linux-kernel - Re: early_printk accessing __log

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Message-ID: <8bd0f97a0707310047u51c6e46l7e57e8f7bfc4e858@mail.gmail.com>
Date:	Tue, 31 Jul 2007 03:47:59 -0400
From:	"Mike Frysinger" <vapier.adi@...il.com>
To:	"Andrew Morton" <akpm@...ux-foundation.org>
Cc:	"Robin Getz" <rgetz@...ckfin.uclinux.org>,
	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 7/24/07, Andrew Morton <akpm@...ux-foundation.org> wrote:
> On Tue, 24 Jul 2007 16:12:56 -0400 Robin Getz 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.

attached
-mike

Download attachment "linux-log_buf_read.patch" of type "application/octet-stream" (2449 bytes)