1 files changed, 10 insertions, 11 deletions

diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
index 452e71a1b753..6690269f5dde 100644
--- a/fs/ceph/addr.c
+++ b/fs/ceph/addr.c
@@ -205,7 +205,7 @@ static int readpage_nounlock(struct file *filp, struct page *page)
         dout("readpage inode %p file %p page %p index %lu\n",
              inode, filp, page, page->index);
         err = ceph_osdc_readpages(osdc, ceph_vino(inode), &ci->i_layout,
-                                  page->index << PAGE_CACHE_SHIFT, &len,
+                                  (u64) page_offset(page), &len,
                                   ci->i_truncate_seq, ci->i_truncate_size,
                                   &page, 1, 0);
         if (err == -ENOENT)
@@ -286,7 +286,7 @@ static int start_read(struct inode *inode, struct list_head *page_list, int max)
         int nr_pages = 0;
         int ret;
 
-        off = page->index << PAGE_CACHE_SHIFT;
+        off = (u64) page_offset(page);
 
         /* count pages */
         next_index = page->index;
@@ -308,8 +308,8 @@ static int start_read(struct inode *inode, struct list_head *page_list, int max)
                                     NULL, 0,
                                     ci->i_truncate_seq, ci->i_truncate_size,
                                     NULL, false, 1, 0);
-        if (!req)
-                return -ENOMEM;
+        if (IS_ERR(req))
+                return PTR_ERR(req);
 
         /* build page vector */
         nr_pages = len >> PAGE_CACHE_SHIFT;
@@ -426,7 +426,7 @@ static int writepage_nounlock(struct page *page, struct writeback_control *wbc)
         struct ceph_inode_info *ci;
         struct ceph_fs_client *fsc;
         struct ceph_osd_client *osdc;
-        loff_t page_off = page->index << PAGE_CACHE_SHIFT;
+        loff_t page_off = page_offset(page);
         int len = PAGE_CACHE_SIZE;
         loff_t i_size;
         int err = 0;
@@ -817,8 +817,7 @@ get_more_pages:
                         /* ok */
                         if (locked_pages == 0) {
                                 /* prepare async write request */
-                                offset = (unsigned long long)page->index
-                                        << PAGE_CACHE_SHIFT;
+                                offset = (u64) page_offset(page);
                                 len = wsize;
                                 req = ceph_osdc_new_request(&fsc->client->osdc,
                                             &ci->i_layout,
@@ -832,8 +831,8 @@ get_more_pages:
                                             ci->i_truncate_size,
                                             &inode->i_mtime, true, 1, 0);
 
-                                if (!req) {
-                                        rc = -ENOMEM;
+                                if (IS_ERR(req)) {
+                                        rc = PTR_ERR(req);
                                         unlock_page(page);
                                         break;
                                 }
@@ -1180,7 +1179,7 @@ static int ceph_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
         struct inode *inode = vma->vm_file->f_dentry->d_inode;
         struct page *page = vmf->page;
         struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc;
-        loff_t off = page->index << PAGE_CACHE_SHIFT;
+        loff_t off = page_offset(page);
         loff_t size, len;
         int ret;
 
@@ -1225,6 +1224,7 @@ out:
 static struct vm_operations_struct ceph_vmops = {
         .fault          = filemap_fault,
         .page_mkwrite   = ceph_page_mkwrite,
+        .remap_pages    = generic_file_remap_pages,
 };
 
 int ceph_mmap(struct file *file, struct vm_area_struct *vma)
@@ -1235,6 +1235,5 @@ int ceph_mmap(struct file *file, struct vm_area_struct *vma)
                 return -ENOEXEC;
         file_accessed(file);
         vma->vm_ops = &ceph_vmops;
-        vma->vm_flags |= VM_CAN_NONLINEAR;
         return 0;
 }