Convert SG from nopage to fault.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: Douglas Gilbert <dougg@torque.net>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 11 insertions, 12 deletions

diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index aba28f335b88..e5156aa6dd20 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -1160,23 +1160,22 @@ sg_fasync(int fd, struct file *filp, int mode)
         return (retval < 0) ? retval : 0;
 }
 
-static struct page *
-sg_vma_nopage(struct vm_area_struct *vma, unsigned long addr, int *type)
+static int
+sg_vma_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 {
         Sg_fd *sfp;
-        struct page *page = NOPAGE_SIGBUS;
         unsigned long offset, len, sa;
         Sg_scatter_hold *rsv_schp;
         struct scatterlist *sg;
         int k;
 
         if ((NULL == vma) || (!(sfp = (Sg_fd *) vma->vm_private_data)))
-                return page;
+                return VM_FAULT_SIGBUS;
         rsv_schp = &sfp->reserve;
-        offset = addr - vma->vm_start;
+        offset = vmf->pgoff << PAGE_SHIFT;
         if (offset >= rsv_schp->bufflen)
-                return page;
-        SCSI_LOG_TIMEOUT(3, printk("sg_vma_nopage: offset=%lu, scatg=%d\n",
+                return VM_FAULT_SIGBUS;
+        SCSI_LOG_TIMEOUT(3, printk("sg_vma_fault: offset=%lu, scatg=%d\n",
                                    offset, rsv_schp->k_use_sg));
         sg = rsv_schp->buffer;
         sa = vma->vm_start;
@@ -1185,21 +1184,21 @@ sg_vma_nopage(struct vm_area_struct *vma, unsigned long addr, int *type)
                 len = vma->vm_end - sa;
                 len = (len < sg->length) ? len : sg->length;
                 if (offset < len) {
+                        struct page *page;
                         page = virt_to_page(page_address(sg_page(sg)) + offset);
                         get_page(page); /* increment page count */
-                        break;
+                        vmf->page = page;
+                        return 0; /* success */
                 }
                 sa += len;
                 offset -= len;
         }
 
-        if (type)
-                *type = VM_FAULT_MINOR;
-        return page;
+        return VM_FAULT_SIGBUS;
 }
 
 static struct vm_operations_struct sg_mmap_vm_ops = {
-        .nopage = sg_vma_nopage,
+        .fault = sg_vma_fault,
 };
 
 static int