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Message-ID: <4A014391.7020203@cn.fujitsu.com>
Date: Wed, 06 May 2009 16:00:17 +0800
From: Li Zefan <lizf@...fujitsu.com>
To: Ingo Molnar <mingo@...e.hu>
CC: Yinghai Lu <yinghai@...nel.org>,
Frederic Weisbecker <fweisbec@...il.com>,
Jeremy Fitzhardinge <jeremy@...p.org>,
Zhaolei <zhaolei@...fujitsu.com>,
Steven Rostedt <rostedt@...dmis.org>,
Vegard Nossum <vegard.nossum@...il.com>,
Andrew Morton <akpm@...ux-foundation.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Lai Jiangshan <laijs@...fujitsu.com>
Subject: Re: printk %0*X is broken.
Ingo Molnar wrote:
> Cc:-ed more folks who modified lib/vsprintf.c recently.
>
I'm CC-ed, but I never ever touched lib/vsprintf.c. ;)
Lai Jiangshan will look into this issue.
> Ingo
>
> * Yinghai Lu <yinghai@...nel.org> wrote:
>
>> it seems someone broke
>>
>> printk( "%0*X\n", width, x);
>>
>> looks like 0 is dumped.
>>
>> YH
>>
>> [ 0.000000] MTRR variable ranges enabled:
>> [ 0.000000] 0 base 0 00000000 mask FF0 00000000 write-back
>> [ 0.000000] 1 base 10 00000000 mask FFF 80000000 write-back
>> [ 0.000000] 2 base 0 80000000 mask FFF 80000000 uncachable
>> [ 0.000000] 3 base 0 7F800000 mask FFF FF800000 uncachable
>>
>>
>> code:
>> for (i = 0; i < num_var_ranges; ++i) {
>> if (mtrr_state.var_ranges[i].mask_lo & (1 << 11))
>> printk(KERN_DEBUG " %u base %0*X%05X000 mask %0*X%05X000 %s\n",
>> i,
>> high_width,
>> mtrr_state.var_ranges[i].base_hi,
>> mtrr_state.var_ranges[i].base_lo >> 12,
>> high_width,
>> mtrr_state.var_ranges[i].mask_hi,
>> mtrr_state.var_ranges[i].mask_lo >> 12,
>> mtrr_attrib_to_str(mtrr_state.var_ranges[i].base_lo & 0xff));
>> else
>> printk(KERN_DEBUG " %u disabled\n", i);
>> }
>>
>
>
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