mach-ux500: config Ux500 PL011 PL022 PL180 for DMA

[firefly-linux-kernel-4.4.55.git] / mm / memory.c

diff --git a/mm/memory.c b/mm/memory.c
index 32df03cf13a56a2ba1cd15de9df0f84374ffcc29..5823698c2b71a9dd79b43986c9929f2cd7485a04 100644 (file)
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -2648,6 +2648,7 @@ void unmap_mapping_range(struct address_space *mapping,
                details.last_index = ULONG_MAX;
        details.i_mmap_lock = &mapping->i_mmap_lock;
 
+       mutex_lock(&mapping->unmap_mutex);
        spin_lock(&mapping->i_mmap_lock);
 
        /* Protect against endless unmapping loops */
@@ -2664,6 +2665,7 @@ void unmap_mapping_range(struct address_space *mapping,
        if (unlikely(!list_empty(&mapping->i_mmap_nonlinear)))
                unmap_mapping_range_list(&mapping->i_mmap_nonlinear, &details);
        spin_unlock(&mapping->i_mmap_lock);
+       mutex_unlock(&mapping->unmap_mutex);
 }
 EXPORT_SYMBOL(unmap_mapping_range);
 
@@ -3051,12 +3053,6 @@ static int __do_fault(struct mm_struct *mm, struct vm_area_struct *vma,
                                goto out;
                        }
                        charged = 1;
-                       /*
-                        * Don't let another task, with possibly unlocked vma,
-                        * keep the mlocked page.
-                        */
-                       if (vma->vm_flags & VM_LOCKED)
-                               clear_page_mlock(vmf.page);
                        copy_user_highpage(page, vmf.page, address, vma);
                        __SetPageUptodate(page);
                } else {