[PATCH] mm: arches skip ptlock

[~andy/linux] / arch / um / kernel / skas / mmu.c

diff --git a/arch/um/kernel/skas/mmu.c b/arch/um/kernel/skas/mmu.c
index 240143b616a2c359629492e38fcfa8056732aa78..02cf36e0331a2b8b14f8741febd329df9bb888e3 100644 (file)
--- a/arch/um/kernel/skas/mmu.c
+++ b/arch/um/kernel/skas/mmu.c
@@ -28,7 +28,6 @@ static int init_stub_pte(struct mm_struct *mm, unsigned long proc,
        pmd_t *pmd;
        pte_t *pte;
 
-       spin_lock(&mm->page_table_lock);
        pgd = pgd_offset(mm, proc);
        pud = pud_alloc(mm, pgd, proc);
        if (!pud)
@@ -63,7 +62,6 @@ static int init_stub_pte(struct mm_struct *mm, unsigned long proc,
        *pte = mk_pte(virt_to_page(kernel), __pgprot(_PAGE_PRESENT));
        *pte = pte_mkexec(*pte);
        *pte = pte_wrprotect(*pte);
-       spin_unlock(&mm->page_table_lock);
        return(0);
 
  out_pmd:
@@ -71,7 +69,6 @@ static int init_stub_pte(struct mm_struct *mm, unsigned long proc,
  out_pte:
        pmd_free(pmd);
  out:
-       spin_unlock(&mm->page_table_lock);
        return(-ENOMEM);
 }