From: Jim Cromie via B4 Relay <devnull+jim.cromie.gmail.com@kernel.org>
To: Jason Baron <jbaron@akamai.com>, Shuah Khan <shuah@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Maxime Ripard <mripard@kernel.org>,
Thomas Zimmermann <tzimmermann@suse.de>,
David Airlie <airlied@gmail.com>,
Simona Vetter <simona@ffwll.ch>, Arnd Bergmann <arnd@arndb.de>,
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>,
Jonathan Corbet <corbet@net.net>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Nathan Chancellor <nathan@kernel.org>,
Nicolas Schier <nsc@kernel.org>,
Shuah Khan <skhan@linuxfoundation.org>,
Randy Dunlap <rdunlap@infradead.org>,
"Rafael J. Wysocki" <rafael@kernel.org>,
Pavel Machek <pavel@kernel.org>, Len Brown <lenb@kernel.org>
Cc: linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org,
dri-devel@lists.freedesktop.org, linux-arch@vger.kernel.org,
linux-modules@vger.kernel.org, linux-doc@vger.kernel.org,
linux-kbuild@vger.kernel.org, linux-pm@vger.kernel.org,
Jim Cromie <jim.cromie@gmail.com>,
Philipp Hahn <phahn-oss@avm.de>
Subject: [PATCH v10 35/38] dyndbg: Ignore additional arguments from pr_fmt
Date: Wed, 16 Sep 2026 09:33:27 -0600 [thread overview]
Message-ID: <20260916-dd-cmap-part2-clean-v10-35-af4cf4767707@gmail.com> (raw)
In-Reply-To: <20260916-dd-cmap-part2-clean-v10-0-af4cf4767707@gmail.com>
From: Philipp Hahn <phahn-oss@avm.de>
pr_fmt can be used to add a common prefix to any output from a module:
#define pr_fmt(fmt) KBUILD_MODNAME ".%s " fmt, __func__
But adding additional arguments breaks dynamic debug:
> error: macro "DEFINE_DYNAMIC_DEBUG_METADATA_CLS" passed 4 arguments, but takes just 3
> | pr_debug_ratelimited("%s", "Hello world!");
> | ^
> note: macro "DEFINE_DYNAMIC_DEBUG_METADATA_CLS" defined here
> | #define DEFINE_DYNAMIC_DEBUG_METADATA_CLS(name, cls, fmt) \
> |
> error: ‘DEFINE_DYNAMIC_DEBUG_METADATA_CLS’ undeclared (first use in this function)
> | DEFINE_DYNAMIC_DEBUG_METADATA_CLS(name, _DPRINTK_CLASS_DFLT, fmt)
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> note: in expansion of macro ‘DEFINE_DYNAMIC_DEBUG_METADATA’
> | DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, pr_fmt(fmt)); \
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> note: in expansion of macro ‘pr_debug_ratelimited’
> | pr_debug_ratelimited("%s", "Hello world!");
> | ^~~~~~~~~~~~~~~~~~~~
Add an additional ', ...' to DEFINE_DYNAMIC_DEBUG_METADATA_CLS to slurp
any additional argument, which `pr_fmt` might add.
Signed-off-by: Philipp Hahn <phahn-oss@avm.de>
[pr_fmt change on test_dynamic_debug_submod instead of parent]
Reviewed-by: Jim Cromie <jim.cromie@gmail.com>
---
v10:
. pass raw fmt to DEFINE_DYNAMIC_DEBUG_METADATA in pr_debug_ratelimited().
---
include/linux/dynamic_debug.h | 2 +-
include/linux/printk.h | 2 +-
lib/test_dynamic_debug.c | 4 ++--
.../selftests/dynamic_debug/dyndbg_selftest.sh | 26 +++++++++++-----------
4 files changed, 17 insertions(+), 17 deletions(-)
diff --git a/include/linux/dynamic_debug.h b/include/linux/dynamic_debug.h
index 2542d7c41b3e..d94ad3a2018a 100644
--- a/include/linux/dynamic_debug.h
+++ b/include/linux/dynamic_debug.h
@@ -359,7 +359,7 @@ void __dynamic_ibdev_dbg(struct _ddebug *descriptor,
dump_stack(); \
}
-#define DEFINE_DYNAMIC_DEBUG_METADATA_CLS(name, cls, fmt) \
+#define DEFINE_DYNAMIC_DEBUG_METADATA_CLS(name, cls, fmt, ...) \
static struct _ddebug __aligned(8) \
__section("__dyndbg_descs") name = { \
.modname = DDEBUG_MODNAME, \
diff --git a/include/linux/printk.h b/include/linux/printk.h
index f594c1266bfd..5d701952e739 100644
--- a/include/linux/printk.h
+++ b/include/linux/printk.h
@@ -742,7 +742,7 @@ do { \
static DEFINE_RATELIMIT_STATE(_rs, \
DEFAULT_RATELIMIT_INTERVAL, \
DEFAULT_RATELIMIT_BURST); \
- DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, pr_fmt(fmt)); \
+ DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \
if (DYNAMIC_DEBUG_BRANCH(descriptor) && \
__ratelimit(&_rs)) \
__dynamic_pr_debug(&descriptor, pr_fmt(fmt), ##__VA_ARGS__); \
diff --git a/lib/test_dynamic_debug.c b/lib/test_dynamic_debug.c
index fe5b885398f3..2710c4ea39a0 100644
--- a/lib/test_dynamic_debug.c
+++ b/lib/test_dynamic_debug.c
@@ -23,7 +23,7 @@
* the usage clearer.
