> -Original Message-
> From: Thomas Gleixner [mailto:t...@linutronix.de]
> Sent: Monday, February 01, 2016 4:43 PM
> To: Zengtao (B)
> Cc: Arnd Bergmann; LKML; Frederic Weisbecker
> Subject: RE: [PATCH] cputime: Fix timeval-->cputime conversion
>
> On Mon, 1
On Mon, 1 Feb 2016, Zengtao (B) wrote:
> Hi Arnd:
> I have got a new idea about the problem:
> In include/linux/time64.h
> #define NSEC_PER_SEC 10L
> I think we should change it to
> #define NSEC_PER_SEC 10LL
>
> My reason is :
> 1. when it is used in a multiplication,
t get overflow, the change has no side affect.
Thanks.
Zengtao
> -Original Message-
> From: Zengtao (B)
> Sent: Saturday, January 30, 2016 10:31 AM
> To: 'Arnd Bergmann'
> Cc: Thomas Gleixner; LKML; Frederic Weisbecker
> Subject: RE: [PATCH] cputime:
> -Original Message-
> From: Arnd Bergmann [mailto:a...@arndb.de]
> Sent: Friday, January 29, 2016 4:46 PM
> To: Zengtao (B)
> Cc: Thomas Gleixner; LKML; Frederic Weisbecker
> Subject: Re: [PATCH] cputime: Fix timeval-->cputime conversion
>
> On Friday 29 Ja
On Friday 29 January 2016 03:12:37 Zengtao wrote:
> > -Original Message-
> > From: Arnd Bergmann [mailto:a...@arndb.de]
> > Sent: Thursday, January 28, 2016 7:52 PM
> > To: Thomas Gleixner
> > Cc: Zengtao (B); LKML; Frederic Weisbecker
> > Subje
> -Original Message-
> From: Arnd Bergmann [mailto:a...@arndb.de]
> Sent: Thursday, January 28, 2016 7:52 PM
> To: Thomas Gleixner
> Cc: Zengtao (B); LKML; Frederic Weisbecker
> Subject: Re: [PATCH] cputime: Fix timeval-->cputime conversion
>
> On Thursday 28 J
On Thursday 28 January 2016 09:22:04 Thomas Gleixner wrote:
> Cc'ing Arnd
>
> On Thu, 28 Jan 2016, zengtao wrote:
>
> > The structure:
> > struct timeval {
> > __kernel_time_t tv_sec; /* seconds */
> > __kernel_suseconds_ttv_usec;/* microseconds */
> > };
>
Cc'ing Arnd
On Thu, 28 Jan 2016, zengtao wrote:
> The structure:
> struct timeval {
> __kernel_time_t tv_sec; /* seconds */
> __kernel_suseconds_ttv_usec;/* microseconds */
> };
> both __kernel_time_t and __kernel_suseconds_t are short than u64
> when it is
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