bad_inode_permission() is safe from RCU mode

return -EIO; is *not* a blocking operation, thank you very much.
Nick, what the hell have you been smoking?

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/bad_inode.c b/fs/bad_inode.c
index 9ad2369..bfcb18f 100644
--- a/fs/bad_inode.c
+++ b/fs/bad_inode.c
@@ -231,9 +231,6 @@
 
 static int bad_inode_permission(struct inode *inode, int mask, unsigned int flags)
 {
-	if (flags & IPERM_FLAG_RCU)
-		return -ECHILD;
-
 	return -EIO;
 }