From: Ezequiel Garcia <ezequiel@collabora.com>
To: linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org,
Richard Weinberger <richard@nod.at>
Cc: Miquel Raynal <miquel.raynal@bootlin.com>,
Vignesh Raghavendra <vigneshr@ti.com>,
Ezequiel Garcia <ezequiel@collabora.com>
Subject: [PATCH 1/3] mtdblock: Update old JFFS2 mention in Kconfig
Date: Sun, 1 Aug 2021 20:45:03 -0300 [thread overview]
Message-ID: <20210801234509.18774-2-ezequiel@collabora.com> (raw)
In-Reply-To: <20210801234509.18774-1-ezequiel@collabora.com>
JFFS2 can be mounted without 'mtdblock' since
a really, really long time. Some git-log
archaeology shows that in 2006 it was possible
to use 'root=' to mount a JFFS2 rootfs:
commit e9482b4374e2596e6f3f1ab30c4ea469f4ac6311
Author: Joern Engel <joern@wh.fh-wedel.de>
Date: Tue May 30 14:25:46 2006 +0200
[MTD] Allow alternate JFFS2 mount variant for root filesystem.
With this patch, "root=mtd3" and "root=mtd:foo" work for a JFFS2 rootfs.
However, there are still plenty of tutorials that mention
mtdblock, so users are still taking this route. Update the Kconfig
to reflect this is no longer needed.
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
---
drivers/mtd/Kconfig | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/drivers/mtd/Kconfig b/drivers/mtd/Kconfig
index 79a8ff542883..32bed6c63863 100644
--- a/drivers/mtd/Kconfig
+++ b/drivers/mtd/Kconfig
@@ -127,10 +127,9 @@ config MTD_BLOCK
on RAM chips in this manner. This block device is a user of MTD
devices performing that function.
- At the moment, it is also required for the Journalling Flash File
- System(s) to obtain a handle on the MTD device when it's mounted
- (although JFFS and JFFS2 don't actually use any of the functionality
- of the mtdblock device).
+ Note that mounting a JFFS2 filesystem doesn't require using mtdblock.
+ It's possible to mount a rootfs using the MTD device on the "root="
+ bootargs as "root=mtd2" or "root=mtd:name_of_device".
Later, it may be extended to perform read/erase/modify/write cycles
on flash chips to emulate a smaller block size. Needless to say,
--
2.32.0
next prev parent reply other threads:[~2021-08-01 23:45 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-01 23:45 [PATCH 0/3] mtdblock: Advertise about UBI and UBI block Ezequiel Garcia
2021-08-01 23:45 ` Ezequiel Garcia [this message]
2021-08-01 23:45 ` [PATCH 2/3] mtdblock: Add comment about UBI block devices Ezequiel Garcia
2021-08-01 23:45 ` [PATCH 3/3] mtdblock: Warn if the added for a NAND device Ezequiel Garcia
2021-08-01 23:45 ` [PATCH 0/3] mtdblock: Advertise about UBI and UBI block Ezequiel Garcia
2021-08-01 23:45 ` [PATCH 1/3] mtdblock: Update old JFFS2 mention in Kconfig Ezequiel Garcia
2021-08-06 20:05 ` Miquel Raynal
2021-08-01 23:45 ` [PATCH 2/3] mtdblock: Add comment about UBI block devices Ezequiel Garcia
2021-08-06 20:05 ` Miquel Raynal
2021-08-01 23:45 ` [PATCH 3/3] mtdblock: Warn if the added for a NAND device Ezequiel Garcia
2021-08-06 20:05 ` Miquel Raynal
2021-08-17 16:27 ` Ezequiel Garcia
2021-08-17 16:49 ` Miquel Raynal
2021-10-26 15:03 ` [PATCH 0/3] mtdblock: Advertise about UBI and UBI block Trevor Woerner
2021-10-26 19:01 ` Richard Weinberger
2021-10-28 13:31 ` Trevor Woerner
2021-11-09 10:55 ` Miquel Raynal
2021-11-09 11:45 ` Daniel Golle
2021-11-12 13:54 ` Ezequiel Garcia
2022-01-20 9:39 ` Miquel Raynal
2022-01-20 10:26 ` Ezequiel Garcia
2022-01-20 11:22 ` Miquel Raynal
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