linux-kernel - [PATCH v15 2/3] mtd: Move struct mtd

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Message-Id: <20260129-mtd-virt-concat-v15-2-c56a232efbd2@bootlin.com>
Date: Thu, 29 Jan 2026 13:09:28 +0100
From: Luca Ceresoli <luca.ceresoli@...tlin.com>
To: Miquel Raynal <miquel.raynal@...tlin.com>, 
 Richard Weinberger <richard@....at>, Vignesh Raghavendra <vigneshr@...com>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Rafał Miłecki <rafal@...ecki.pl>
Cc: Amit Kumar Mahapatra <amit.kumar-mahapatra@....com>, 
 Michal Simek <monstr@...str.eu>, 
 Bernhard Frauendienst <kernel@...pam.obeliks.de>, 
 Thomas Petazzoni <thomas.petazzoni@...tlin.com>, 
 linux-mtd@...ts.infradead.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Luca Ceresoli <luca.ceresoli@...tlin.com>
Subject: [PATCH v15 2/3] mtd: Move struct mtd_concat definition to header
 file

From: Amit Kumar Mahapatra <amit.kumar-mahapatra@....com>

To enable a more generic approach for concatenating MTD devices,
struct mtd_concat should be accessible beyond the mtdconcat driver.
Therefore, the definition is being moved to a header file.

Signed-off-by: Amit Kumar Mahapatra <amit.kumar-mahapatra@....com>
---
 drivers/mtd/mtdconcat.c    | 12 ------------
 include/linux/mtd/concat.h | 12 ++++++++++++
 2 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/drivers/mtd/mtdconcat.c b/drivers/mtd/mtdconcat.c
index f56f44aa8625..6f2aaceac669 100644
--- a/drivers/mtd/mtdconcat.c
+++ b/drivers/mtd/mtdconcat.c
@@ -20,18 +20,6 @@
 
 #include <asm/div64.h>
 
-/*
- * Our storage structure:
- * Subdev points to an array of pointers to struct mtd_info objects
- * which is allocated along with this structure
- *
- */
-struct mtd_concat {
-	struct mtd_info mtd;
-	int num_subdev;
-	struct mtd_info **subdev;
-};
-
 /*
  * how to calculate the size required for the above structure,
  * including the pointer array subdev points to:
diff --git a/include/linux/mtd/concat.h b/include/linux/mtd/concat.h
index d6f653e07426..b42d9af87c4e 100644
--- a/include/linux/mtd/concat.h
+++ b/include/linux/mtd/concat.h
@@ -9,6 +9,18 @@
 #define MTD_CONCAT_H
 
 
+/*
+ * Our storage structure:
+ * Subdev points to an array of pointers to struct mtd_info objects
+ * which is allocated along with this structure
+ *
+ */
+struct mtd_concat {
+	struct mtd_info mtd;
+	int num_subdev;
+	struct mtd_info **subdev;
+};
+
 struct mtd_info *mtd_concat_create(
     struct mtd_info *subdev[],  /* subdevices to concatenate */
     int num_devs,               /* number of subdevices      */

-- 
2.52.0