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    Subject[RFC PATCH] kernel.h: Add pr_debug_noopt
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    Many times a developer always wants to emit a KERN_DEBUG level
    logging message even if DEBUG is not defined.

    These messages today do not have a "pr_<level>" equivalent
    and must be coded with printk(KERN_DEBUG.

    This means that pr_fmt is not used with these logging messages.

    I propose a new shortcut #define pr_<level> be added to kernel.h
    to handle these KERN_DEBUG cases not prefixed with pr_fmt.

    I'm not happy with the name. Some good alternatives are
    already in use in a couple of places.

    pr_dbg is #defined in drivers/char/isicom.c
    pr_vdebug is #defined in drivers/usb/gadget/u_serial.c

    I think it's appropriate to remove and substitute one
    or both of these #defines from the files in drivers
    and use one or both in kernel.h

    Suggestions?

    diff --git a/include/linux/kernel.h b/include/linux/kernel.h
    index d3cd23f..f1f53b9 100644
    --- a/include/linux/kernel.h
    +++ b/include/linux/kernel.h
    @@ -380,6 +380,8 @@ static inline char *pack_hex_byte(char *buf, u8 byte)
    printk(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
    #define pr_info(fmt, ...) \
    printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
    +#define pr_debug_noopt(fmt, ...) \
    + printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
    #define pr_cont(fmt, ...) \
    printk(KERN_CONT fmt, ##__VA_ARGS__)




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