Re: [PATCH v2 09/24] dyndbg: add maybe(str,"") macro to reduce code

[Joe Perches]

On Sat, 2020-06-13 at 09:57 -0600, Jim Cromie wrote:
> reduce word count via macro, no actual object change.
> 
> OTOH, maybe() could be scrubbed if printk's default printing (iirc) of
> "(null)" pointers is deemed appropriate for the log-msg.
[]
> diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
[]
> @@ -114,6 +114,7 @@ do {								\
>  #define vpr_info(fmt, ...)	vnpr_info(1, fmt, ##__VA_ARGS__)
>  #define v2pr_info(fmt, ...)	vnpr_info(2, fmt, ##__VA_ARGS__)
>  
> +#define maybe(str, empty)	( str ? str : empty )

This macro is unnecessary.

An even shorter very commonly used gcc extension would be

	str ?: empty