Re: (*(unsigned long *)&jiffies)++;

Petko Manolov (petkan@spct.net)
Thu, 06 Jan 2000 15:13:36 +0000

Tigran Aivazian wrote:
>
> Hi,
>
> Why does do_timer() do:
>
> (*(unsigned long *)&jiffies)++;
>
> why not just jiffies++; ? It works fine with jiffies++ but I assume there
> is a reason...

GCC optimize(reorder) "jiffies++" and "(*(unsigned long *)&jiffies)++"
is
used to be sure jiffies is incremented exactly where/when you want.

Petkan

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