2011-02-01 12:45:38

by Roman Fietze

[permalink] [raw]
Subject: Re: [PATCH 0/2] Fixed proposal to add dynamic debug feature for print_hex_dump

Hello Joe,

On Friday, 14.January.2011 19:19:06 Joe Perches wrote:

> A high percentage of these print_hex_dump() uses are
> (,,, 16, 1, buf, len, true) so there's some value
> in doing this.

I found some calls using 16 and 32 bit words to dump their data, e.g.
in UBIFS, NFC, USB IP, MTD Tests and libata, so I think we should
rather ask the callers to add the "16, 1," for byte dumps instead of
rendering hex_dump_xx unusable in quite some cases by defaulting to
byte dumps.

> I suggest simplifying naming to just hex_dump_<level>.

Done.

> Adding a hex_dump_printk function to hexdump.c

If the first of the following two patches will be accepted I can work
on that issue.


Roman

--
Roman Fietze Telemotive AG Buero Muehlhausen
Breitwiesen 73347 Muehlhausen
Tel.: +49(0)7335/18493-45 http://www.telemotive.de


2011-02-01 12:46:59

by Roman Fietze

[permalink] [raw]
Subject: Re: [PATCH 1/2] printk.h dynamic_debug.h: add hex_dump_<level> macros


>From d2a76e8b586bdfb5c77151f4a0b35d0fb25144af Mon Sep 17 00:00:00 2001
From: Roman Fietze <[email protected]>
Date: Tue, 1 Feb 2011 10:41:17 +0100
Subject: [PATCH 1/2] printk.h dynamic_debug.h: add hex_dump_<level> macros

Add macros e.g. named hex_dump_<level> calling print_hex_dump with the
approriate level, with level beeing emerg, alert, ..., dbg. This is
similiar to the functions starting with "pr_" or "dev_".

The parameters for those macros are the same as for print_hex_dump
excluding the level.

Use dynamic printk wrapper to support turning hex_dump_debug on and
off similar to pr_debug using the dynamic debug sysfs control file.

Signed-off-by: Roman Fietze <[email protected]>
---
include/linux/dynamic_debug.h | 20 ++++++++
include/linux/printk.h | 97 +++++++++++++++++++++++++++++++++++++---
2 files changed, 109 insertions(+), 8 deletions(-)

diff --git a/include/linux/dynamic_debug.h b/include/linux/dynamic_debug.h
index 1c70028..be185ca 100644
--- a/include/linux/dynamic_debug.h
+++ b/include/linux/dynamic_debug.h
@@ -64,6 +64,20 @@ extern int ddebug_remove_module(const char *mod_name);
dev_printk(KERN_DEBUG, dev, fmt, ##__VA_ARGS__); \
} while (0)

+#define dynamic_hex_dump_dbg(prefix_str, prefix_type, \
+ rowsize, groupsize, \
+ buf, len, ascii) \
+ do { \
+ static struct _ddebug descriptor \
+ __used \
+ __attribute__((section("__verbose"), aligned(8))) = { \
+ KBUILD_MODNAME, __func__, __FILE__, prefix_str, __LINE__, \
+ _DPRINTK_FLAGS_DEFAULT }; \
+ if (unlikely(descriptor.enabled)) \
+ print_hex_dump(KERN_DEBUG, prefix_str, prefix_type, \
+ rowsize, groupsize, buf, len, ascii); \
+ } while (0)
+
#else

static inline int ddebug_remove_module(const char *mod)
@@ -75,6 +89,12 @@ static inline int ddebug_remove_module(const char *mod)
do { if (0) printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); } while (0)
#define dynamic_dev_dbg(dev, fmt, ...) \
do { if (0) dev_printk(KERN_DEBUG, dev, fmt, ##__VA_ARGS__); } while (0)
+#define dynamic_hex_dump_dbg(prefix_str, prefix_type, \
+ rowsize, groupsize, \
+ buf, len, ascii) \
+ no_print_hex_dump(KERN_DEBUG, prefix_str, prefix_type, \
+ rowsize, groupsize, \
+ buf, len, ascii)
#endif

#endif
diff --git a/include/linux/printk.h b/include/linux/printk.h
index ee048e7..35ef67a 100644
--- a/include/linux/printk.h
+++ b/include/linux/printk.h
@@ -77,8 +77,8 @@ struct va_format {
#define HW_ERR "[Hardware Error]: "

/*
- * Dummy printk for disabled debugging statements to use whilst maintaining
- * gcc's format and side-effect checking.
+ * Dummy printk and print_hex_dump for disabled debugging statements to use
+ * whilst maintaining gcc's format and side-effect checking.
*/
static inline __attribute__ ((format (printf, 1, 2)))
int no_printk(const char *fmt, ...)
@@ -86,6 +86,13 @@ int no_printk(const char *fmt, ...)
return 0;
}

+static inline
+void no_print_hex_dump(const char *level, const char *prefix_str,
+ int prefix_type, int rowsize, int groupsize,
+ const void *buf, size_t len, bool ascii)
+{
+}
+
extern asmlinkage __attribute__ ((format (printf, 1, 2)))
void early_printk(const char *fmt, ...);

@@ -163,26 +170,104 @@ extern void dump_stack(void) __cold;
#define pr_cont(fmt, ...) \
printk(KERN_CONT fmt, ##__VA_ARGS__)

