linux-kernel - Re: [PATCH] Since we have counters in __u64 format we have to print them with %llu macros.

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Message-ID: <46FAA373.9010607@zytor.com>
Date:	Wed, 26 Sep 2007 11:22:43 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	balbir@...ux.vnet.ibm.com
CC:	Andreas Schwab <schwab@...e.de>,
	Maxim Uvarov <muvarov@...mvista.com>,
	LKML <linux-kernel@...r.kernel.org>, balbir@...ibm.com,
	jlan@...r.sgi.com
Subject: Re: [PATCH] Since we have counters in __u64 format we have to print
 them with %llu macros.

Balbir Singh wrote:
> Andreas Schwab wrote:
>> Maxim Uvarov <muvarov@...mvista.com> writes:
>>
>>> diff --git a/Documentation/accounting/getdelays.c b/Documentation/accounting/getdelays.c
>>> index cbee3a2..73924df 100644
>>> --- a/Documentation/accounting/getdelays.c
>>> +++ b/Documentation/accounting/getdelays.c
>>> @@ -208,7 +208,7 @@ void print_delayacct(struct taskstats *t)
>>>  void task_context_switch_counts(struct taskstats *t)
>>>  {
>>>  	printf("\n\nTask   %15s%15s\n"
>>> -	       "       %15lu%15lu\n",
>>> +	       "       %15llu%15llu\n",
>>>  	       "voluntary", "nonvoluntary",
>>>  	       t->nvcsw, t->nivcsw);
>> __u64 is not always long long.
> 
> What is the maximum size of long long across all architectures?
> How does one format __u64 for printing?
> 

In user space, use the macro PRIu64 (or PRIx64 etc) from <inttypes.h>.

	-hpa
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