linux-kernel - Re: [PATCH v2] char: ipmi: ipmi_ssif: Replace timeval with timespec64

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Date:	Fri, 23 Oct 2015 15:18:55 -0500
From:	Corey Minyard <minyard@....org>
To:	Amitoj Kaur Chawla <amitoj1606@...il.com>,
	outreachy-kernel@...glegroups.com
CC:	y2038@...ts.linaro.org, openipmi-developer@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] char: ipmi: ipmi_ssif: Replace timeval with timespec64

Queued for 4.4.  Thanks.

-corey

On 10/23/2015 02:51 PM, Amitoj Kaur Chawla wrote:
> This patch replaces timeval with timespec64 as 32 bit 'struct timeval'
> will not give current time beyond 2038.
>
> The patch changes the code to use ktime_get_real_ts64() which returns
> a 'struct timespec64' instead of do_gettimeofday() which returns a
> 'struct timeval'
>
> This patch also alters the format string in pr_info() for now.tv_sec
> to incorporate 'long long' on 32 bit architectures.
>
> Signed-off-by: Amitoj Kaur Chawla <amitoj1606@...il.com>
> ---
> Changes in v2:
>         -Removed unnecessary format string change in pr_info()
>
>  drivers/char/ipmi/ipmi_ssif.c | 9 +++++----
>  1 file changed, 5 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/char/ipmi/ipmi_ssif.c b/drivers/char/ipmi/ipmi_ssif.c
> index 877205d..90e6246 100644
> --- a/drivers/char/ipmi/ipmi_ssif.c
> +++ b/drivers/char/ipmi/ipmi_ssif.c
> @@ -52,6 +52,7 @@
>  #include <linux/kthread.h>
>  #include <linux/acpi.h>
>  #include <linux/ctype.h>
> +#include <linux/time64.h>
>  
>  #define PFX "ipmi_ssif: "
>  #define DEVICE_NAME "ipmi_ssif"
> @@ -1041,12 +1042,12 @@ static void sender(void                *send_info,
>  	start_next_msg(ssif_info, flags);
>  
>  	if (ssif_info->ssif_debug & SSIF_DEBUG_TIMING) {
> -		struct timeval t;
> +		struct timespec64 t;
>  
> -		do_gettimeofday(&t);
> -		pr_info("**Enqueue %02x %02x: %ld.%6.6ld\n",
> +		ktime_get_real_ts64(&t);
> +		pr_info("**Enqueue %02x %02x: %lld.%6.6ld\n",
>  		       msg->data[0], msg->data[1],
> -		       (long) t.tv_sec, (long) t.tv_usec);
> +		       (long long) t.tv_sec, (long) t.tv_nsec / NSEC_PER_USEC);
>  	}
>  }
>  

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