NFS: use generic_write_checks() to sanity check direct writes

[cascardo/linux.git] / fs / exec.c

diff --git a/fs/exec.c b/fs/exec.c
index 1f8a9fd..e75a954 100644 (file)
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -306,9 +306,6 @@ void install_arg_page(struct vm_area_struct *vma,
                        struct page *page, unsigned long address)
 {
        struct mm_struct *mm = vma->vm_mm;
-       pgd_t * pgd;
-       pud_t * pud;
-       pmd_t * pmd;
        pte_t * pte;
        spinlock_t *ptl;
 
@@ -316,14 +313,7 @@ void install_arg_page(struct vm_area_struct *vma,
                goto out;
 
        flush_dcache_page(page);
-       pgd = pgd_offset(mm, address);
-       pud = pud_alloc(mm, pgd, address);
-       if (!pud)
-               goto out;
-       pmd = pmd_alloc(mm, pud, address);
-       if (!pmd)
-               goto out;
-       pte = pte_alloc_map_lock(mm, pmd, address, &ptl);
+       pte = get_locked_pte(mm, address, &ptl);
        if (!pte)
                goto out;
        if (!pte_none(*pte)) {
@@ -334,7 +324,7 @@ void install_arg_page(struct vm_area_struct *vma,
        lru_cache_add_active(page);
        set_pte_at(mm, address, pte, pte_mkdirty(pte_mkwrite(mk_pte(
                                        page, vma->vm_page_prot))));
-       page_add_anon_rmap(page, vma, address);
+       page_add_new_anon_rmap(page, vma, address);
        pte_unmap_unlock(pte, ptl);
 
        /* no need for flush_tlb */