[ALSA] snd-bt87x: Power down audio ADC when not in use

[safe/jmp/linux-2.6] / mm / fremap.c

diff --git a/mm/fremap.c b/mm/fremap.c
index 5f50d73..95bcb56 100644 (file)
--- a/mm/fremap.c
+++ b/mm/fremap.c
@@ -160,7 +160,7 @@ asmlinkage long sys_remap_file_pages(unsigned long start, unsigned long size,
        if (vma->vm_private_data && !(vma->vm_flags & VM_NONLINEAR))
                goto out;
 
-       if (!vma->vm_flags & VM_CAN_NONLINEAR)
+       if (!(vma->vm_flags & VM_CAN_NONLINEAR))
                goto out;
 
        if (end <= start || start < vma->vm_start || end > vma->vm_end)
@@ -181,6 +181,25 @@ asmlinkage long sys_remap_file_pages(unsigned long start, unsigned long size,
                        goto retry;
                }
                mapping = vma->vm_file->f_mapping;
+               /*
+                * page_mkclean doesn't work on nonlinear vmas, so if
+                * dirty pages need to be accounted, emulate with linear
+                * vmas.
+                */
+               if (mapping_cap_account_dirty(mapping)) {
+                       unsigned long addr;
+
+                       flags &= MAP_NONBLOCK;
+                       addr = mmap_region(vma->vm_file, start, size,
+                                       flags, vma->vm_flags, pgoff, 1);
+                       if (IS_ERR_VALUE(addr)) {
+                               err = addr;
+                       } else {
+                               BUG_ON(addr != start);
+                               err = 0;
+                       }
+                       goto out;
+               }
                spin_lock(&mapping->i_mmap_lock);
                flush_dcache_mmap_lock(mapping);
                vma->vm_flags |= VM_NONLINEAR;