-/* pr_devel() should produce zero code unless DEBUG is defined */
+#define hex_dump_emerg(prefix_str, prefix_type, \
+ rowsize, groupsize, \
+ buf, len, ascii) \
+ print_hex_dump(KERN_EMERG, prefix_str, prefix_type, \
+ rowsize, groupsize, \
+ buf, len, ascii)
+#define hex_dump_alert(prefix_str, prefix_type, \
+ rowsize, groupsize, \
+ buf, len, ascii) \
+ print_hex_dump(KERN_ALERT, prefix_str, prefix_type, \
+ rowsize, groupsize, \
+ buf, len, ascii)
+#define hex_dump_crit(prefix_str, prefix_type, \
+ rowsize, groupsize, \
+ buf, len, ascii) \
+ print_hex_dump(KERN_CRIT, prefix_str, prefix_type, \
+ rowsize, groupsize, \
+ buf, len, ascii)
+#define hex_dump_err(prefix_str, prefix_type, \
+ rowsize, groupsize, \
+ buf, len, ascii) \
+ print_hex_dump(KERN_ERR, prefix_str, prefix_type, \
+ rowsize, groupsize, \
+ buf, len, ascii)
+#define hex_dump_warn(prefix_str, prefix_type, \
+ rowsize, groupsize, \
+ buf, len, ascii) \
+ print_hex_dump(KERN_WARNING, prefix_str, prefix_type, \
+ rowsize, groupsize, \
+ buf, len, ascii)
+#define hex_dump_notice(prefix_str, prefix_type, \
+ rowsize, groupsize, \
+ buf, len, ascii) \
+ print_hex_dump(KERN_NOTICE, prefix_str, prefix_type, \
+ rowsize, groupsize, \
+ buf, len, ascii)
+#define hex_dump_info(prefix_str, prefix_type, \
+ rowsize, groupsize, \
+ buf, len, ascii) \
+ print_hex_dump(KERN_INFO, prefix_str, prefix_type, \
+ rowsize, groupsize, \
+ buf, len, ascii)
+
+/* pr_devel() and pr_devel_hex_dump() should produce zero code unless DEBUG is
+ * defined */
#ifdef DEBUG
#define pr_devel(fmt, ...) \
printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
+#define hex_dump_devel(prefix_str, prefix_type, \
+ rowsize, groupsize, \
+ buf, len, ascii) \
+ print_hex_dump(KERN_DEBUG, \
+ pr_fmt(prefix_str), prefix_type, \
+ rowsize, groupsize, \
+ buf, len, ascii)
#else
#define pr_devel(fmt, ...) \
no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
+#define hex_dump_devel(prefix_str, prefix_type, \
+ rowsize, groupsize, \
+ buf, len, ascii) \
+ no_print_hex_dump(KERN_DEBUG, \
+ pr_fmt(prefix_str), prefix_type, \
+ rowsize, groupsize, \
+ buf, len, ascii)
#endif

/* If you are writing a driver, please use dev_dbg instead */
#if defined(DEBUG)
#define pr_debug(fmt, ...) \
printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
+#define hex_dump_dbg(prefix_str, prefix_type, \
+ rowsize, groupsize, \
+ buf, len, ascii) \
+ print_hex_dump(KERN_DEBUG, \
+ pr_fmt(prefix_str), prefix_type, \
+ rowsize, groupsize, \
+ buf, len, ascii)
#elif defined(CONFIG_DYNAMIC_DEBUG)
/* dynamic_pr_debug() uses pr_fmt() internally so we don't need it here */
#define pr_debug(fmt, ...) \
dynamic_pr_debug(fmt, ##__VA_ARGS__)
+#define hex_dump_dbg(prefix_str, prefix_type, \
+ rowsize, groupsize, \
+ buf, len, ascii) \
+ dynamic_hex_dump_dbg(pr_fmt(prefix_str), prefix_type, \
+ rowsize, groupsize, \
+ buf, len, ascii)
#else
#define pr_debug(fmt, ...) \
no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
+#define hex_dump_dbg(prefix_str, prefix_type, \
+ rowsize, groupsize, \
+ buf, len, ascii) \
+ no_print_hex_dump(KERN_DEBUG, \
+ pr_fmt(prefix_str), prefix_type, \
+ rowsize, groupsize, \
+ buf, len, ascii)
#endif

/*
@@ -287,11 +372,7 @@ extern void print_hex_dump(const char *level, const char *prefix_str,
extern void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
const void *buf, size_t len);
#else
-static inline void print_hex_dump(const char *level, const char *prefix_str,
- int prefix_type, int rowsize, int groupsize,
- const void *buf, size_t len, bool ascii)
-{
-}
+#define print_hex_dump no_print_hex_dump
static inline void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
const void *buf, size_t len)
{
--
1.7.3.4



--
Roman Fietze Telemotive AG Buero Muehlhausen
Breitwiesen 73347 Muehlhausen
Tel.: +49(0)7335/18493-45 http://www.telemotive.de

2011-02-01 12:48:25

by Roman Fietze

[permalink] [raw]
Subject: Re: [PATCH 2/2] hex_dump_dbg: replace all calls to print_hex_dump with level KERN_DEBUG

Hello Joe,

And here, just in case it's wanted or needed, a bigger patch replacing
all print_hex_dump calls using KERN_DEBUG.


>From 153d27fd07a01989f6e0ecc8dbfede132c47610f Mon Sep 17 00:00:00 2001
From: Roman Fietze <[email protected]>
Date: Tue, 1 Feb 2011 13:30:04 +0100
Subject: [PATCH 2/2] hex_dump_dbg: replace all calls to print_hex_dump with level KERN_DEBUG

Replaces all calls to print_hex_dump with log level KERN_DEBUG by
hex_dump_dbg. This allows for debugging using the dynamic printk
feature, or to save code an const data code space, depending on the
kernel config and/or local DEBUG defines.

Signed-off-by: Roman Fietze <[email protected]>
---
drivers/ata/libata-core.c | 4 ++--
drivers/misc/iwmc3200top/log.h | 6 +++---
drivers/misc/ti-st/st_core.c | 2 +-
drivers/mtd/tests/mtd_nandecctest.c | 8 ++++----
drivers/mtd/ubi/debug.c | 10 +++++-----
drivers/mtd/ubi/io.c | 12 ++++++------
drivers/net/8139too.c | 6 +++---
drivers/net/a2065.c | 4 ++--
drivers/net/arcnet/arcnet.c | 8 ++++----
drivers/net/enc28j60.c | 4 ++--
drivers/net/greth.c | 16 ++++++++--------
drivers/net/wireless/iwlwifi/iwl-debug.h | 4 ++--
drivers/net/wireless/ray_cs.c | 6 +++---
drivers/net/wireless/wl1251/wl1251.h | 20 ++++++++++----------
drivers/net/wireless/wl12xx/wl12xx.h | 20 ++++++++++----------
drivers/nfc/pn544.c | 24 ++++++++++++------------
drivers/staging/bcm/Debug.h | 4 ++--
drivers/staging/bcm/HandleControlPacket.c | 4 ++--
drivers/staging/bcm/Transmit.c | 4 ++--
drivers/staging/usbip/usbip_common.c | 4 ++--
drivers/usb/c67x00/c67x00-sched.c | 4 ++--
drivers/usb/core/devio.c | 2 +-
drivers/usb/gadget/storage_common.c | 8 ++++----
fs/ceph/mdsmap.c | 6 +++---
fs/ubifs/debug.c | 8 ++++----
fs/ubifs/scan.c | 2 +-
net/atm/br2684.c | 4 ++--
net/atm/lec.c | 4 ++--
net/ceph/messenger.c | 26 +++++++++++++-------------
net/ceph/osdmap.c | 6 +++---
30 files changed, 120 insertions(+), 120 deletions(-)

