[PATCH] include: linux/printk.h: allow forcing log level per file

[PATCH] include: linux/printk.h: allow forcing log level per file

[Ahmad Fatoum]

We support defining DEBUG or VERBOSE_DEBUG to increase the log level per
file, but we lack a way to decrease the log level.

The latter could be useful when shotgun debugging with all debug logging
enabled, as otherwise some debug output may drown out everything else.

To support this, allow LOGLEVEL to be defined per file. We don't expect
that any files committed to tree would do this, but it may turn out to
be useful during debugging.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
 include/linux/printk.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/printk.h b/include/linux/printk.h
index 0d7180f0ebbc..b9b3ddeb4d39 100644
--- a/include/linux/printk.h
+++ b/include/linux/printk.h
@@ -22,7 +22,7 @@
 #define LOGLEVEL	MSG_VDEBUG
 #elif defined DEBUG
 #define LOGLEVEL	MSG_DEBUG
-#else
+#elif !defined(LOGLEVEL)
 #define LOGLEVEL	CONFIG_COMPILE_LOGLEVEL
 #endif
 
-- 
2.47.3

Re: [PATCH] include: linux/printk.h: allow forcing log level per file

[Sascha Hauer]

On Thu, 05 Feb 2026 18:11:43 +0100, Ahmad Fatoum wrote:
> We support defining DEBUG or VERBOSE_DEBUG to increase the log level per
> file, but we lack a way to decrease the log level.
> 
> The latter could be useful when shotgun debugging with all debug logging
> enabled, as otherwise some debug output may drown out everything else.
> 
> To support this, allow LOGLEVEL to be defined per file. We don't expect
> that any files committed to tree would do this, but it may turn out to
> be useful during debugging.
> 
> [...]

Applied, thanks!

[1/1] include: linux/printk.h: allow forcing log level per file
      https://git.pengutronix.de/cgit/barebox/commit/?id=c4657de3af99 (link may not be stable)

Best regards,
-- 
Sascha Hauer <s.hauer@pengutronix.de>