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Date:   Sun, 25 Jun 2017 13:11:54 +0200
From:   Rafał Miłecki <>
To:     David Woodhouse <>,
        Brian Norris <>,
        Boris Brezillon <>,
        Marek Vasut <>,
        Richard Weinberger <>
Cc:     Cyrille Pitchen <>,,,
        Rafał Miłecki <>
Subject: [PATCH] Documentation: ABI: mtd: describe "offset" more precisely

From: Rafał Miłecki <>

So far Linux supported only two levels of MTD devices so we didn't need
a very precise description for this sysfs file. With commit
97519dc52b44a ("mtd: partitions: add support for subpartitions") there
is support for a tree structure so we should have more precise
description. Using "parent" and "flash device" makes it more accurate.

Signed-off-by: Rafał Miłecki <>
 Documentation/ABI/testing/sysfs-class-mtd | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/Documentation/ABI/testing/sysfs-class-mtd b/Documentation/ABI/testing/sysfs-class-mtd
index 3b5c3bca9186..f34e592301d1 100644
--- a/Documentation/ABI/testing/sysfs-class-mtd
+++ b/Documentation/ABI/testing/sysfs-class-mtd
@@ -229,6 +229,6 @@ KernelVersion:	4.1
 		For a partition, the offset of that partition from the start
-		of the master device in bytes. This attribute is absent on
-		main devices, so it can be used to distinguish between
-		partitions and devices that aren't partitions.
+		of the parent (another partition or a flash device) in bytes.
+		This attribute is absent on flash devices, so it can be used
+		to distinguish them from partitions.

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