Switch to new stack when calling ATA function in 16bit mode.
This reduces stack usage (old dos programs don't provide much space).
diff --git a/tools/checkstack.py b/tools/checkstack.py
index 8eafa97..070bd25 100755
--- a/tools/checkstack.py
+++ b/tools/checkstack.py
@@ -13,8 +13,8 @@
import re
# List of functions we can assume are never called.
-#IGNORE = ['BX_PANIC', '__dprintf']
-IGNORE = ['BX_PANIC']
+#IGNORE = ['BX_PANIC', '__dprintf', '__send_disk_op']
+IGNORE = ['BX_PANIC', '__send_disk_op']
# Find out maximum stack usage for a function
def calcmaxstack(funcs, funcaddr):