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Subject[RFC] dynamic debug: add dynamic_hexdump_debug macro
Date
dynamic_hexdump_debug(str, buf, len)

usage:
dynamic_hexdump_debug("mwifiex data: tx_buf:\n", tx_buf, 32);

Signed-off-by: Bing Zhao <bzhao@marvell.com>
---
include/linux/dynamic_debug.h | 22 ++++++++++++++++++++++
include/linux/printk.h | 14 ++++++++++++++
2 files changed, 36 insertions(+), 0 deletions(-)

diff --git a/include/linux/dynamic_debug.h b/include/linux/dynamic_debug.h
index 1c70028..a7296fb 100644
--- a/include/linux/dynamic_debug.h
+++ b/include/linux/dynamic_debug.h
@@ -64,6 +64,19 @@ extern int ddebug_remove_module(const char *mod_name);
dev_printk(KERN_DEBUG, dev, fmt, ##__VA_ARGS__); \
} while (0)

+#define dynamic_hexdump_debug(str, buf, len) \
+do { \
+ static struct _ddebug descriptor \
+ __used \
+ __attribute__((section("__verbose"), aligned(8))) = \
+ { KBUILD_MODNAME, __func__, __FILE__, str, __LINE__, \
+ _DPRINTK_FLAGS_DEFAULT }; \
+ if (unlikely(descriptor.enabled)) { \
+ printk(KERN_DEBUG str); \
+ print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, buf, len); \
+ } \
+} while (0)
+
#else

static inline int ddebug_remove_module(const char *mod)
@@ -75,6 +88,15 @@ 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_hexdump_debug(str, buf, len) \
+do { \
+ if (0) { \
+ printk(KERN_DEBUG str); \
+ print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, buf, len); \
+ } \
+} while (0)
+
#endif

#endif
diff --git a/include/linux/printk.h b/include/linux/printk.h
index ee048e7..c758131 100644
--- a/include/linux/printk.h
+++ b/include/linux/printk.h
@@ -299,4 +299,18 @@ static inline void print_hex_dump_bytes(const char *prefix_str, int prefix_type,

#endif

+#if defined(DEBUG)
+#define hexdump_debug(str, buf, len) \
+do { \
+ printk(KERN_DEBUG str); \
+ print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, buf, len); \
+} while (0)
+#elif defined(CONFIG_DYNAMIC_DEBUG)
+#define hexdump_debug(str, buf, len) \
+ dynamic_hexdump_debug(str, buf, len)
+#else
+#define hexdump_debug(str, buf, len) \
+ no_printk(KERN_DEBUG str)
+#endif
+
#endif
--
1.7.0.2


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