X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=mm%2Ffadvise.c;h=e43359214f6ff15020b6f05cc07aa5e6ddcb4162;hb=f2badb0c950ed308be9b321203b9c8d341690cd4;hp=907c39257ca06aea630915c9a46103518a4d631a;hpb=ebcf28e1c7a295f3321249dd235ad2e45938fdd9;p=safe%2Fjmp%2Flinux-2.6

diff --git a/mm/fadvise.c b/mm/fadvise.c
index 907c392..e433592 100644
--- a/mm/fadvise.c
+++ b/mm/fadvise.c
@@ -3,7 +3,7 @@
  *
  * Copyright (C) 2002, Linus Torvalds
  *
- * 11Jan2003	akpm@digeo.com
+ * 11Jan2003	Andrew Morton
  *		Initial version.
  */
 
@@ -23,31 +23,8 @@
 /*
  * 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)
+SYSCALL_DEFINE(fadvise64_64)(int fd, loff_t offset, loff_t len, int advice)
 {
 	struct file *file = fget(fd);
 	struct address_space *mapping;
@@ -61,7 +38,7 @@ asmlinkage long sys_fadvise64_64(int fd, loff_t offset, loff_t len, int advice)
 	if (!file)
 		return -EBADF;
 
-	if (S_ISFIFO(file->f_dentry->d_inode->i_mode)) {
+	if (S_ISFIFO(file->f_path.dentry->d_inode->i_mode)) {
 		ret = -ESPIPE;
 		goto out;
 	}
@@ -72,9 +49,21 @@ asmlinkage long sys_fadvise64_64(int fd, loff_t offset, loff_t len, int advice)
 		goto out;
 	}
 
-	if (mapping->a_ops->get_xip_page)
-		/* no bad return value, but ignore advice */
+	if (mapping->a_ops->get_xip_mem) {
+		switch (advice) {
+		case POSIX_FADV_NORMAL:
+		case POSIX_FADV_RANDOM:
+		case POSIX_FADV_SEQUENTIAL:
+		case POSIX_FADV_WILLNEED:
+		case POSIX_FADV_NOREUSE:
+		case POSIX_FADV_DONTNEED:
+			/* no bad return value, but ignore advice */
+			break;
+		default:
+			ret = -EINVAL;
+		}
 		goto out;
+	}
 
 	/* Careful about overflows. Len == 0 means "as much as possible" */
 	endbyte = offset + len;
@@ -96,7 +85,6 @@ asmlinkage long sys_fadvise64_64(int fd, loff_t offset, loff_t len, int advice)
 		file->f_ra.ra_pages = bdi->ra_pages * 2;
 		break;
 	case POSIX_FADV_WILLNEED:
-	case POSIX_FADV_NOREUSE:
 		if (!mapping->a_ops->readpage) {
 			ret = -EINVAL;
 			break;
@@ -113,10 +101,12 @@ asmlinkage long sys_fadvise64_64(int fd, loff_t offset, loff_t len, int advice)
 		
 		ret = force_page_cache_readahead(mapping, file,
 				start_index,
-				max_sane_readahead(nrpages));
+				nrpages);
 		if (ret > 0)
 			ret = 0;
 		break;
+	case POSIX_FADV_NOREUSE:
+		break;
 	case POSIX_FADV_DONTNEED:
 		if (!bdi_write_congested(mapping->backing_dev_info))
 			filemap_flush(mapping);
@@ -129,15 +119,6 @@ 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;
 	}
@@ -145,12 +126,26 @@ out:
 	fput(file);
 	return ret;
 }
+#ifdef CONFIG_HAVE_SYSCALL_WRAPPERS
+asmlinkage long SyS_fadvise64_64(long fd, loff_t offset, loff_t len, long advice)
+{
+	return SYSC_fadvise64_64((int) fd, offset, len, (int) advice);
+}
+SYSCALL_ALIAS(sys_fadvise64_64, SyS_fadvise64_64);
+#endif
 
 #ifdef __ARCH_WANT_SYS_FADVISE64
 
-asmlinkage long sys_fadvise64(int fd, loff_t offset, size_t len, int advice)
+SYSCALL_DEFINE(fadvise64)(int fd, loff_t offset, size_t len, int advice)
 {
 	return sys_fadvise64_64(fd, offset, len, advice);
 }
+#ifdef CONFIG_HAVE_SYSCALL_WRAPPERS
+asmlinkage long SyS_fadvise64(long fd, loff_t offset, long len, long advice)
+{
+	return SYSC_fadvise64((int) fd, offset, (size_t)len, (int)advice);
+}
+SYSCALL_ALIAS(sys_fadvise64, SyS_fadvise64);
+#endif
 
 #endif