[akpm@linux-foundation.org: remove unused variable]
Signed-off-by: Nick Piggin <npiggin@suse.de>
Acked-by: Jes Sorensen <jes@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
*
* Creates a mspec page and maps it to user space.
*/
*
* Creates a mspec page and maps it to user space.
*/
-static unsigned long
-mspec_nopfn(struct vm_area_struct *vma, unsigned long address)
+static int
+mspec_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
{
unsigned long paddr, maddr;
unsigned long pfn;
{
unsigned long paddr, maddr;
unsigned long pfn;
+ pgoff_t index = vmf->pgoff;
struct vma_data *vdata = vma->vm_private_data;
struct vma_data *vdata = vma->vm_private_data;
- BUG_ON(address < vdata->vm_start || address >= vdata->vm_end);
- index = (address - vdata->vm_start) >> PAGE_SHIFT;
maddr = (volatile unsigned long) vdata->maddr[index];
if (maddr == 0) {
maddr = uncached_alloc_page(numa_node_id(), 1);
if (maddr == 0)
maddr = (volatile unsigned long) vdata->maddr[index];
if (maddr == 0) {
maddr = uncached_alloc_page(numa_node_id(), 1);
if (maddr == 0)
spin_lock(&vdata->lock);
if (vdata->maddr[index] == 0) {
spin_lock(&vdata->lock);
if (vdata->maddr[index] == 0) {
pfn = paddr >> PAGE_SHIFT;
pfn = paddr >> PAGE_SHIFT;
+ /*
+ * vm_insert_pfn can fail with -EBUSY, but in that case it will
+ * be because another thread has installed the pte first, so it
+ * is no problem.
+ */
+ vm_insert_pfn(vma, (unsigned long)vmf->virtual_address, pfn);
+
+ return VM_FAULT_NOPAGE;
}
static struct vm_operations_struct mspec_vm_ops = {
.open = mspec_open,
.close = mspec_close,
}
static struct vm_operations_struct mspec_vm_ops = {
.open = mspec_open,
.close = mspec_close,