linux-kernel - [RFC][PATCH 09/10] devcoredump: add devcd_{un}register_core

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Message-ID: <20250217101706.2104498-10-eugen.hristev@linaro.org>
Date: Mon, 17 Feb 2025 12:17:05 +0200
From: Eugen Hristev <eugen.hristev@...aro.org>
To: linux-arm-msm@...r.kernel.org,
	linux-hardening@...r.kernel.org,
	kees@...nel.org
Cc: linux-kernel@...r.kernel.org,
	johannes@...solutions.net,
	gregkh@...uxfoundation.org,
	rafael@...nel.org,
	dakr@...nel.org,
	andersson@...nel.org,
	konradybcio@...nel.org,
	tony.luck@...el.com,
	gpiccoli@...lia.com,
	pmladek@...e.com,
	rostedt@...dmis.org,
	john.ogness@...utronix.de,
	senozhatsky@...omium.org,
	quic_mojha@...cinc.com,
	linux-arm-kernel@...ts.infradead.org,
	kernel@...cinc.com,
	Eugen Hristev <eugen.hristev@...aro.org>
Subject: [RFC][PATCH 09/10] devcoredump: add devcd_{un}register_core_area API

Add API for registering device core area for saving into pstore.

Signed-off-by: Eugen Hristev <eugen.hristev@...aro.org>
---
 drivers/base/devcoredump.c  | 13 +++++++++++++
 include/linux/devcoredump.h |  3 +++
 2 files changed, 16 insertions(+)

diff --git a/drivers/base/devcoredump.c b/drivers/base/devcoredump.c
index 2a0e0b2fdb98..2cf17b148c5a 100644
--- a/drivers/base/devcoredump.c
+++ b/drivers/base/devcoredump.c
@@ -9,6 +9,7 @@
 #include <linux/device.h>
 #include <linux/devcoredump.h>
 #include <linux/list.h>
+#include <linux/pstore.h>
 #include <linux/slab.h>
 #include <linux/fs.h>
 #include <linux/workqueue.h>
@@ -76,6 +77,18 @@ static struct devcd_entry *dev_to_devcd(struct device *dev)
 	return container_of(dev, struct devcd_entry, devcd_dev);
 }
 
+int devcd_register_core_area(struct device *dev, void *area, size_t size)
+{
+	return pstore_register_core_area(dev->driver->name, area, size);
+}
+EXPORT_SYMBOL_GPL(devcd_register_core_area);
+
+int devcd_unregister_core_area(struct device *dev, void *area, size_t size)
+{
+	return pstore_unregister_core_area(dev->driver->name, area, size);
+}
+EXPORT_SYMBOL_GPL(devcd_unregister_core_area);
+
 static void devcd_dev_release(struct device *dev)
 {
 	struct devcd_entry *devcd = dev_to_devcd(dev);
diff --git a/include/linux/devcoredump.h b/include/linux/devcoredump.h
index 377892604ff4..9d80e4ac91ff 100644
--- a/include/linux/devcoredump.h
+++ b/include/linux/devcoredump.h
@@ -69,6 +69,9 @@ void dev_coredumpsg(struct device *dev, struct scatterlist *table,
 		    size_t datalen, gfp_t gfp);
 
 void dev_coredump_put(struct device *dev);
+
+int devcd_register_core_area(struct device *, void *, size_t);
+int devcd_unregister_core_area(struct device *, void *, size_t);
 #else
 static inline void dev_coredumpv(struct device *dev, void *data,
 				 size_t datalen, gfp_t gfp)
-- 
2.43.0