[PATCH] scripts/gdb: fix usage of MOD_TEXT not defined when CONFIG_MODULES=n

[Clément Léger]

MOD_TEXT is only defined if CONFIG_MODULES=y which lead to loading failure
of the gdb scripts when kernel is built without CONFIG_MODULES=y:

Reading symbols from vmlinux...
Traceback (most recent call last):
  File "/foo/vmlinux-gdb.py", line 25, in <module>
    import linux.constants
  File "/foo/scripts/gdb/linux/constants.py", line 14, in <module>
    LX_MOD_TEXT = gdb.parse_and_eval("MOD_TEXT")
                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
gdb.error: No symbol "MOD_TEXT" in current context.

Add a conditional check on CONFIG_MODULES to fix this error.

Fixes: b4aff7513df3 ("scripts/gdb: use mem instead of core_layout to get the module address")
Signed-off-by: Clément Léger <cleger@xxxxxxxxxxxx>
---
 scripts/gdb/linux/constants.py.in | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/scripts/gdb/linux/constants.py.in b/scripts/gdb/linux/constants.py.in
index 50a92c4e9984..866015547b38 100644
--- a/scripts/gdb/linux/constants.py.in
+++ b/scripts/gdb/linux/constants.py.in
@@ -63,7 +63,8 @@ LX_GDBPARSED(IRQD_LEVEL)
 LX_GDBPARSED(IRQ_HIDDEN)
 
 /* linux/module.h */
-LX_GDBPARSED(MOD_TEXT)
+if IS_BUILTIN(CONFIG_MODULES):
+    LX_GDBPARSED(MOD_TEXT)
 
 /* linux/mount.h */
 LX_VALUE(MNT_NOSUID)
-- 
2.40.1