From: Andrew Morton <akpm@linux-foundation.org>
To: xypron.glpk@gmx.de
Cc: gxt@mprc.pku.edu.cn, paul.gortmaker@windriver.com,
vapier@gentoo.org, totglx@linutronix.de,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/1] __init setup_early_printk: missing initialization
Date: Mon, 27 Jan 2014 13:49:59 -0800 [thread overview]
Message-ID: <20140127134959.72c65d0091554e36d1755ab0@linux-foundation.org> (raw)
In-Reply-To: <1390846224-6995-1-git-send-email-xypron.glpk@gmx.de>
On Mon, 27 Jan 2014 19:10:24 +0100 xypron.glpk@gmx.de wrote:
> From: Heinrich Schuchardt <xypron.glpk@gmx.de>
>
> If is based on uninitialized value keep_early.
> This leads to unpredictable result.
>
> ...
>
> --- a/arch/unicore32/kernel/early_printk.c
> +++ b/arch/unicore32/kernel/early_printk.c
> @@ -35,7 +35,7 @@ static struct console early_ocd_console = {
>
> static int __init setup_early_printk(char *buf)
> {
> - int keep_early;
> + int keep_early = 0;
>
> if (!buf || early_console)
> return 0;
yup.
But that code is quite overcooked. How about this?
--- a/arch/unicore32/kernel/early_printk.c~arch-unicore32-kernel-early_printkc-setup_early_printk-missing-initialization-fix
+++ a/arch/unicore32/kernel/early_printk.c
@@ -35,17 +35,11 @@ static struct console early_ocd_console
static int __init setup_early_printk(char *buf)
{
- int keep_early = 0;
-
if (!buf || early_console)
return 0;
- if (strstr(buf, "keep"))
- keep_early = 1;
-
early_console = &early_ocd_console;
-
- if (keep_early)
+ if (strstr(buf, "keep"))
early_console->flags &= ~CON_BOOT;
else
early_console->flags |= CON_BOOT;
_
next prev parent reply other threads:[~2014-01-27 21:50 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-27 18:10 xypron.glpk
2014-01-27 21:49 ` Andrew Morton [this message]
2014-01-27 22:58 ` Heinrich Schuchardt
2014-01-28 8:05 ` 回复： " 管雪涛
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