linux-kernel - [PATCH 1/4] lib/hexdump.c: Allow 64 bytes per line

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Date:   Wed, 10 Apr 2019 13:17:17 +1000
From:   "Alastair D'Silva" <alastair@....ibm.com>
To:     alastair@...ilva.org
Cc:     Jani Nikula <jani.nikula@...ux.intel.com>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Karsten Keil <isdn@...ux-pingi.de>,
        Jassi Brar <jassisinghbrar@...il.com>,
        Tom Lendacky <thomas.lendacky@....com>,
        "David S. Miller" <davem@...emloft.net>,
        Jose Abreu <Jose.Abreu@...opsys.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        Stanislaw Gruszka <sgruszka@...hat.com>,
        Benson Leung <bleung@...omium.org>,
        Enric Balletbo i Serra <enric.balletbo@...labora.com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Petr Mladek <pmladek@...e.com>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        ath10k@...ts.infradead.org, linux-wireless@...r.kernel.org,
        linux-scsi@...r.kernel.org, linux-fbdev@...r.kernel.org,
        devel@...verdev.osuosl.org, linux-fsdevel@...r.kernel.org
Subject: [PATCH 1/4] lib/hexdump.c: Allow 64 bytes per line

From: Alastair D'Silva <alastair@...ilva.org>

With modern high resolution screens, we can display more data, which makes
life a bit easier when debugging.

Allow 64 bytes to be dumped per line.

Signed-off-by: Alastair D'Silva <alastair@...ilva.org>
---
 lib/hexdump.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/lib/hexdump.c b/lib/hexdump.c
index 81b70ed37209..b8a164814744 100644
--- a/lib/hexdump.c
+++ b/lib/hexdump.c
@@ -80,14 +80,14 @@ EXPORT_SYMBOL(bin2hex);
  * hex_dump_to_buffer - convert a blob of data to "hex ASCII" in memory
  * @buf: data blob to dump
  * @len: number of bytes in the @buf
- * @rowsize: number of bytes to print per line; must be 16 or 32
+ * @rowsize: number of bytes to print per line; must be 16, 32 or 64
  * @groupsize: number of bytes to print at a time (1, 2, 4, 8; default = 1)
  * @linebuf: where to put the converted data
  * @linebuflen: total size of @linebuf, including space for terminating NUL
  * @ascii: include ASCII after the hex output
  *
  * hex_dump_to_buffer() works on one "line" of output at a time, i.e.,
- * 16 or 32 bytes of input data converted to hex + ASCII output.
+ * 16, 32 or 64 bytes of input data converted to hex + ASCII output.
  *
  * Given a buffer of u8 data, hex_dump_to_buffer() converts the input data
  * to a hex + ASCII dump at the supplied memory location.
@@ -116,7 +116,7 @@ int hex_dump_to_buffer(const void *buf, size_t len, int rowsize, int groupsize,
 	int ascii_column;
 	int ret;
 
-	if (rowsize != 16 && rowsize != 32)
+	if (rowsize != 16 && rowsize != 32 && rowsize != 64)
 		rowsize = 16;
 
 	if (len > rowsize)		/* limit to one line at a time */
@@ -216,7 +216,7 @@ EXPORT_SYMBOL(hex_dump_to_buffer);
  *  caller supplies trailing spaces for alignment if desired
  * @prefix_type: controls whether prefix of an offset, address, or none
  *  is printed (%DUMP_PREFIX_OFFSET, %DUMP_PREFIX_ADDRESS, %DUMP_PREFIX_NONE)
- * @rowsize: number of bytes to print per line; must be 16 or 32
+ * @rowsize: number of bytes to print per line; must be 16, 32 or 64
  * @groupsize: number of bytes to print at a time (1, 2, 4, 8; default = 1)
  * @buf: data blob to dump
  * @len: number of bytes in the @buf
@@ -227,7 +227,7 @@ EXPORT_SYMBOL(hex_dump_to_buffer);
  * leading prefix.
  *
  * print_hex_dump() works on one "line" of output at a time, i.e.,
- * 16 or 32 bytes of input data converted to hex + ASCII output.
+ * 16, 32 or 64 bytes of input data converted to hex + ASCII output.
  * print_hex_dump() iterates over the entire input @buf, breaking it into
  * "line size" chunks to format and print.
  *
@@ -246,9 +246,9 @@ void print_hex_dump(const char *level, const char *prefix_str, int prefix_type,
 {
 	const u8 *ptr = buf;
 	int i, linelen, remaining = len;
-	unsigned char linebuf[32 * 3 + 2 + 32 + 1];
+	unsigned char linebuf[64 * 3 + 2 + 64 + 1];
 
-	if (rowsize != 16 && rowsize != 32)
+	if (rowsize != 16 && rowsize != 32 && rowsize != 64)
 		rowsize = 16;
 
 	for (i = 0; i < len; i += rowsize) {
-- 
2.20.1