um: Remove unused offset and child_err fields from stub_data

They are no longer used. Remove them.

Signed-off-by: Tiwei Bie <[email protected]>
Signed-off-by: Johannes Berg <[email protected]>

Author: btw616

arch/um/include/shared/skas/stub-data.h

@@ -53,8 +53,7 @@ struct stub_syscall {
 };
 
 struct stub_data {
-	unsigned long offset;
-	long err, child_err;
+	long err;
 
 	int syscall_data_len;
 	/* 128 leaves enough room for additional fields in the struct */