[PATCH] fadvise: remove dead comments

[linux-2.6-microblaze.git] / mm / fadvise.c

diff --git a/mm/fadvise.c b/mm/fadvise.c
index 907c392..60a5d55 100644 (file)
--- a/mm/fadvise.c
+++ b/mm/fadvise.c
@@ -23,29 +23,6 @@
 /*
  * POSIX_FADV_WILLNEED could set PG_Referenced, and POSIX_FADV_NOREUSE could
  * deactivate the pages and clear PG_Referenced.
- *
- * LINUX_FADV_ASYNC_WRITE: start async writeout of any dirty pages between file
- * offsets `offset' and `offset+len' inclusive.  Any pages which are currently
- * under writeout are skipped, whether or not they are dirty.
- *
- * LINUX_FADV_WRITE_WAIT: wait upon writeout of any dirty pages between file
- * offsets `offset' and `offset+len'.
- *
- * By combining these two operations the application may do several things:
- *
- * LINUX_FADV_ASYNC_WRITE: push some or all of the dirty pages at the disk.
- *
- * LINUX_FADV_WRITE_WAIT, LINUX_FADV_ASYNC_WRITE: push all of the currently
- * dirty pages at the disk.
- *
- * LINUX_FADV_WRITE_WAIT, LINUX_FADV_ASYNC_WRITE, LINUX_FADV_WRITE_WAIT: push
- * all of the currently dirty pages at the disk, wait until they have been
- * written.
- *
- * It should be noted that none of these operations write out the file's
- * metadata.  So unless the application is strictly performing overwrites of
- * already-instantiated disk blocks, there are no guarantees here that the data
- * will be available after a crash.
  */
 asmlinkage long sys_fadvise64_64(int fd, loff_t offset, loff_t len, int advice)
 {
@@ -129,15 +106,6 @@ asmlinkage long sys_fadvise64_64(int fd, loff_t offset, loff_t len, int advice)
                        invalidate_mapping_pages(mapping, start_index,
                                                end_index);
                break;
-       case LINUX_FADV_ASYNC_WRITE:
-               ret = __filemap_fdatawrite_range(mapping, offset, endbyte,
-                                               WB_SYNC_NONE);
-               break;
-       case LINUX_FADV_WRITE_WAIT:
-               ret = wait_on_page_writeback_range(mapping,
-                                       offset >> PAGE_CACHE_SHIFT,
-                                       endbyte >> PAGE_CACHE_SHIFT);
-               break;
        default:
                ret = -EINVAL;
        }