vm audit: add VM_DONTEXPAND to mmap for drivers that need it

[sfrench/cifs-2.6.git] / sound / usb / usx2y / usX2Yhwdep.c

diff --git a/sound/usb/usx2y/usX2Yhwdep.c b/sound/usb/usx2y/usX2Yhwdep.c
index 4b52d18dcd539199050bb033e4d4e7ba2e40c736..1558a5c4094faebb589c9822a37182c837867c39 100644 (file)
--- a/sound/usb/usx2y/usX2Yhwdep.c
+++ b/sound/usb/usx2y/usX2Yhwdep.c
@@ -20,7 +20,6 @@
  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  */
 
-#include <sound/driver.h>
 #include <linux/interrupt.h>
 #include <linux/usb.h>
 #include <sound/core.h>
@@ -34,34 +33,31 @@
 int usX2Y_hwdep_pcm_new(struct snd_card *card);
 
 
-static struct page * snd_us428ctls_vm_nopage(struct vm_area_struct *area, unsigned long address, int *type)
+static int snd_us428ctls_vm_fault(struct vm_area_struct *area,
+                                 struct vm_fault *vmf)
 {
        unsigned long offset;
        struct page * page;
        void *vaddr;
 
-       snd_printdd("ENTER, start %lXh, ofs %lXh, pgoff %ld, addr %lXh\n",
+       snd_printdd("ENTER, start %lXh, pgoff %ld\n",
                   area->vm_start,
-                  address - area->vm_start,
-                  (address - area->vm_start) >> PAGE_SHIFT,
-                  address);
+                  vmf->pgoff);
        
-       offset = area->vm_pgoff << PAGE_SHIFT;
-       offset += address - area->vm_start;
-       snd_assert((offset % PAGE_SIZE) == 0, return NOPAGE_OOM);
+       offset = vmf->pgoff << PAGE_SHIFT;
        vaddr = (char*)((struct usX2Ydev *)area->vm_private_data)->us428ctls_sharedmem + offset;
        page = virt_to_page(vaddr);
        get_page(page);
-       snd_printdd( "vaddr=%p made us428ctls_vm_nopage() return %p; offset=%lX\n", vaddr, page, offset);
+       vmf->page = page;
 
-       if (type)
-               *type = VM_FAULT_MINOR;
+       snd_printdd("vaddr=%p made us428ctls_vm_fault() page %p\n",
+                   vaddr, page);
 
-       return page;
+       return 0;
 }
 
 static struct vm_operations_struct us428ctls_vm_ops = {
-       .nopage = snd_us428ctls_vm_nopage,
+       .fault = snd_us428ctls_vm_fault,
 };
 
 static int snd_us428ctls_mmap(struct snd_hwdep * hw, struct file *filp, struct vm_area_struct *area)
@@ -88,7 +84,7 @@ static int snd_us428ctls_mmap(struct snd_hwdep * hw, struct file *filp, struct v
                us428->us428ctls_sharedmem->CtlSnapShotLast = -2;
        }
        area->vm_ops = &us428ctls_vm_ops;
-       area->vm_flags |= VM_RESERVED;
+       area->vm_flags |= VM_RESERVED | VM_DONTEXPAND;
        area->vm_private_data = hw->private_data;
        return 0;
 }