linux-kernel - [PATCH v3 4/5] pstore/blk: Fix kerndoc and redundancy on blkdev param

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Message-Id: <20210616164043.1221861-5-keescook@chromium.org>
Date:   Wed, 16 Jun 2021 09:40:42 -0700
From:   Kees Cook <keescook@...omium.org>
To:     linux-kernel@...r.kernel.org
Cc:     Kees Cook <keescook@...omium.org>, Christoph Hellwig <hch@....de>,
        Al Viro <viro@...iv.linux.org.uk>, gmpy.liaowx@...il.com,
        Anton Vorontsov <anton@...msg.org>,
        Colin Cross <ccross@...roid.com>,
        Tony Luck <tony.luck@...el.com>,
        Jonathan Corbet <corbet@....net>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        linux-doc@...r.kernel.org, linux-mtd@...ts.infradead.org,
        linux-block@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: [PATCH v3 4/5] pstore/blk: Fix kerndoc and redundancy on blkdev param

Remove redundant details of blkdev and fix up resulting kerndoc.

Reviewed-by: Christoph Hellwig <hch@....de>
Signed-off-by: Kees Cook <keescook@...omium.org>
---
 Documentation/admin-guide/pstore-blk.rst | 11 +++++++----
 fs/pstore/blk.c                          | 24 +-----------------------
 2 files changed, 8 insertions(+), 27 deletions(-)

diff --git a/Documentation/admin-guide/pstore-blk.rst b/Documentation/admin-guide/pstore-blk.rst
index 79f6d23e8cda..2d22ead9520e 100644
--- a/Documentation/admin-guide/pstore-blk.rst
+++ b/Documentation/admin-guide/pstore-blk.rst
@@ -45,15 +45,18 @@ blkdev
 The block device to use. Most of the time, it is a partition of block device.
 It's required for pstore/blk. It is also used for MTD device.
 
-It accepts the following variants for block device:
+When pstore/blk is built as a module, "blkdev" accepts the following variants:
 
-1. <hex_major><hex_minor> device number in hexadecimal represents itself; no
-   leading 0x, for example b302.
-#. /dev/<disk_name> represents the device number of disk
+1. /dev/<disk_name> represents the device number of disk
 #. /dev/<disk_name><decimal> represents the device number of partition - device
    number of disk plus the partition number
 #. /dev/<disk_name>p<decimal> - same as the above; this form is used when disk
    name of partitioned disk ends with a digit.
+
+When pstore/blk is built into the kernel, "blkdev" accepts the following variants:
+
+#. <hex_major><hex_minor> device number in hexadecimal representation,
+   with no leading 0x, for example b302.
 #. PARTUUID=00112233-4455-6677-8899-AABBCCDDEEFF represents the unique id of
    a partition if the partition table provides it. The UUID may be either an
    EFI/GPT UUID, or refer to an MSDOS partition using the format SSSSSSSS-PP,
diff --git a/fs/pstore/blk.c b/fs/pstore/blk.c
index dc5ff763d414..c373e0d73e6c 100644
--- a/fs/pstore/blk.c
+++ b/fs/pstore/blk.c
@@ -58,29 +58,7 @@ MODULE_PARM_DESC(best_effort, "use best effort to write (i.e. do not require sto
 
 /*
  * blkdev - the block device to use for pstore storage
- *
- * Usually, this will be a partition of a block device.
- *
- * blkdev accepts the following variants, when built as a module:
- * 1) /dev/<disk_name> represents the device number of disk
- * 2) /dev/<disk_name><decimal> represents the device number
- *    of partition - device number of disk plus the partition number
- * 3) /dev/<disk_name>p<decimal> - same as the above, that form is
- *    used when disk name of partitioned disk ends on a digit.
- *
- * blkdev accepts the following variants when built into the kernel:
- * 1) <hex_major><hex_minor> device number in hexadecimal representation,
- *    with no leading 0x, for example b302.
- * 2) PARTUUID=00112233-4455-6677-8899-AABBCCDDEEFF representing the
- *    unique id of a partition if the partition table provides it.
- *    The UUID may be either an EFI/GPT UUID, or refer to an MSDOS
- *    partition using the format SSSSSSSS-PP, where SSSSSSSS is a zero-
- *    filled hex representation of the 32-bit "NT disk signature", and PP
- *    is a zero-filled hex representation of the 1-based partition number.
- * 3) PARTUUID=<UUID>/PARTNROFF=<int> to select a partition in relation to
- *    a partition with a known unique id.
- * 4) <major>:<minor> major and minor number of the device separated by
- *    a colon.
+ * See Documentation/admin-guide/pstore-blk.rst for details.
  */
 static char blkdev[80] = CONFIG_PSTORE_BLK_BLKDEV;
 module_param_string(blkdev, blkdev, 80, 0400);
-- 
2.25.1