linux-kernel - Re: [PATCH 6/7] s390: time: Provide read_boot_clock64() and read_persistent

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Message-ID: <20150521062304.GE11077@gmail.com>
Date:	Thu, 21 May 2015 08:23:04 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	John Stultz <john.stultz@...aro.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Xunlei Pang <pang.xunlei@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>, linux390@...ibm.com
Subject: Re: [PATCH 6/7] s390: time: Provide read_boot_clock64() and
 read_persistent_clock64()


* John Stultz <john.stultz@...aro.org> wrote:

> From: Xunlei Pang <pang.xunlei@...aro.org>
> 
> As part of addressing "y2038 problem" for in-kernel uses, this
> patch converts read_boot_clock() to read_boot_clock64() and
> read_persistent_clock() to read_persistent_clock64() using
> timespec64.

s/addressing "y2037 problem"/
  addressing the "y2037 problem"

> Rename some timespec to timespec64 in time.c and related references.

This sentence does not parse. Did you want to say:

  Rename some instances of 'timespec' to 'timespec64' in time.c and 
  related references.

?

> @@ -108,10 +109,10 @@ int get_sync_clock(unsigned long long *clock);
>  void init_cpu_timer(void);
>  unsigned long long monotonic_clock(void);
>  
> -void tod_to_timeval(__u64, struct timespec *);
> +void tod_to_timeval(__u64, struct timespec64 *);

Please use proper prototypes with parameters spelled out as well, so 
that people grepping for APIs don't have to guess too much.

> -	rc += sprintf(out_buf, "%02i %011lu:%06lu %1u %1s %02i %p  ",
> -		      area, time_spec.tv_sec, time_spec.tv_nsec / 1000, level,
> -		      except_str, entry->id.fields.cpuid, (void *) caller);
> +	rc += sprintf(out_buf, "%02i %011lld:%06lu %1u %1s %02i %p  ",
> +		      area, (long long) time_spec.tv_sec,
> +		      time_spec.tv_nsec / 1000, level, except_str,
> +		      entry->id.fields.cpuid, (void *) caller);

Unnecessary space before the casts.

Thanks,

	Ingo
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