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index d4e52e2..d10a683 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -1956,8 +1956,8 @@ retry:
ata_dev_printk(dev, KERN_DEBUG, "dumping IDENTIFY data, "
"class=%d may_fallback=%d tried_spinup=%d\n",
class, may_fallback, tried_spinup);
- print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET,
- 16, 2, id, ATA_ID_WORDS * sizeof(*id), true);
+ hex_dump_dbg("", DUMP_PREFIX_OFFSET,
+ 16, 2, id, ATA_ID_WORDS * sizeof(*id), true);
}

/* Falling back doesn't make sense if ID data was read
diff --git a/drivers/misc/iwmc3200top/log.h b/drivers/misc/iwmc3200top/log.h
index 4434bb1..609fbfd 100644
--- a/drivers/misc/iwmc3200top/log.h
+++ b/drivers/misc/iwmc3200top/log.h
@@ -126,9 +126,9 @@ do { \

#define LOG_HEXDUMP(src, ptr, len) \
do { \
- if (iwmct_logdefs[LOG_SRC_ ## src] & BIT(LOG_SEV_DUMP)) \
- print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_NONE, \
- 16, 1, ptr, len, false); \
+ if (iwmct_logdefs[LOG_SRC_ ## src] & BIT(LOG_SEV_DUMP)) \
+ hex_dump_dbg("", DUMP_PREFIX_NONE, \
+ 16, 1, ptr, len, false); \
} while (0)

void iwmct_log_top_message(struct iwmct_priv *priv, u8 *buf, int len);
diff --git a/drivers/misc/ti-st/st_core.c b/drivers/misc/ti-st/st_core.c
index f9aad06..00f8184 100644
--- a/drivers/misc/ti-st/st_core.c
+++ b/drivers/misc/ti-st/st_core.c
@@ -71,7 +71,7 @@ int st_int_write(struct st_data_s *st_gdata,
}
tty = st_gdata->tty;
#ifdef VERBOSE
- print_hex_dump(KERN_DEBUG, "<out<", DUMP_PREFIX_NONE,
+ hex_dump_dbg("<out<", DUMP_PREFIX_NONE,
16, 1, data, count, 0);
#endif
return tty->ops->write(tty, data, count);
diff --git a/drivers/mtd/tests/mtd_nandecctest.c b/drivers/mtd/tests/mtd_nandecctest.c
index 70d6d7d..a2ddd7b 100644
--- a/drivers/mtd/tests/mtd_nandecctest.c
+++ b/drivers/mtd/tests/mtd_nandecctest.c
@@ -46,11 +46,11 @@ static int nand_ecc_test(const size_t size)
printk(KERN_ERR "mtd_nandecctest: not ok - %s\n", testname);

printk(KERN_DEBUG "hexdump of data:\n");
- print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4,
- data, size, false);
+ hex_dump_dbg("", DUMP_PREFIX_OFFSET, 16, 4,
+ data, size, false);
printk(KERN_DEBUG "hexdump of error data:\n");
- print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4,
- error_data, size, false);
+ hex_dump_dbg("", DUMP_PREFIX_OFFSET, 16, 4,
+ error_data, size, false);

return -1;
}
diff --git a/drivers/mtd/ubi/debug.c b/drivers/mtd/ubi/debug.c
index 4876977..98781f2 100644
--- a/drivers/mtd/ubi/debug.c
+++ b/drivers/mtd/ubi/debug.c
@@ -49,8 +49,8 @@ void ubi_dbg_dump_ec_hdr(const struct ubi_ec_hdr *ec_hdr)
printk(KERN_DEBUG "\thdr_crc %#08x\n",
be32_to_cpu(ec_hdr->hdr_crc));
printk(KERN_DEBUG "erase counter header hexdump:\n");
- print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1,
- ec_hdr, UBI_EC_HDR_SIZE, 1);
+ hex_dump_dbg("", DUMP_PREFIX_OFFSET, 32, 1,
+ ec_hdr, UBI_EC_HDR_SIZE, 1);
}

/**
@@ -74,8 +74,8 @@ void ubi_dbg_dump_vid_hdr(const struct ubi_vid_hdr *vid_hdr)
(unsigned long long)be64_to_cpu(vid_hdr->sqnum));
printk(KERN_DEBUG "\thdr_crc %08x\n", be32_to_cpu(vid_hdr->hdr_crc));
printk(KERN_DEBUG "Volume identifier header hexdump:\n");
- print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1,
- vid_hdr, UBI_VID_HDR_SIZE, 1);
+ hex_dump_dbg("", DUMP_PREFIX_OFFSET, 32, 1,
+ vid_hdr, UBI_VID_HDR_SIZE, 1);
}

/**
@@ -222,7 +222,7 @@ void ubi_dbg_dump_flash(struct ubi_device *ubi, int pnum, int offset, int len)