*/
#if defined(TEST_DYNAMIC_DEBUG_SUBMOD)
- #define pr_fmt(fmt) "test_dd_submod: " fmt
+ #define pr_fmt(fmt) "test_dd_submod: %s " fmt, __func__
#else
#define pr_fmt(fmt) "test_dd: " fmt
#endif
@@ -272,7 +272,7 @@ static int __init test_dynamic_debug_init(void)
static void __exit test_dynamic_debug_exit(void)
{
- pr_debug("exited\n");
+ pr_debug_ratelimited("exited\n");
}
module_init(test_dynamic_debug_init);
diff --git a/tools/testing/selftests/dynamic_debug/dyndbg_selftest.sh b/tools/testing/selftests/dynamic_debug/dyndbg_selftest.sh
index ef5f41ca7f7d..5eae762d6f78 100755
--- a/tools/testing/selftests/dynamic_debug/dyndbg_selftest.sh
+++ b/tools/testing/selftests/dynamic_debug/dyndbg_selftest.sh
@@ -588,40 +588,40 @@ function GOLDEN_RECORDS {
#K= 1d43471dca765597d88a1be25d776c92 FT_classmap_inheritance.2
#K= 0708a283f0f1959135c797e36119e4af FT_classmap_inheritance.3
#K= a0b9a8a9530706b85c4f8bf911607db0 FT_classmap_inheritance.4
-#K= f43e0aff8a4b38435b73d90ed8100d1b FT_classmap_inheritance.5
+#K= 62b6803edf43519186d6185bebf34352 FT_classmap_inheritance.5
#K= 53d1b6875b65c79cfd759e209ae50b11 FT_modprobe_w_param.1
#K= 53d1b6875b65c79cfd759e209ae50b11 FT_modprobe_w_param.2
-#K= 79d912e2aeb04dea70f9c7e701333f0a FT_modprobe_w_param.3
+#K= 117ebf415c886c14b22e473d9b49886b FT_modprobe_w_param.3
#K= 6a320774e2b535ceb89d6cdde6f5d0fb FT_modprobe_w_param.4
-#K= 7cd75277388a6e7cf9c849442388f4af FT_modprobe_w_param.5
+#K= 23bf93d8d91b2e033f91caf2e5d2df2c FT_modprobe_w_param.5
#K= 6a320774e2b535ceb89d6cdde6f5d0fb FT_modprobe_w_param.6
-#K= 9196c43693f5e6059f3512e4d87e7347 FT_modprobe_w_param.7
+#K= 7090bc68365ad55564c54b1ba7355c73 FT_modprobe_w_param.7
#K= 6a320774e2b535ceb89d6cdde6f5d0fb FT_modprobe_w_param.8
#K= f9cee4512e5604603e0262fba4bea223 FT_modprobe_w_param.9
#K= 6a320774e2b535ceb89d6cdde6f5d0fb FT_modprobe_w_param.10
-#K= 7c645692e3e3796d4d3b8604c49583f7 FT_modprobe_w_param.11
+#K= 076874eb43826e97586f034f4d2786e6 FT_modprobe_w_param.11
#K= 6a320774e2b535ceb89d6cdde6f5d0fb FT_modprobe_w_param.12
-#K= e995f70c0509334a33aec40ada9e6e6c FT_modprobe_w_param.13
+#K= 872dbd5d067953e34cd5a88db3a3b5e4 FT_modprobe_w_param.13
#K= 6a320774e2b535ceb89d6cdde6f5d0fb FT_modprobe_w_param.14
-#K= 72f97ca3e8f4c3e7f34fbe91de62e223 FT_modprobe_w_param.15
+#K= dce720419939a1baadaae27e98ceabea FT_modprobe_w_param.15
#K= 6a320774e2b535ceb89d6cdde6f5d0fb FT_modprobe_w_param.16
#K= 1aacb7c196a8354c46c60c73d78c6bf2 FT_modprobe_w_param.17
#K= 6a320774e2b535ceb89d6cdde6f5d0fb FT_modprobe_w_param.18
#K= e62014acf5ab6a76dfbfbcf67b2ca0e8 FT_modprobe_w_param.19
#K= e62014acf5ab6a76dfbfbcf67b2ca0e8 FT_modprobe_w_param.20
-#K= 58c009cb287fa5df3f8c1c72c832cb42 FT_modprobe_w_param.21
+#K= 4bfcf87a67b1a5a5a56212deac36c20a FT_modprobe_w_param.21
#K= 6a320774e2b535ceb89d6cdde6f5d0fb FT_modprobe_w_param.22
-#K= e7831be2aac4a82daba43966b9d31e19 FT_modprobe_w_param.23
