RE: [PATCH] vsprintf: Do not break early boot with probing addresses

[David Laight]

> And I like Steven's "(fault)" idea.
> How about this:
> 
>       if ptr < PAGE_SIZE              -> "(null)"
>       if IS_ERR_VALUE(ptr)            -> "(fault)"
> 
>       -ss

Or:
        if (ptr < PAGE_SIZE)
                return ptr ? "(null+)" : "(null)";
        if IS_ERR_VALUE(ptr)
                return "(errno)"

        David

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