_offset_map_lock(mm, pmd, address, &ptl); - - pte = *ptep; - if (!pte_present(pte)) - goto err_unlock; - - *ret_ptep = pte; - pte_unmap_unlock(ptep, ptl); - return 0; - -err_unlock: - pte_unmap_unlock(ptep, ptl); -err: - return -EINVAL; -} - /* Can we do the FOLL_ANON optimization? */ static inline int use_zero_page(struct vm_area_struct *vma) { |