+#K= f0d3016e22d88ee9f810b81235c6acdc FT_modprobe_w_param.23
#K= 6a320774e2b535ceb89d6cdde6f5d0fb FT_modprobe_w_param.24
-#K= 4df2fbc0cae329debb14bedb5e7d86c0 FT_modprobe_w_param.25
+#K= da3e0531675fc96503a7077ef8fa5eeb FT_modprobe_w_param.25
#K= 6a320774e2b535ceb89d6cdde6f5d0fb FT_modprobe_w_param.26
#K= 7fa4c84490c42c750986614c3539d56a FT_modprobe_w_param.27
#K= 6a320774e2b535ceb89d6cdde6f5d0fb FT_modprobe_w_param.28
-#K= fc098897aa3e1472a536e7ae8069c84f FT_modprobe_w_param.29
+#K= 923ca0e8a24d3e365b9dc89624062708 FT_modprobe_w_param.29
#K= 6a320774e2b535ceb89d6cdde6f5d0fb FT_modprobe_w_param.30
-#K= 38ea63fed62a0308241325e57020b28e FT_modprobe_w_param.31
+#K= 7eb76bdeb6e42f46e9c16b5932db79e1 FT_modprobe_w_param.31
#K= 6a320774e2b535ceb89d6cdde6f5d0fb FT_modprobe_w_param.32
-#K= 4b896adb5e7cfcc79f9ffa879d791f37 FT_modprobe_w_param.33
+#K= 5aaa5a8e367ec2871785f0c64853e243 FT_modprobe_w_param.33
#K= 6a320774e2b535ceb89d6cdde6f5d0fb FT_modprobe_w_param.34
#K= 7f961a7d3facd89bdd4b9d8e7b5541e9 FT_modprobe_w_param.35
#K= 6a320774e2b535ceb89d6cdde6f5d0fb FT_modprobe_w_param.36
--
2.55.0
next prev parent reply other threads:[~2026-09-16 15:33 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-16 15:32 [PATCH v10 00/38] dyndbg: Fix classmaps API for subsystems, query extensions, selftests Jim Cromie via B4 Relay
2026-09-16 15:32 ` [PATCH v10 01/38] selftests/dyndbg: Add kselftest script to verify dynamic-debug Jim Cromie via B4 Relay
2026-09-16 15:32 ` [PATCH v10 02/38] vmlinux.lds.h: refactor BOUNDED_SECTION_* macros into bounded_sections.lds.h Jim Cromie via B4 Relay
2026-09-16 15:32 ` [PATCH v10 03/38] vmlinux.lds.h: drop unused HEADERED_SECTION* macros Jim Cromie via B4 Relay
2026-09-16 15:32 ` [PATCH v10 04/38] vmlinux.lds.h: Fix ALIGN(8) omission causing NULL ptr on i386 Jim Cromie via B4 Relay
2026-09-16 15:32 ` [PATCH v10 05/38] vmlinux.lds.h: remove redundant ALIGN(8) directives Jim Cromie via B4 Relay
2026-09-16 15:32 ` [PATCH v10 06/38] dyndbg.lds.S: fix lost dyndbg sections in modules Jim Cromie via B4 Relay
2026-09-16 15:32 ` [PATCH v10 07/38] dyndbg: factor ddebug_match_desc out from ddebug_change Jim Cromie via B4 Relay
2026-09-16 15:33 ` [PATCH v10 08/38] dyndbg: add stub macro for DECLARE_DYNDBG_CLASSMAP Jim Cromie via B4 Relay
2026-09-16 15:33 ` [PATCH v10 09/38] dyndbg: reword "class unknown," to "class:_UNKNOWN_" Jim Cromie via B4 Relay
2026-09-16 15:33 ` [PATCH v10 10/38] dyndbg-API: remove DD_CLASS_TYPE_(DISJOINT|LEVEL)_NAMES and code Jim Cromie via B4 Relay
2026-09-16 15:33 ` [PATCH v10 11/38] dyndbg: drop NUM_TYPE_ARGS Jim Cromie via B4 Relay
2026-09-16 15:33 ` [PATCH v10 12/38] dyndbg: bump num-tokens in a query-cmd from 9 to 15 Jim Cromie via B4 Relay
2026-09-16 15:33 ` [PATCH v10 13/38] dyndbg: reduce verbose/debug clutter Jim Cromie via B4 Relay