dbg_msg("dumping %d bytes of data from PEB %d, offset %d",
len, pnum, offset);
- print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1, buf, len, 1);
+ hex_dump_dbg("", DUMP_PREFIX_OFFSET, 32, 1, buf, len, 1);
out:
vfree(buf);
return;
diff --git a/drivers/mtd/ubi/io.c b/drivers/mtd/ubi/io.c
index 811775a..bd62bf4 100644
--- a/drivers/mtd/ubi/io.c
+++ b/drivers/mtd/ubi/io.c
@@ -1314,12 +1314,12 @@ int ubi_dbg_check_write(struct ubi_device *ubi, const void *buf, int pnum,
dump_len = max_t(int, 128, len - i);
ubi_msg("hex dump of the original buffer from %d to %d",
i, i + dump_len);
- print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1,
- buf + i, dump_len, 1);
+ hex_dump_dbg("", DUMP_PREFIX_OFFSET, 32, 1,
+ buf + i, dump_len, 1);
ubi_msg("hex dump of the read buffer from %d to %d",
i, i + dump_len);
- print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1,
- ubi->dbg_peb_buf + i, dump_len, 1);
+ hex_dump_dbg("", DUMP_PREFIX_OFFSET, 32, 1,
+ ubi->dbg_peb_buf + i, dump_len, 1);
ubi_dbg_dump_stack();
err = -EINVAL;
goto out_unlock;
@@ -1371,8 +1371,8 @@ int ubi_dbg_check_all_ff(struct ubi_device *ubi, int pnum, int offset, int len)
fail:
ubi_err("paranoid check failed for PEB %d", pnum);
ubi_msg("hex dump of the %d-%d region", offset, offset + len);
- print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1,
- ubi->dbg_peb_buf, len, 1);
+ hex_dump_dbg("", DUMP_PREFIX_OFFSET, 32, 1,
+ ubi->dbg_peb_buf, len, 1);
err = -EINVAL;
error:
ubi_dbg_dump_stack();
diff --git a/drivers/net/8139too.c b/drivers/net/8139too.c
index 98517a3..ac53ce3 100644
--- a/drivers/net/8139too.c
+++ b/drivers/net/8139too.c
@@ -1944,9 +1944,9 @@ static int rtl8139_rx(struct net_device *dev, struct rtl8139_private *tp,
netif_dbg(tp, rx_status, dev, "%s() status %04x, size %04x, cur %04x\n",
__func__, rx_status, rx_size, cur_rx);
#if RTL8139_DEBUG > 2
- print_hex_dump(KERN_DEBUG, "Frame contents: ",
- DUMP_PREFIX_OFFSET, 16, 1,
- &rx_ring[ring_offset], 70, true);
+ hex_dump_dbg("Frame contents: ",
+ DUMP_PREFIX_OFFSET, 16, 1,
+ &rx_ring[ring_offset], 70, true);
#endif

/* Packet copy from FIFO still in progress.
diff --git a/drivers/net/a2065.c b/drivers/net/a2065.c
index f142cc2..c0fff77 100644
--- a/drivers/net/a2065.c
+++ b/drivers/net/a2065.c
@@ -569,8 +569,8 @@ static netdev_tx_t lance_start_xmit (struct sk_buff *skb,

#ifdef DEBUG_DRIVER
/* dump the packet */
- print_hex_dump(KERN_DEBUG, "skb->data: ", DUMP_PREFIX_NONE,
- 16, 1, skb->data, 64, true);
+ hex_dump_dbg("skb->data: ", DUMP_PREFIX_NONE,
+ 16, 1, skb->data, 64, true);
#endif
entry = lp->tx_new & lp->tx_ring_mod_mask;
ib->btx_ring [entry].length = (-skblen) | 0xf000;
diff --git a/drivers/net/arcnet/arcnet.c b/drivers/net/arcnet/arcnet.c
index a746ba2..5784200 100644
--- a/drivers/net/arcnet/arcnet.c
+++ b/drivers/net/arcnet/arcnet.c
@@ -162,8 +162,8 @@ void arcnet_dump_skb(struct net_device *dev,

/* dump the packet */
snprintf(hdr, sizeof(hdr), "%6s:%s skb->data:", dev->name, desc);
- print_hex_dump(KERN_DEBUG, hdr, DUMP_PREFIX_OFFSET,
- 16, 1, skb->data, skb->len, true);
+ hex_dump_dbg(hdr, DUMP_PREFIX_OFFSET,
+ 16, 1, skb->data, skb->len, true);
}

EXPORT_SYMBOL(arcnet_dump_skb);
@@ -197,8 +197,8 @@ static void arcnet_dump_packet(struct net_device *dev, int bufnum,

/* dump the packet */
snprintf(hdr, sizeof(hdr), "%6s:%s packet dump:", dev->name, desc);
- print_hex_dump(KERN_DEBUG, hdr, DUMP_PREFIX_OFFSET,
- 16, 1, buf, length, true);
+ hex_dump_dbg(hdr, DUMP_PREFIX_OFFSET,
+ 16, 1, buf, length, true);
}

#else
diff --git a/drivers/net/enc28j60.c b/drivers/net/enc28j60.c
index 112c5aa..0c6c201 100644
--- a/drivers/net/enc28j60.c
+++ b/drivers/net/enc28j60.c
@@ -887,8 +887,8 @@ static void enc28j60_dump_rsv(struct enc28j60_net *priv, const char *msg,
static void dump_packet(const char *msg, int len, const char *data)
{
printk(KERN_DEBUG DRV_NAME ": %s - packet len:%d\n", msg, len);
- print_hex_dump(KERN_DEBUG, "pk data: ", DUMP_PREFIX_OFFSET, 16, 1,
- data, len, true);
+ hex_dump_dbg("pk data: ", DUMP_PREFIX_OFFSET, 16, 1,
+ data, len, true);
}

/*
diff --git a/drivers/net/greth.c b/drivers/net/greth.c
index fdb0333..b88930a 100644
--- a/drivers/net/greth.c
+++ b/drivers/net/greth.c
@@ -91,8 +91,8 @@ static void greth_set_multicast_list(struct net_device *dev);

static void greth_print_rx_packet(void *addr, int len)
{
- print_hex_dump(KERN_DEBUG, "RX: ", DUMP_PREFIX_OFFSET, 16, 1,
- addr, len, true);
+ hex_dump_dbg("RX: ", DUMP_PREFIX_OFFSET, 16, 1,
+ addr, len, true);
}

static void greth_print_tx_packet(struct sk_buff *skb)
@@ -105,15 +105,15 @@ static void greth_print_tx_packet(struct sk_buff *skb)
else
length = skb_headlen(skb);

