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Date: Tue, 08 Dec 2015 16:03:59 -0800
From: Joe Perches <joe@...ches.com>
To: Rob Herring <robh+dt@...nel.org>,
Andrew Morton <akpm@...ux-foundation.org>
Cc: Masahiro Yamada <yamada.masahiro@...ionext.com>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
Frank Rowand <frowand.list@...il.com>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Grant Likely <grant.likely@...aro.org>
Subject: Re: [PATCH v2] of/address: replace printk() with pr_debug() /
pr_err()
On Tue, 2015-12-08 at 15:28 -0600, Rob Herring wrote:
> On Tue, Dec 8, 2015 at 11:03 AM, Joe Perches <joe@...ches.com> wrote:
> > On Tue, 2015-12-08 at 08:16 -0800, Joe Perches wrote:
> > > On Wed, 2015-12-09 at 01:07 +0900, Masahiro Yamada wrote:
> > > > Trivial changes suggested by checkpatch.pl.
> > > []
> > > > diff --git a/drivers/of/address.c b/drivers/of/address.c
> > > []
> > > > @@ -23,7 +23,7 @@ static int __of_address_to_resource(struct device_node *dev,
> > > > #ifdef DEBUG
> > > > static void of_dump_addr(const char *s, const __be32 *addr, int na)
> > > > {
> > > > - printk(KERN_DEBUG "%s", s);
> > > > + pr_debug("%s", s);
> > > > while (na--)
> > > > printk(" %08x", be32_to_cpu(*(addr++)));
> > > > printk("\n");
[]
> > static void of_dumpaddr(const char *s, const __be32 *addr, int na)
> > {
> > print_hex_dump_debug(s, DUMP_PREFIX_NONE, 16, 1,
> > addr, na * sizeof(__be32), false);
> > }
>
> Except that it doesn't do the endian swapping. Looking closer at this,
> we should just drop this hunk. So I will take v1.
Maybe endian conversions should be added to hex_dump_debug like:
(probably doesn't apply. Evolution 3.18 is horrible)
---
include/linux/printk.h | 7 +++++++
lib/hexdump.c | 56 +++++++++++++++++++++++++++++++++++---------------
2 files changed, 47 insertions(+), 16 deletions(-)
diff --git a/include/linux/printk.h b/include/linux/printk.h
index 9729565..4be190c 100644
--- a/include/linux/printk.h
+++ b/include/linux/printk.h
@@ -424,6 +424,13 @@ enum {
DUMP_PREFIX_ADDRESS,
DUMP_PREFIX_OFFSET
};
+
+enum {
+ DUMP_TYPE_CPU = 0,
+ DUMP_TYPE_LE = BIT(30),
+ DUMP_TYPE_BE = BIT(31)
+};
+
extern int hex_dump_to_buffer(const void *buf, size_t len, int rowsize,
int groupsize, char *linebuf, size_t linebuflen,
bool ascii);
diff --git a/lib/hexdump.c b/lib/hexdump.c
index 992457b..49113aa 100644
--- a/lib/hexdump.c
+++ b/lib/hexdump.c
@@ -81,6 +81,7 @@ EXPORT_SYMBOL(bin2hex);
* @len: number of bytes in the @buf
* @rowsize: number of bytes to print per line; must be 16 or 32
* @groupsize: number of bytes to print at a time (1, 2, 4, 8; default = 1)
+ * OR'd with DUMP_TYPE_BE or DUMP_TYPE_LE for endian conversions
* @linebuf: where to put the converted data
* @linebuflen: total size of @linebuf, including space for terminating NUL
* @ascii: include ASCII after the hex output
@@ -114,19 +115,20 @@ int hex_dump_to_buffer(const void *buf, size_t len, int rowsize, int groupsize,
int j, lx = 0;
int ascii_column;
int ret;
+ int actual_groupsize = groupsize & ~(DUMP_TYPE_LE | DUMP_TYPE_BE);
if (rowsize != 16 && rowsize != 32)
rowsize = 16;
if (len > rowsize) /* limit to one line at a time */
len = rowsize;
- if (!is_power_of_2(groupsize) || groupsize > 8)
- groupsize = 1;
- if ((len % groupsize) != 0) /* no mixed size output */
- groupsize = 1;
+ if (!is_power_of_2(actual_groupsize) || actual_groupsize > 8)
+ actual_groupsize = 1;
+ if ((len % actual_groupsize) != 0) /* no mixed size output */
+ actual_groupsize = 1;
- ngroups = len / groupsize;
- ascii_column = rowsize * 2 + rowsize / groupsize + 1;
+ ngroups = len / actual_groupsize;
+ ascii_column = rowsize * 2 + rowsize / actual_groupsize + 1;
if (!linebuflen)
goto overflow1;
@@ -134,35 +136,56 @@ int hex_dump_to_buffer(const void *buf, size_t len, int rowsize, int groupsize,
if (!len)
goto nil;
- if (groupsize == 8) {
+ if (actual_groupsize == 8) {
const u64 *ptr8 = buf;
for (j = 0; j < ngroups; j++) {
+ u64 val;
+
+ if (groupsize & DUMP_TYPE_LE)
+ val = get_unaligned_le64(ptr8 + j);
+ else if (groupsize & DUMP_TYPE_BE)
+ val = get_unaligned_be64(ptr8 + j);
+ else
+ val = get_unaligned(ptr8 + j);
ret = snprintf(linebuf + lx, linebuflen - lx,
- "%s%16.16llx", j ? " " : "",
- get_unaligned(ptr8 + j));
+ "%s%16.16llx", j ? " " : "", val);
if (ret >= linebuflen - lx)
goto overflow1;
lx += ret;
}
- } else if (groupsize == 4) {
+ } else if (actual_groupsize == 4) {
const u32 *ptr4 = buf;
for (j = 0; j < ngroups; j++) {
+ u32 val;
+
+ if (groupsize & DUMP_TYPE_LE)
+ val = get_unaligned_le32(ptr4 + j);
+ else if (groupsize & DUMP_TYPE_BE)
+ val = get_unaligned_be32(ptr4 + j);
+ else
+ val = get_unaligned(ptr4 + j);
ret = snprintf(linebuf + lx, linebuflen - lx,
- "%s%8.8x", j ? " " : "",
- get_unaligned(ptr4 + j));
+ "%s%8.8x", j ? " " : "", val);
if (ret >= linebuflen - lx)
goto overflow1;
lx += ret;
}
- } else if (groupsize == 2) {
+ } else if (actual_groupsize == 2) {
const u16 *ptr2 = buf;
for (j = 0; j < ngroups; j++) {
+ u16 val;
+
+ if (groupsize & DUMP_TYPE_LE)
+ val = get_unaligned_le16(ptr2 + j);
+ else if (groupsize & DUMP_TYPE_BE)
+ val = get_unaligned_be16(ptr2 + j);
+ else
+ val = get_unaligned(ptr2 + j);
ret = snprintf(linebuf + lx, linebuflen - lx,
- "%s%4.4x", j ? " " : "",
- get_unaligned(ptr2 + j));
+ "%s%4.4x", j ? " " : "", val);
if (ret >= linebuflen - lx)
goto overflow1;
lx += ret;
@@ -203,7 +226,8 @@ nil:
overflow2:
linebuf[lx++] = '\0';
overflow1:
- return ascii ? ascii_column + len : (groupsize * 2 + 1) * ngroups - 1;
+ return ascii ? ascii_column + len
+ : (actual_groupsize * 2 + 1) * ngroups - 1;
}
EXPORT_SYMBOL(hex_dump_to_buffer);
--
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