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-rw-r--r--fs/exec.c14
1 files changed, 5 insertions, 9 deletions
diff --git a/fs/exec.c b/fs/exec.c
index 9bb55c8..ba73797 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -309,25 +309,24 @@ void install_arg_page(struct vm_area_struct *vma,
pud_t * pud;
pmd_t * pmd;
pte_t * pte;
+ spinlock_t *ptl;
if (unlikely(anon_vma_prepare(vma)))
- goto out_sig;
+ goto out;
flush_dcache_page(page);
pgd = pgd_offset(mm, address);
-
- spin_lock(&mm->page_table_lock);
pud = pud_alloc(mm, pgd, address);
if (!pud)
goto out;
pmd = pmd_alloc(mm, pud, address);
if (!pmd)
goto out;
- pte = pte_alloc_map(mm, pmd, address);
+ pte = pte_alloc_map_lock(mm, pmd, address, &ptl);
if (!pte)
goto out;
if (!pte_none(*pte)) {
- pte_unmap(pte);
+ pte_unmap_unlock(pte, ptl);
goto out;
}
inc_mm_counter(mm, anon_rss);
@@ -335,14 +334,11 @@ void install_arg_page(struct vm_area_struct *vma,
set_pte_at(mm, address, pte, pte_mkdirty(pte_mkwrite(mk_pte(
page, vma->vm_page_prot))));
page_add_anon_rmap(page, vma, address);
- pte_unmap(pte);
- spin_unlock(&mm->page_table_lock);
+ pte_unmap_unlock(pte, ptl);
/* no need for flush_tlb */
return;
out:
- spin_unlock(&mm->page_table_lock);
-out_sig:
__free_page(page);
force_sig(SIGKILL, current);
}
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