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From: Jim Cromie <jim.cromie@gmail.com>
To: Andrew Morton <akpm@linux-foundation.org>,
	 Jason Baron <jbaron@akamai.com>,
	Luis Chamberlain <mcgrof@kernel.org>,
	 Petr Pavlu <petr.pavlu@suse.com>,
	Daniel Gomez <da.gomez@kernel.org>,
	 Sami Tolvanen <samitolvanen@google.com>,
	Aaron Tomlin <atomlin@atomlin.com>,
	 Shuah Khan <shuah@kernel.org>,
	Louis Chauvet <louis.chauvet@bootlin.com>
Cc: linux-kernel@vger.kernel.org, linux-modules@vger.kernel.org,
	 linux-kselftest@vger.kernel.org,
	Jim Cromie <jim.cromie@gmail.com>
Subject: [PATCH 04/17] dyndbg: make ddebug_class_param union members same size
Date: Mon, 04 May 2026 14:45:10 -0600	[thread overview]
Message-ID: <20260504-dd-cleanups-2-v1-4-6fdd24040642@gmail.com> (raw)
In-Reply-To: <20260504-dd-cleanups-2-v1-0-6fdd24040642@gmail.com>

struct ddebug_class_param keeps a ref to the state-storage of the
param; make both class-types use the same unsigned long storage type.

ISTM this is simpler and safer; it avoids an irrelevant difference,
and if 2 users somehow get class-type mixed up (or refer to the wrong
union member), at least they will both see the same value.

Reviewed-by: Louis Chauvet <louis.chauvet@bootlin.com>
Signed-off-by: Jim Cromie <jim.cromie@gmail.com>
---
 include/linux/dynamic_debug.h | 2 +-
 lib/dynamic_debug.c           | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/linux/dynamic_debug.h b/include/linux/dynamic_debug.h
index a10adac8e8f0..441305277914 100644
--- a/include/linux/dynamic_debug.h
+++ b/include/linux/dynamic_debug.h
@@ -104,7 +104,7 @@ struct _ddebug_info {
 struct ddebug_class_param {
 	union {
 		unsigned long *bits;
-		unsigned int *lvl;
+		unsigned long *lvl;
 	};
 	char flags[8];
 	const struct ddebug_class_map *map;
diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index a9caf84ddb22..ffa1cf7c2c72 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -811,7 +811,7 @@ int param_get_dyndbg_classes(char *buffer, const struct kernel_param *kp)
 
 	case DD_CLASS_TYPE_LEVEL_NAMES:
 	case DD_CLASS_TYPE_LEVEL_NUM:
-		return scnprintf(buffer, PAGE_SIZE, "%d\n", *dcp->lvl);
+		return scnprintf(buffer, PAGE_SIZE, "%ld\n", *dcp->lvl);
 	default:
 		return -1;
 	}

-- 
2.54.0


  parent reply	other threads:[~2026-05-04 20:45 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-05-04 20:45 [PATCH 00/17] dynamic-debug cleanups refactors maintenance Jim Cromie
2026-05-04 20:45 ` [PATCH 01/17] dyndbg: factor ddebug_match_desc out from ddebug_change Jim Cromie
2026-05-04 20:45 ` [PATCH 02/17] dyndbg: add stub macro for DECLARE_DYNDBG_CLASSMAP Jim Cromie
2026-05-04 20:45 ` [PATCH 03/17] dyndbg: reword "class unknown," to "class:_UNKNOWN_" Jim Cromie
2026-05-04 20:45 ` Jim Cromie [this message]
2026-05-04 20:45 ` [PATCH 05/17] dyndbg: drop NUM_TYPE_ARRAY Jim Cromie
2026-05-04 20:45 ` [PATCH 06/17] dyndbg: tweak pr_fmt to avoid expansion conflicts Jim Cromie
2026-05-04 20:45 ` [PATCH 07/17] dyndbg: reduce verbose/debug clutter Jim Cromie
2026-05-04 20:45 ` [PATCH 08/17] dyndbg: refactor param_set_dyndbg_classes and below Jim Cromie
2026-05-04 20:45 ` [PATCH 09/17] dyndbg: tighten fn-sig of ddebug_apply_class_bitmap Jim Cromie
2026-05-04 20:45 ` [PATCH 10/17] dyndbg: replace classmap list with a vector Jim Cromie
2026-05-04 20:45 ` [PATCH 11/17] dyndbg: macrofy a 2-index for-loop pattern Jim Cromie
2026-05-04 20:45 ` [PATCH 12/17] dyndbg,module: make proper substructs in _ddebug_info Jim Cromie
2026-05-05  8:05   ` Petr Pavlu
2026-05-04 20:45 ` [PATCH 13/17] dyndbg: move mod_name down from struct ddebug_table to _ddebug_info Jim Cromie
2026-05-04 20:45 ` [PATCH 14/17] dyndbg: hoist classmap-filter-by-modname up to ddebug_add_module Jim Cromie
2026-05-04 20:45 ` [PATCH 15/17] dyndbg-API: remove DD_CLASS_TYPE_(DISJOINT|LEVEL)_NAMES and code Jim Cromie
2026-05-04 20:45 ` [PATCH 16/17] selftests-dyndbg: add a dynamic_debug run_tests target Jim Cromie
2026-05-04 20:45 ` [PATCH 17/17] dyndbg: change __dynamic_func_call_cls* macros into expressions Jim Cromie

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