- print_hex_dump(KERN_DEBUG, "TX: ", DUMP_PREFIX_OFFSET, 16, 1,
- skb->data, length, true);
+ hex_dump_dbg("TX: ", DUMP_PREFIX_OFFSET, 16, 1,
+ skb->data, length, true);

for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {

- print_hex_dump(KERN_DEBUG, "TX: ", DUMP_PREFIX_OFFSET, 16, 1,
- phys_to_virt(page_to_phys(skb_shinfo(skb)->frags[i].page)) +
- skb_shinfo(skb)->frags[i].page_offset,
- length, true);
+ hex_dump_dbg("TX: ", DUMP_PREFIX_OFFSET, 16, 1,
+ phys_to_virt(page_to_phys(skb_shinfo(skb)->frags[i].page)) +
+ skb_shinfo(skb)->frags[i].page_offset,
+ length, true);
}
}

diff --git a/drivers/net/wireless/iwlwifi/iwl-debug.h b/drivers/net/wireless/iwlwifi/iwl-debug.h
index ebdea3b..d159579 100644
--- a/drivers/net/wireless/iwlwifi/iwl-debug.h
+++ b/drivers/net/wireless/iwlwifi/iwl-debug.h
@@ -63,8 +63,8 @@ do { \
#define iwl_print_hex_dump(priv, level, p, len) \
do { \
if (iwl_get_debug_level(priv) & level) \
- print_hex_dump(KERN_DEBUG, "iwl data: ", \
- DUMP_PREFIX_OFFSET, 16, 1, p, len, 1); \
+ hex_dump_dbg("iwl data: ", \
+ DUMP_PREFIX_OFFSET, 16, 1, p, len, 1); \
} while (0)

#else
diff --git a/drivers/net/wireless/ray_cs.c b/drivers/net/wireless/ray_cs.c
index 0764d1a..3ba76e0 100644
--- a/drivers/net/wireless/ray_cs.c
+++ b/drivers/net/wireless/ray_cs.c
@@ -2288,9 +2288,9 @@ static void untranslate(ray_dev_t *local, struct sk_buff *skb, int len)

#if 0
if {
- print_hex_dump(KERN_DEBUG, "skb->data before untranslate: ",
- DUMP_PREFIX_NONE, 16, 1,
- skb->data, 64, true);
+ hex_dump_dbg("skb->data before untranslate: ",
+ DUMP_PREFIX_NONE, 16, 1,
+ skb->data, 64, true);
printk(KERN_DEBUG
"type = %08x, xsap = %02x%02x%02x, org = %02x02x02x\n",
ntohs(type), psnap->dsap, psnap->ssap, psnap->ctrl,
diff --git a/drivers/net/wireless/wl1251/wl1251.h b/drivers/net/wireless/wl1251/wl1251.h
index c0ce2c8..b3910d4 100644
--- a/drivers/net/wireless/wl1251/wl1251.h
+++ b/drivers/net/wireless/wl1251/wl1251.h
@@ -75,21 +75,21 @@ enum {
#define wl1251_dump(level, prefix, buf, len) \
do { \
if (level & DEBUG_LEVEL) \
- print_hex_dump(KERN_DEBUG, DRIVER_PREFIX prefix, \
- DUMP_PREFIX_OFFSET, 16, 1, \
- buf, \
- min_t(size_t, len, DEBUG_DUMP_LIMIT), \
- 0); \
+ hex_dump_dbg(DRIVER_PREFIX prefix, \
+ DUMP_PREFIX_OFFSET, 16, 1, \
+ buf, \
+ min_t(size_t, len, DEBUG_DUMP_LIMIT), \
+ 0); \
} while (0)

#define wl1251_dump_ascii(level, prefix, buf, len) \
do { \
if (level & DEBUG_LEVEL) \
- print_hex_dump(KERN_DEBUG, DRIVER_PREFIX prefix, \
- DUMP_PREFIX_OFFSET, 16, 1, \
- buf, \
- min_t(size_t, len, DEBUG_DUMP_LIMIT), \
- true); \
+ hex_dump_dbg(DRIVER_PREFIX prefix, \
+ DUMP_PREFIX_OFFSET, 16, 1, \
+ buf, \
+ min_t(size_t, len, DEBUG_DUMP_LIMIT), \
+ true); \
} while (0)

#define WL1251_DEFAULT_RX_CONFIG (CFG_UNI_FILTER_EN | \
diff --git a/drivers/net/wireless/wl12xx/wl12xx.h b/drivers/net/wireless/wl12xx/wl12xx.h
index 9050dd9..8dab1f3 100644
--- a/drivers/net/wireless/wl12xx/wl12xx.h
+++ b/drivers/net/wireless/wl12xx/wl12xx.h
@@ -86,21 +86,21 @@ extern u32 wl12xx_debug_level;
#define wl1271_dump(level, prefix, buf, len) \
do { \
if (level & wl12xx_debug_level) \
- print_hex_dump(KERN_DEBUG, DRIVER_PREFIX prefix, \
- DUMP_PREFIX_OFFSET, 16, 1, \
- buf, \
- min_t(size_t, len, DEBUG_DUMP_LIMIT), \
- 0); \
+ hex_dump_dbg(DRIVER_PREFIX prefix, \
+ DUMP_PREFIX_OFFSET, 16, 1, \
+ buf, \
+ min_t(size_t, len, DEBUG_DUMP_LIMIT), \
+ 0); \
} while (0)

#define wl1271_dump_ascii(level, prefix, buf, len) \
do { \
if (level & wl12xx_debug_level) \
- print_hex_dump(KERN_DEBUG, DRIVER_PREFIX prefix, \
- DUMP_PREFIX_OFFSET, 16, 1, \
- buf, \
- min_t(size_t, len, DEBUG_DUMP_LIMIT), \
- true); \
+ hex_dump_dbg(DRIVER_PREFIX prefix, \
+ DUMP_PREFIX_OFFSET, 16, 1, \
+ buf, \
+ min_t(size_t, len, DEBUG_DUMP_LIMIT), \
+ true); \
} while (0)

#define WL1271_DEFAULT_RX_CONFIG (CFG_UNI_FILTER_EN | \
diff --git a/drivers/nfc/pn544.c b/drivers/nfc/pn544.c
index bae6472..f87e085 100644
--- a/drivers/nfc/pn544.c
+++ b/drivers/nfc/pn544.c
@@ -143,8 +143,8 @@ static int check_crc(u8 *buf, int buflen)
if (len < 4 || len != buflen || len > PN544_MSG_MAX_SIZE) {
pr_err(PN544_DRIVER_NAME
": CRC; corrupt packet len %u (%d)\n", len, buflen);
- print_hex_dump(KERN_DEBUG, "crc: ", DUMP_PREFIX_NONE,
- 16, 2, buf, buflen, false);
+ hex_dump_dbg("crc: ", DUMP_PREFIX_NONE,
+ 16, 2, buf, buflen, false);
return -EPERM;
}
crc = crc_ccitt(0xffff, buf, len - 2);
@@ -154,8 +154,8 @@ static int check_crc(u8 *buf, int buflen)
pr_err(PN544_DRIVER_NAME ": CRC error 0x%x != 0x%x 0x%x\n",
crc, buf[len-1], buf[len-2]);

