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    Subject[RFC v2 1/2] dynamic debug: add dynamic_hexdump_debug macro
    Date
    dynamic_hexdump_debug(str, buf, len)

    str: "subject string"
    buf: buffer pointer
    len: length of the buffer being printed

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

    diff --git a/include/linux/dynamic_debug.h b/include/linux/dynamic_debug.h
    index 0c9653f..429a176 100644
    --- a/include/linux/dynamic_debug.h
    +++ b/include/linux/dynamic_debug.h
    @@ -70,6 +70,19 @@ extern int __dynamic_pr_debug(struct _ddebug *descriptor, const char *fmt, ...)
    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)
    @@ -81,6 +94,15 @@ 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
    --
    1.6.2.5


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