linux-hardening - [RFC][PATCH v2 12/29] timers: Annotate static information into Kmemdump

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Message-ID: <20250724135512.518487-13-eugen.hristev@linaro.org>
Date: Thu, 24 Jul 2025 16:54:55 +0300
From: Eugen Hristev <eugen.hristev@...aro.org>
To: linux-kernel@...r.kernel.org,
	linux-arm-msm@...r.kernel.org,
	linux-arch@...r.kernel.org,
	linux-mm@...ck.org,
	tglx@...utronix.de,
	andersson@...nel.org,
	pmladek@...e.com
Cc: linux-arm-kernel@...ts.infradead.org,
	linux-hardening@...r.kernel.org,
	eugen.hristev@...aro.org,
	corbet@....net,
	mojha@....qualcomm.com,
	rostedt@...dmis.org,
	jonechou@...gle.com,
	tudor.ambarus@...aro.org
Subject: [RFC][PATCH v2 12/29] timers: Annotate static information into Kmemdump

Annotate vital static information into kmemdump:
 - jiffies_64

Information on these variables is stored into dedicated kmemdump section.

Signed-off-by: Eugen Hristev <eugen.hristev@...aro.org>
---
 kernel/time/timer.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kernel/time/timer.c b/kernel/time/timer.c
index 553fa469d7cc..a5698e3ace2d 100644
--- a/kernel/time/timer.c
+++ b/kernel/time/timer.c
@@ -44,6 +44,7 @@
 #include <linux/compat.h>
 #include <linux/random.h>
 #include <linux/sysctl.h>
+#include <linux/kmemdump.h>
 
 #include <linux/uaccess.h>
 #include <asm/unistd.h>
@@ -60,7 +61,7 @@
 __visible u64 jiffies_64 __cacheline_aligned_in_smp = INITIAL_JIFFIES;
 
 EXPORT_SYMBOL(jiffies_64);
-
+KMEMDUMP_VAR_CORE(jiffies_64, sizeof(jiffies_64));
 /*
  * The timer wheel has LVL_DEPTH array levels. Each level provides an array of
  * LVL_SIZE buckets. Each level is driven by its own clock and therefore each
-- 
2.43.0