- print_hex_dump(KERN_DEBUG, "crc: ", DUMP_PREFIX_NONE,
- 16, 2, buf, buflen, false);
+ hex_dump_dbg("crc: ", DUMP_PREFIX_NONE,
+ 16, 2, buf, buflen, false);
return -EPERM;
}
return 0;
@@ -365,8 +365,8 @@ static ssize_t pn544_read(struct file *file, char __user *buf,
goto out;
}

- print_hex_dump(KERN_DEBUG, "FW read: ", DUMP_PREFIX_NONE,
- 16, 2, info->buf, r, false);
+ hex_dump_dbg("FW read: ", DUMP_PREFIX_NONE,
+ 16, 2, info->buf, r, false);

*offset += r;
if (copy_to_user(buf, info->buf, r)) {
@@ -385,8 +385,8 @@ static ssize_t pn544_read(struct file *file, char __user *buf,
dev_err(&info->i2c_dev->dev, "read failed (%d)\n", r);
goto out;
}
- print_hex_dump(KERN_DEBUG, "read: ", DUMP_PREFIX_NONE,
- 16, 2, info->buf, r, false);
+ hex_dump_dbg("read: ", DUMP_PREFIX_NONE,
+ 16, 2, info->buf, r, false);

*offset += r;
if (copy_to_user(buf, info->buf, r)) {
@@ -466,8 +466,8 @@ static ssize_t pn544_write(struct file *file, const char __user *buf,
goto out;
}

- print_hex_dump(KERN_DEBUG, "FW write: ", DUMP_PREFIX_NONE,
- 16, 2, info->buf, len, false);
+ hex_dump_dbg("FW write: ", DUMP_PREFIX_NONE,
+ 16, 2, info->buf, len, false);

fw_len = PN544_FW_HEADER_SIZE + (info->buf[1] << 8) +
info->buf[2];
@@ -488,8 +488,8 @@ static ssize_t pn544_write(struct file *file, const char __user *buf,
goto out;
}

- print_hex_dump(KERN_DEBUG, "write: ", DUMP_PREFIX_NONE,
- 16, 2, info->buf, len, false);
+ hex_dump_dbg("write: ", DUMP_PREFIX_NONE,
+ 16, 2, info->buf, len, false);

if (len > (info->buf[0] + 1)) /* 1 msg at a time */
len = info->buf[0] + 1;
diff --git a/drivers/staging/bcm/Debug.h b/drivers/staging/bcm/Debug.h
index 3138729..93bdea1 100644
--- a/drivers/staging/bcm/Debug.h
+++ b/drivers/staging/bcm/Debug.h
@@ -237,8 +237,8 @@ typedef struct _S_BCM_DEBUG_STATE {
(Type & Adapter->stDebugState.type) && \
(SubType & Adapter->stDebugState.subtype[Type]))) { \
printk(KERN_DEBUG "%s:\n", __func__); \
- print_hex_dump(KERN_DEBUG, " ", DUMP_PREFIX_OFFSET, \
- 16, 1, buffer, bufferlen, false); \
+ hex_dump_dbg(" ", DUMP_PREFIX_OFFSET, \
+ 16, 1, buffer, bufferlen, false); \
} \
} while(0)

diff --git a/drivers/staging/bcm/HandleControlPacket.c b/drivers/staging/bcm/HandleControlPacket.c
index 2b1e9e1..3ba0b46 100644
--- a/drivers/staging/bcm/HandleControlPacket.c
+++ b/drivers/staging/bcm/HandleControlPacket.c
@@ -21,8 +21,8 @@ static VOID handle_rx_control_packet(PMINI_ADAPTER Adapter, struct sk_buff *skb)
USHORT usStatus = *(PUSHORT)(skb->data);

if (netif_msg_pktdata(Adapter))
- print_hex_dump(KERN_DEBUG, PFX "rx control: ", DUMP_PREFIX_NONE,
- 16, 1, skb->data, skb->len, 0);
+ hex_dump_dbg(PFX "rx control: ", DUMP_PREFIX_NONE,
+ 16, 1, skb->data, skb->len, 0);

switch(usStatus)
{
diff --git a/drivers/staging/bcm/Transmit.c b/drivers/staging/bcm/Transmit.c
index d5e4a74..0f587bc 100644
--- a/drivers/staging/bcm/Transmit.c
+++ b/drivers/staging/bcm/Transmit.c
@@ -67,8 +67,8 @@ INT SendControlPacket(PMINI_ADAPTER Adapter, char *pControlPacket)
return 0;

if (netif_msg_pktdata(Adapter))
- print_hex_dump(KERN_DEBUG, PFX "tx control: ", DUMP_PREFIX_NONE,
- 16, 1, pControlPacket, PLeader->PLength + LEADER_SIZE, 0);
+ hex_dump_dbg(PFX "tx control: ", DUMP_PREFIX_NONE,
+ 16, 1, pControlPacket, PLeader->PLength + LEADER_SIZE, 0);

