From: Peter Zijlstra <peterz@infradead.org>
To: Ingo Molnar <mingo@kernel.org>
Cc: Igor Mammedov <imammedo@redhat.com>, Jiang Liu <liuj97@gmail.com>,
linux-kernel@vger.kernel.org, pjt@google.com, tglx@linutronix.de,
seto.hidetoshi@jp.fujitsu.com,
Andrew Morton <akpm@linux-foundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: [RFC][PATCH] printk: Add %pb to print bitmaps
Date: Wed, 09 May 2012 16:24:17 +0200 [thread overview]
Message-ID: <1336573457.2527.50.camel@twins> (raw)
In-Reply-To: <20120509141528.GA3623@gmail.com>
On Wed, 2012-05-09 at 16:15 +0200, Ingo Molnar wrote:
> So, if someone specifies an incomplete "%pb" format - fmt[1]
> will be 0 and we take precision as the length - presumably also
> 0.
yes, printf_spec is initialized to 0s.
> We stick that 0 into:
>
> > + len = bitmap_scnlistprintf(buf, end - buf, ptr, bits);
>
> Will that work?
Yes, bitmap_scnlistprintf() will only set buf[0] = 0 (which will be
overwritten by a possible next printf token) and return 0 length not
advancing the ptr.
next prev parent reply other threads:[~2012-05-09 14:24 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-09 10:38 [PATCH] sched_groups are expected to be circular linked list, make it so right after allocation Igor Mammedov
2012-05-09 10:21 ` Jiang Liu
2012-05-09 11:44 ` Igor Mammedov
2012-05-09 11:52 ` Peter Zijlstra
2012-05-09 11:58 ` Igor Mammedov
2012-05-09 12:21 ` Peter Zijlstra
2012-05-09 12:22 ` Peter Zijlstra
2012-05-09 12:35 ` Igor Mammedov
2012-05-09 12:30 ` Peter Zijlstra
2012-05-09 13:27 ` [RFC][PATCH] printk: Add %pb to print bitmaps Peter Zijlstra
2012-05-09 13:29 ` Peter Zijlstra
2012-05-09 13:36 ` Ingo Molnar
2012-05-09 13:44 ` Peter Zijlstra
2012-05-09 13:59 ` Peter Zijlstra
2012-05-09 14:15 ` Ingo Molnar
2012-05-09 14:24 ` Peter Zijlstra [this message]
2012-05-09 15:32 ` Peter Zijlstra
2012-05-09 15:41 ` Ingo Molnar
2012-05-09 16:06 ` Peter Zijlstra
2012-05-09 16:39 ` Joe Perches
2012-05-09 17:22 ` Ingo Molnar
2012-05-09 17:24 ` Ingo Molnar
2012-05-09 17:25 ` Peter Zijlstra
2012-05-09 17:31 ` Ingo Molnar
2012-05-09 14:19 ` Joe Perches
2012-05-09 15:34 ` Ingo Molnar
2012-05-09 17:15 ` Linus Torvalds
2012-05-09 17:22 ` Peter Zijlstra
2012-05-09 17:26 ` Ingo Molnar
2012-05-09 17:30 ` Peter Zijlstra
2012-05-09 19:07 ` Andrew Morton
2012-05-09 20:58 ` Peter Zijlstra
2012-05-10 7:45 ` Ingo Molnar
2012-05-10 13:26 ` [PATCH] sched_groups are expected to be circular linked list, make it so right after allocation Igor Mammedov
2012-05-10 13:45 ` Peter Zijlstra
2012-05-10 17:01 ` Igor Mammedov
2012-05-10 17:33 ` Peter Zijlstra
2012-05-09 10:35 ` [tip:sched/urgent] sched: Fix KVM and ia64 boot crash due to sched_groups circular linked list assumption tip-bot for Igor Mammedov
2012-05-09 11:41 ` [PATCH] sched_groups are expected to be circular linked list, make it so right after allocation Peter Zijlstra
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