[pypy-commit] pypy default: add comment

[arigo]

Author: Armin Rigo <arigo at tunes.org>
Branch: 
Changeset: r87395:9e9d4ae8cad2
Date: 2016-09-26 18:02 +0200
http://bitbucket.org/pypy/pypy/changeset/9e9d4ae8cad2/

Log:	add comment

diff --git a/rpython/jit/backend/x86/callbuilder.py b/rpython/jit/backend/x86/callbuilder.py
--- a/rpython/jit/backend/x86/callbuilder.py
+++ b/rpython/jit/backend/x86/callbuilder.py
@@ -138,6 +138,7 @@
             # shadowstack: change 'rpy_fastgil' to 0 (it should be
             # non-zero right now).
             self.change_extra_stack_depth = False
+            # ^^ note that set_extra_stack_depth() in this case is a no-op
             css_value = imm(0)
         else:
             from rpython.memory.gctransform import asmgcroot