Adapter->interface_transmit(Adapter->pvInterfaceAdapter,
pControlPacket, (PLeader->PLength + LEADER_SIZE));
diff --git a/drivers/staging/usbip/usbip_common.c b/drivers/staging/usbip/usbip_common.c
index 210ef16..d7f1767 100644
--- a/drivers/staging/usbip/usbip_common.c
+++ b/drivers/staging/usbip/usbip_common.c
@@ -64,8 +64,8 @@ DEVICE_ATTR(usbip_debug, (S_IRUGO | S_IWUSR), show_flag, store_flag);

static void usbip_dump_buffer(char *buff, int bufflen)
{
- print_hex_dump(KERN_DEBUG, "usb-ip", DUMP_PREFIX_OFFSET, 16, 4,
- buff, bufflen, false);
+ hex_dump_dbg("usb-ip", DUMP_PREFIX_OFFSET, 16, 4,
+ buff, bufflen, false);
}

static void usbip_dump_pipe(unsigned int p)
diff --git a/drivers/usb/c67x00/c67x00-sched.c b/drivers/usb/c67x00/c67x00-sched.c
index f6b3c25..cedeee9 100644
--- a/drivers/usb/c67x00/c67x00-sched.c
+++ b/drivers/usb/c67x00/c67x00-sched.c
@@ -167,8 +167,8 @@ static void dbg_td(struct c67x00_hcd *c67x00, struct c67x00_td *td, char *msg)
dev_dbg(dev, "residue: 0x%02x\n", td->residue);
dev_dbg(dev, "next_td_addr: 0x%04x\n", td_next_td_addr(td));
dev_dbg(dev, "data:");
- print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 1,
- td->data, td_length(td), 1);
+ hex_dump_dbg("", DUMP_PREFIX_OFFSET, 16, 1,
+ td->data, td_length(td), 1);
}
#else /* DEBUG */

diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index a7131ad..e571b58 100644
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -345,7 +345,7 @@ static void snoop_urb(struct usb_device *udev,
}

if (data && data_len > 0) {
- print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_NONE, 32, 1,
+ hex_dump_dbg("data: ", DUMP_PREFIX_NONE, 32, 1,
data, data_len, 1);
}
}
diff --git a/drivers/usb/gadget/storage_common.c b/drivers/usb/gadget/storage_common.c
index b015561..45d4f11 100644
--- a/drivers/usb/gadget/storage_common.c
+++ b/drivers/usb/gadget/storage_common.c
@@ -122,8 +122,8 @@
/* const u8 * */ buf, /* unsigned */ length) do { \
if (length < 512) { \
DBG(fsg, "%s, length %u:\n", label, length); \
- print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, \
- 16, 1, buf, length, 0); \
+ hex_dump_dbg("", DUMP_PREFIX_OFFSET, \
+ 16, 1, buf, length, 0); \
} \
} while (0)

@@ -137,8 +137,8 @@
# ifdef VERBOSE_DEBUG

# define dump_cdb(fsg) \
- print_hex_dump(KERN_DEBUG, "SCSI CDB: ", DUMP_PREFIX_NONE, \
- 16, 1, (fsg)->cmnd, (fsg)->cmnd_size, 0) \
+ hex_dump_dbg("SCSI CDB: ", DUMP_PREFIX_NONE, \
+ 16, 1, (fsg)->cmnd, (fsg)->cmnd_size, 0) \

# else

diff --git a/fs/ceph/mdsmap.c b/fs/ceph/mdsmap.c
index 73b7d44..1b78c8f 100644
--- a/fs/ceph/mdsmap.c
+++ b/fs/ceph/mdsmap.c
@@ -160,9 +160,9 @@ badmem:
err = -ENOMEM;
bad:
pr_err("corrupt mdsmap\n");
- print_hex_dump(KERN_DEBUG, "mdsmap: ",
- DUMP_PREFIX_OFFSET, 16, 1,
- start, end - start, true);
+ hex_dump_dbg("mdsmap: ",
+ DUMP_PREFIX_OFFSET, 16, 1,
+ start, end - start, true);
ceph_mdsmap_destroy(m);
return ERR_PTR(-EINVAL);
}
diff --git a/fs/ubifs/debug.c b/fs/ubifs/debug.c
index 0bee4db..7596ed1 100644
--- a/fs/ubifs/debug.c
+++ b/fs/ubifs/debug.c
@@ -288,8 +288,8 @@ void dbg_dump_node(const struct ubifs_info *c, const void *node)
/* If the magic is incorrect, just hexdump the first bytes */
if (le32_to_cpu(ch->magic) != UBIFS_NODE_MAGIC) {
printk(KERN_DEBUG "Not a node, first %zu bytes:", UBIFS_CH_SZ);
- print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1,
- (void *)node, UBIFS_CH_SZ, 1);
+ hex_dump_dbg("", DUMP_PREFIX_OFFSET, 32, 1,
+ (void *)node, UBIFS_CH_SZ, 1);
return;
}

@@ -509,8 +509,8 @@ void dbg_dump_node(const struct ubifs_info *c, const void *node)
printk(KERN_DEBUG "\tdata size %d\n",
dlen);
printk(KERN_DEBUG "\tdata:\n");
- print_hex_dump(KERN_DEBUG, "\t", DUMP_PREFIX_OFFSET, 32, 1,
- (void *)&dn->data, dlen, 0);
+ hex_dump_dbg("\t", DUMP_PREFIX_OFFSET, 32, 1,
+ (void *)&dn->data, dlen, 0);
break;
}
case UBIFS_TRUN_NODE:
diff --git a/fs/ubifs/scan.c b/fs/ubifs/scan.c
index 3e1ee57..fa2d0a9 100644
--- a/fs/ubifs/scan.c
+++ b/fs/ubifs/scan.c
@@ -246,7 +246,7 @@ void ubifs_scanned_corruption(const struct ubifs_info *c, int lnum, int offs,
if (len > 8192)
len = 8192;
dbg_err("first %d bytes from LEB %d:%d", len, lnum, offs);
- print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 4, buf, len, 1);
+ hex_dump_dbg("", DUMP_PREFIX_OFFSET, 32, 4, buf, len, 1);
}

/**
diff --git a/net/atm/br2684.c b/net/atm/br2684.c
index fce2eae..667698d 100644
--- a/net/atm/br2684.c
+++ b/net/atm/br2684.c
@@ -33,8 +33,8 @@ static void skb_debug(const struct sk_buff *skb)
{
#ifdef SKB_DEBUG
#define NUM2PRINT 50
- print_hex_dump(KERN_DEBUG, "br2684: skb: ", DUMP_OFFSET,
- 16, 1, skb->data, min(NUM2PRINT, skb->len), true);
+ hex_dump_dbg("br2684: skb: ", DUMP_OFFSET,
+ 16, 1, skb->data, min(NUM2PRINT, skb->len), true);
#endif
}

diff --git a/net/atm/lec.c b/net/atm/lec.c
index 38754fd..6be1be1 100644
--- a/net/atm/lec.c
+++ b/net/atm/lec.c
@@ -318,8 +318,8 @@ static netdev_tx_t lec_start_xmit(struct sk_buff *skb,
#if DUMP_PACKETS >= 1
printk(KERN_DEBUG "%s: send datalen:%ld lecid:%4.4x\n",
dev->name, skb->len, priv->lecid);
- print_hex_dump(KERN_DEBUG, "", DUMP_OFFSET, 16, 1,
- skb->data, min(skb->len, MAX_DUMP_SKB), true);
+ hex_dump_dbg("", DUMP_OFFSET, 16, 1,
+ skb->data, min(skb->len, MAX_DUMP_SKB), true);
#endif /* DUMP_PACKETS >= 1 */

