X-Git-Url: http://git.cascardo.info/?a=blobdiff_plain;f=Documentation%2Ffilesystems%2Fporting;h=b1bd05ea66b2d42fae1fcc34d5ddb91ead15eed5;hb=a74306fe94c82429fd0ec9f4316de90b405012d2;hp=a5fb89cac615c1c3fe0091b602932dcf29c9dc9d;hpb=2869576d0f531757f0dc6897f5f6578b3ad7c6c1;p=cascardo%2Flinux.git

diff --git a/Documentation/filesystems/porting b/Documentation/filesystems/porting
index a5fb89cac615..b1bd05ea66b2 100644
--- a/Documentation/filesystems/porting
+++ b/Documentation/filesystems/porting
@@ -585,3 +585,10 @@ in your dentry operations instead.
 	in the instances.  Rationale: !@#!@# security_d_instantiate() needs to be
 	called before we attach dentry to inode and !@#!@##!@$!$#!@#$!@$!@$ smack
 	->d_instantiate() uses not just ->getxattr() but ->setxattr() as well.
+--
+[mandatory]
+	->d_compare() doesn't get parent as a separate argument anymore.  If you
+	used it for finding the struct super_block involved, dentry->d_sb will
+	work just as well; if it's something more complicated, use dentry->d_parent.
+	Just be careful not to assume that fetching it more than once will yield
+	the same value - in RCU mode it could change under you.