Add own zero_user_segment for older kernels

[yaffs2.git] / yaffs_fs.c

diff --git a/yaffs_fs.c b/yaffs_fs.c
index 39de0740d28ae2d9743f5b019188574081c93bdd..86a8e8dd39dc3b52baf093dcab6ba713b6b06366 100644 (file)
--- a/yaffs_fs.c
+++ b/yaffs_fs.c
@@ -32,7 +32,7 @@
  */
 
 const char *yaffs_fs_c_version =
  */
 
 const char *yaffs_fs_c_version =

-    "$Id: yaffs_fs.c,v 1.91 2010-01-11 04:06:46 charles Exp $";
+    "$Id: yaffs_fs.c,v 1.92 2010-01-19 21:16:30 charles Exp $";

 extern const char *yaffs_guts_c_version;
 
 #include <linux/version.h>
 extern const char *yaffs_guts_c_version;
 
 #include <linux/version.h>


@@ -324,6 +324,17 @@ static const struct file_operations yaffs_file_operations = {
 };
 #endif
 
 };
 #endif
 

+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,25))
+static void zero_user_segment(struct page *page, unsigned start, unsigned end)
+{
+       void * kaddr = kmap_atomic(page, KM_USER0);
+       memset(kaddr + start, 0, end - start);
+       kunmap_atomic(kaddr, KM_USER0);
+       flush_dcache_page(page);
+}
+#endif
+
+

 static const struct inode_operations yaffs_file_inode_operations = {
        .setattr = yaffs_setattr,
 };
 static const struct inode_operations yaffs_file_inode_operations = {
        .setattr = yaffs_setattr,
 };