linux-kernel - [PATCH v3 18/19] test-dyndbg: tune sub-module behavior

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Date:   Wed, 25 Jan 2023 13:37:42 -0700
From:   Jim Cromie <jim.cromie@...il.com>
To:     linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        amd-gfx@...ts.freedesktop.org, intel-gvt-dev@...ts.freedesktop.org,
        intel-gfx@...ts.freedesktop.org
Cc:     jani.nikula@...el.com, ville.syrjala@...ux.intel.com,
        daniel.vetter@...ll.ch, seanpaul@...omium.org, robdclark@...il.com,
        Jim Cromie <jim.cromie@...il.com>
Subject: [PATCH v3 18/19] test-dyndbg: tune sub-module behavior

lib/test_dynamic_debug.c is used to build 2 modules:
test_dynamic_debug.ko and test_dynamic_debug_submod.ko

Define DEBUG only in the main module, not in the submod.  Its purpose
is to insure that prdbgs are enabled by default, so that a modprobe
without params actually logs something, showing that compile-time
enablement works.  This doesn't need to be repeated in the submodule.

Rather, the submodule's purpose is to prove that classmaps defined and
exported from a parent module are propagated to submodules, setting
their class'd debugs accordingly.

Signed-off-by: Jim Cromie <jim.cromie@...il.com>
---
 lib/test_dynamic_debug.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/lib/test_dynamic_debug.c b/lib/test_dynamic_debug.c
index 6b7bd35c3e15..70a1e8955ad0 100644
--- a/lib/test_dynamic_debug.c
+++ b/lib/test_dynamic_debug.c
@@ -10,10 +10,9 @@
   #define pr_fmt(fmt) "test_dd_submod: " fmt
 #else
   #define pr_fmt(fmt) "test_dd: " fmt
+  #define DEBUG	/* enable all prdbgs (plain & class'd), to log by default */
 #endif
 
-#define DEBUG /* enable all prdbgs (plain & class'd) at compiletime */
-
 #include <linux/module.h>
 
 /* run tests by reading or writing sysfs node: do_prints */
-- 
2.39.1