Re: [PATCH] lib/vsprintf: add %pT[C012] format specifier

From: Joe Perches
Date: Wed Jan 01 2014 - 00:50:03 EST

On Wed, 2014-01-01 at 14:34 +0900, Tetsuo Handa wrote:
> I think we want formatting directive support because we have users shown below.
> fs/afs/internal.h: printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
> fs/cachefiles/internal.h: printk(KERN_DEBUG "[%-6.6s] "FMT"\n", current->comm, ##__VA_ARGS__)
> fs/fscache/internal.h: printk(KERN_DEBUG "[%-6.6s] "FMT"\n", current->comm, ##__VA_ARGS__)

Maybe, but I still think it's not particularly useful
and should not be possible/isn't necessary.

> This choice (i.e. reserve only '\xFF') is more resource economy than my
> previous choice (i.e. reserve '\x7F' to '\xFF') at the cost of wasting only
> one byte compared to my previous choice.

I supposed that's better.

Is there a particularly utility/reason to use 0xff
vs ascii SUB/PU1/PU2?

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