linux-kernel - [RFC][PATCH 11/14] panic: add panic_kmemdump

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Message-ID: <20250422113156.575971-12-eugen.hristev@linaro.org>
Date: Tue, 22 Apr 2025 14:31:53 +0300
From: Eugen Hristev <eugen.hristev@...aro.org>
To: linux-kernel@...r.kernel.org,
	linux-arm-msm@...r.kernel.org,
	andersson@...nel.org
Cc: linux-doc@...r.kernel.org,
	corbet@....net,
	tglx@...utronix.de,
	mingo@...hat.com,
	rostedt@...dmis.org,
	john.ogness@...utronix.de,
	senozhatsky@...omium.org,
	pmladek@...e.com,
	peterz@...radead.org,
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	linux-arm-kernel@...ts.infradead.org,
	vincent.guittot@...aro.org,
	konradybcio@...nel.org,
	dietmar.eggemann@....com,
	juri.lelli@...hat.com,
	eugen.hristev@...aro.org
Subject: [RFC][PATCH 11/14] panic: add panic_kmemdump_register

Add function to register panic info into kmemdump

Signed-off-by: Eugen Hristev <eugen.hristev@...aro.org>
---
 include/linux/panic.h | 1 +
 kernel/panic.c        | 8 ++++++++
 2 files changed, 9 insertions(+)

diff --git a/include/linux/panic.h b/include/linux/panic.h
index 54d90b6c5f47..42a24bae218c 100644
--- a/include/linux/panic.h
+++ b/include/linux/panic.h
@@ -96,5 +96,6 @@ extern const char *print_tainted_verbose(void);
 extern void add_taint(unsigned flag, enum lockdep_ok);
 extern int test_taint(unsigned flag);
 extern unsigned long get_taint(void);
+extern void panic_kmemdump_register(void);
 
 #endif	/* _LINUX_PANIC_H */
diff --git a/kernel/panic.c b/kernel/panic.c
index d8635d5cecb2..a26c9581e70a 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -38,6 +38,7 @@
 #include <linux/seq_buf.h>
 #include <trace/events/error_report.h>
 #include <asm/sections.h>
+#include <linux/kmemdump.h>
 
 #define PANIC_TIMER_STEP 100
 #define PANIC_BLINK_SPD 18
@@ -589,6 +590,13 @@ unsigned long get_taint(void)
 	return tainted_mask;
 }
 
+void panic_kmemdump_register(void)
+{
+	kmemdump_register("taint", (void *)&tainted_mask, sizeof(tainted_mask));
+	kmemdump_register("taintflags", (void *)&taint_flags, sizeof(taint_flags));
+}
+EXPORT_SYMBOL_GPL(panic_kmemdump_register);
+
 /**
  * add_taint: add a taint flag if not already set.
  * @flag: one of the TAINT_* constants.
-- 
2.43.0