/* Minimum ethernet-frame size */
diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c
index dff633d..8471f97 100644
--- a/net/ceph/messenger.c
+++ b/net/ceph/messenger.c
@@ -2390,19 +2390,19 @@ void ceph_msg_dump(struct ceph_msg *msg)
{
pr_debug("msg_dump %p (front_max %d nr_pages %d)\n", msg,
msg->front_max, msg->nr_pages);
- print_hex_dump(KERN_DEBUG, "header: ",
- DUMP_PREFIX_OFFSET, 16, 1,
- &msg->hdr, sizeof(msg->hdr), true);
- print_hex_dump(KERN_DEBUG, " front: ",
- DUMP_PREFIX_OFFSET, 16, 1,
- msg->front.iov_base, msg->front.iov_len, true);
+ hex_dump_dbg("header: ",
+ DUMP_PREFIX_OFFSET, 16, 1,
+ &msg->hdr, sizeof(msg->hdr), true);
+ hex_dump_dbg(" front: ",
+ DUMP_PREFIX_OFFSET, 16, 1,
+ msg->front.iov_base, msg->front.iov_len, true);
if (msg->middle)
- print_hex_dump(KERN_DEBUG, "middle: ",
- DUMP_PREFIX_OFFSET, 16, 1,
- msg->middle->vec.iov_base,
- msg->middle->vec.iov_len, true);
- print_hex_dump(KERN_DEBUG, "footer: ",
- DUMP_PREFIX_OFFSET, 16, 1,
- &msg->footer, sizeof(msg->footer), true);
+ hex_dump_dbg("middle: ",
+ DUMP_PREFIX_OFFSET, 16, 1,
+ msg->middle->vec.iov_base,
+ msg->middle->vec.iov_len, true);
+ hex_dump_dbg("footer: ",
+ DUMP_PREFIX_OFFSET, 16, 1,
+ &msg->footer, sizeof(msg->footer), true);
}
EXPORT_SYMBOL(ceph_msg_dump);
diff --git a/net/ceph/osdmap.c b/net/ceph/osdmap.c
index 71603ac..e70967d 100644
--- a/net/ceph/osdmap.c
+++ b/net/ceph/osdmap.c
@@ -917,9 +917,9 @@ struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
bad:
pr_err("corrupt inc osdmap epoch %d off %d (%p of %p-%p)\n",
epoch, (int)(*p - start), *p, start, end);
- print_hex_dump(KERN_DEBUG, "osdmap: ",
- DUMP_PREFIX_OFFSET, 16, 1,
- start, end - start, true);
+ hex_dump_dbg("osdmap: ",
+ DUMP_PREFIX_OFFSET, 16, 1,
+ start, end - start, true);
if (newcrush)
crush_destroy(newcrush);
return ERR_PTR(err);
--
1.7.3.4


--
Roman Fietze Telemotive AG Buero Muehlhausen
Breitwiesen 73347 Muehlhausen
Tel.: +49(0)7335/18493-45 http://www.telemotive.de

2011-02-02 01:27:46

by Joe Perches

[permalink] [raw]
Subject: Re: [PATCH 2/2] hex_dump_dbg: replace all calls to print_hex_dump with level KERN_DEBUG

On Tue, 2011-02-01 at 13:48 +0100, Roman Fietze wrote:
> And here, just in case it's wanted or needed, a bigger patch replacing
> all print_hex_dump calls using KERN_DEBUG.

[]

I think a lot of these changes are senseless.

print_hex_dump is a perfectly good call and doesn't
always need to be replaced by something else.

For instance:

> diff --git a/net/atm/lec.c b/net/atm/lec.c
> index 38754fd..6be1be1 100644
> --- a/net/atm/lec.c
> +++ b/net/atm/lec.c
> @@ -318,8 +318,8 @@ static netdev_tx_t lec_start_xmit(struct sk_buff *skb,
> #if DUMP_PACKETS >= 1
> printk(KERN_DEBUG "%s: send datalen:%ld lecid:%4.4x\n",
> dev->name, skb->len, priv->lecid);
> - print_hex_dump(KERN_DEBUG, "", DUMP_OFFSET, 16, 1,
> - skb->data, min(skb->len, MAX_DUMP_SKB), true);
> + hex_dump_dbg("", DUMP_OFFSET, 16, 1,
> + skb->data, min(skb->len, MAX_DUMP_SKB), true);

print_hex_dump is already guarded by an #if block.
Adding another DEBUG guard and optional on/off
control does not add any utility.

> diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c
[]
> @@ -2390,19 +2390,19 @@ void ceph_msg_dump(struct ceph_msg *msg)
> {
> pr_debug("msg_dump %p (front_max %d nr_pages %d)\n", msg,
> msg->front_max, msg->nr_pages);
> - print_hex_dump(KERN_DEBUG, "header: ",
> - DUMP_PREFIX_OFFSET, 16, 1,
> - &msg->hdr, sizeof(msg->hdr), true);
> - print_hex_dump(KERN_DEBUG, " front: ",
> - DUMP_PREFIX_OFFSET, 16, 1,
> - msg->front.iov_base, msg->front.iov_len, true);
> + hex_dump_dbg("header: ",
> + DUMP_PREFIX_OFFSET, 16, 1,
> + &msg->hdr, sizeof(msg->hdr), true);
> + hex_dump_dbg(" front: ",
> + DUMP_PREFIX_OFFSET, 16, 1,
> + msg->front.iov_base, msg->front.iov_len, true);

These are sensible, as there is no other guard and
the immediately preceding message uses pr_debug and so
these uses should not always be output.

Could you please not just do
s/print_hex_dump(KERN_DEBUG, /hex_dump_dbg(/g
and inspect each instance for appropriateness.