linux-kernel - Re: early_printk accessing __log

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Message-Id: <20070724143004.6325a511.akpm@linux-foundation.org>
Date:	Tue, 24 Jul 2007 14:30:04 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Robin Getz <rgetz@...ckfin.uclinux.org>
Cc:	"Mike Frysinger" <vapier.adi@...il.com>,
	linux-kernel@...r.kernel.org, "Greg Ungerer" <gerg@...pgear.com>,
	"Russell King" <rmk@....linux.org.uk>,
	"Paul Mundt" <lethal@...ux-sh.org>,
	"Tim Bird" <tim.bird@...sony.com>, bryan.wu@...log.com
Subject: Re: early_printk accessing __log_buf

On Tue, 24 Jul 2007 16:12:56 -0400
Robin Getz <rgetz@...ckfin.uclinux.org> wrote:

> On Tue 24 Jul 2007 14:12, Andrew Morton pondered:
> > Oh well, it sounds like we need the super-duper fast version.  Keep it
> > as simple as possible, please.
> 
> What about:
> 
> int log_buf_copy(void *dest, int idx, size_t n);
> 
> starting at index idx - copy n bytes to dest, return the number of bytes 
> copied (in case there are not n bytes in the log_buf yet).

Sounds sensible.  I'd make it return size_t and take a char* arg though.
Or just use `int' - size_t is a bit of a pain and this is all kernel-internal
anwyay.
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