2026-09-16 15:33 ` [PATCH v10 14/38] dyndbg: Bind callsites and classmaps to DDEBUG_MODNAME Jim Cromie via B4 Relay
2026-09-16 15:33 ` [PATCH v10 15/38] dyndbg: refactor param_set_dyndbg_classes and below Jim Cromie via B4 Relay
2026-09-16 15:33 ` [PATCH v10 16/38] dyndbg: tighten fn-sig of ddebug_apply_class_bitmap Jim Cromie via B4 Relay
2026-09-16 15:33 ` [PATCH v10 17/38] dyndbg: replace classmap list with an array-slice Jim Cromie via B4 Relay
2026-09-16 15:33 ` [PATCH v10 18/38] dyndbg: macrofy a 2-index for-loop pattern Jim Cromie via B4 Relay
2026-09-16 15:33 ` [PATCH v10 19/38] dyndbg: reduce class param storage to u32 Jim Cromie via B4 Relay
2026-09-16 15:33 ` [PATCH v10 20/38] dyndbg,module: make proper substructs in _ddebug_info Jim Cromie via B4 Relay
2026-09-16 15:33 ` [PATCH v10 21/38] dyndbg: move mod_name down from struct ddebug_table to _ddebug_info Jim Cromie via B4 Relay
2026-09-16 15:33 ` [PATCH v10 22/38] dyndbg: hoist classmap-filter-by-modname up to ddebug_add_module Jim Cromie via B4 Relay
2026-09-16 15:33 ` [PATCH v10 23/38] dyndbg-API: replace DECLARE_DYNDBG_CLASSMAP Jim Cromie via B4 Relay
2026-09-16 15:33 ` [PATCH v10 24/38] selftests/dyndbg: Enable FT_classmap_inheritance Jim Cromie via B4 Relay
2026-09-16 15:33 ` [PATCH v10 25/38] dyndbg: detect class_id reservation conflicts Jim Cromie via B4 Relay
2026-09-16 15:33 ` [PATCH v10 26/38] dyndbg: check DYNAMIC_DEBUG_CLASSMAP_{DEFINE,USE_} args at compile-time Jim Cromie via B4 Relay
2026-09-16 15:33 ` [PATCH v10 27/38] dyndbg-test: add do_bulk testpoint, rename do_prints to do_classes Jim Cromie via B4 Relay
2026-09-16 15:33 ` [PATCH v10 28/38] dyndbg-API: promote DYNAMIC_DEBUG_CLASSMAP_PARAM to API Jim Cromie via B4 Relay
2026-09-16 15:33 ` [PATCH v10 29/38] dyndbg: control-parser: treat comma as a token separator Jim Cromie via B4 Relay
2026-09-16 15:33 ` [PATCH v10 30/38] selftests: enable comma-terminator tests Jim Cromie via B4 Relay
2026-09-16 15:33 ` [PATCH v10 31/38] dyndbg: split multi-query strings with @ Jim Cromie via B4 Relay
2026-09-16 15:33 ` [PATCH v10 32/38] dyndbg: resolve "protection" of class'd pr_debug Jim Cromie via B4 Relay
2026-09-16 15:33 ` [PATCH v10 33/38] dyndbg: harden classmap and descriptor validation Jim Cromie via B4 Relay
2026-09-16 15:33 ` [PATCH v10 34/38] docs/dyndbg: add classmap info to howto Jim Cromie via B4 Relay
2026-09-16 15:33 ` Jim Cromie via B4 Relay [this message]
2026-09-16 15:33 ` [PATCH v10 36/38] dyndbg: add epilogue to dynamic_debug/control file Jim Cromie via B4 Relay
2026-09-16 15:33 ` [PATCH v10 37/38] dyndbg: add +c flag to count advantage of classmaps for DRM Jim Cromie via B4 Relay
2026-09-16 15:33 ` [PATCH v10 38/38] dyndbg: add DEBUG-biased fallback stubs for _dynamic_func_call_cls Jim Cromie via B4 Relay
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