linux-kernel - [PATCH v4 03/58] test-dyndbg: fixup CLASSMAP usage error

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Message-ID: <20250803035816.603405-4-jim.cromie@gmail.com>
Date: Sat,  2 Aug 2025 21:57:21 -0600
From: Jim Cromie <jim.cromie@...il.com>
To: linux-kernel@...r.kernel.org,
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Subject: [PATCH v4 03/58] test-dyndbg: fixup CLASSMAP usage error

commit 6ea3bf466ac6 ("dyndbg: test DECLARE_DYNDBG_CLASSMAP, sysfs nodes")

A closer look at test_dynamic_debug.ko logging output reveals a macro
usage error:

lib/test_dynamic_debug.c:105 [test_dynamic_debug]do_cats =p "LOW msg\n" class:MID
lib/test_dynamic_debug.c:106 [test_dynamic_debug]do_cats =p "MID msg\n" class:HI
lib/test_dynamic_debug.c:107 [test_dynamic_debug]do_cats =_ "HI msg\n" class unknown, _id:13

107 says: HI is unknown, and 105,106 have a LOW/MID and MID/HI skew.

DECLARE_DYNDBG_CLASSMAP() _base arg must equal the enum's 1st value,
in this case it was _base + 1.  This leaves HI class un-selectable.

NB: the macro could better validate its arguments.

Signed-off-by: Jim Cromie <jim.cromie@...il.com>
Reviewed-by: Louis Chauvet <louis.chauvet@...tlin.com>
Tested-by: Louis Chauvet<louis.chauvet@...tlin.com>
---
 lib/test_dynamic_debug.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/test_dynamic_debug.c b/lib/test_dynamic_debug.c
index 77c2a669b6afd..396144cf351be 100644
--- a/lib/test_dynamic_debug.c
+++ b/lib/test_dynamic_debug.c
@@ -75,7 +75,7 @@ DD_SYS_WRAP(disjoint_bits, p);
 DD_SYS_WRAP(disjoint_bits, T);
 
 /* symbolic input, independent bits */
-enum cat_disjoint_names { LOW = 11, MID, HI };
+enum cat_disjoint_names { LOW = 10, MID, HI };
 DECLARE_DYNDBG_CLASSMAP(map_disjoint_names, DD_CLASS_TYPE_DISJOINT_NAMES, 10,
 			"LOW", "MID", "HI");
 DD_SYS_WRAP(disjoint_names, p);
-- 
2.50.1