Re: [PATCH] x86/time: cleanup

[Keir Fraser <keir.xen@gmail.com>]

[-- Attachment #1.1: Type: text/plain, Size: 1625 bytes --]



Jan Beulich wrote:
>
> Eliminate effectively unused variables mistakenly left in place by
> 9539:08aede767c63 ("Rename update_dom_time() to
> update_vcpu_system_time()").
>
> Drop the pointless casts.
>
> Use SECONDS() instead of open coding it.
>
> Signed-off-by: Jan Beulich<jbeulich@suse.com>


Acked-by: Keir Fraser <keir@xen.org>

>
>
> --- a/xen/arch/x86/time.c
> +++ b/xen/arch/x86/time.c
> @@ -921,15 +921,15 @@ int cpu_frequency_change(u64 freq)
> void do_settime(unsigned long secs, unsigned long nsecs, u64 
> system_time_base)
> {
> u64 x;
> - u32 y, _wc_sec, _wc_nsec;
> + u32 y;
> struct domain *d;
>
> - x = (secs * 1000000000ULL) + (u64)nsecs - system_time_base;
> + x = SECONDS(secs) + (u64)nsecs - system_time_base;
> y = do_div(x, 1000000000);
>
> spin_lock(&wc_lock);
> - wc_sec = _wc_sec = (u32)x;
> - wc_nsec = _wc_nsec = (u32)y;
> + wc_sec = x;
> + wc_nsec = y;
> spin_unlock(&wc_lock);
>
> rcu_read_lock(&domlist_read_lock);
> @@ -1548,8 +1548,8 @@ unsigned long get_localtime(struct domai
> /* Return microsecs after 00:00:00 localtime, 1 January, 1970. */
> uint64_t get_localtime_us(struct domain *d)
> {
> - return ((wc_sec + d->time_offset_seconds) * 1000000000ULL
> - + wc_nsec + NOW()) / 1000UL;
> + return (SECONDS(wc_sec + d->time_offset_seconds) + wc_nsec + NOW())
> + / 1000UL;
> }
>
> unsigned long get_sec(void)
> @@ -1651,7 +1651,7 @@ struct tm wallclock_time(void)
> if ( !wc_sec )
> return (struct tm) { 0 };
>
> - seconds = NOW() + (wc_sec * 1000000000ull) + wc_nsec;
> + seconds = NOW() + SECONDS(wc_sec) + wc_nsec;
> do_div(seconds, 1000000000);
> return gmtime(seconds);
> }
>
>

[-- Attachment #1.2: Type: text/html, Size: 2699 bytes --]

[-- Attachment #2: Type: text/plain, Size: 126 bytes --]

_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xen.org
http://lists.xen.org/xen-devel