Re: [PATCH] simplify update_times (avoid jiffies/jiffies_64aliasing problem)

[Paul Mackerras]

Andrew Morton writes:

> Andi Kleen <ak@xxxxxx> wrote:
> > Yes maybe it would be better to just use  #define there.
> > jiffies_64 always was a bit too clever.
> 
> hm.   It's actually rather hard.

I think the thing that makes most sense is:

#define jiffies	((unsigned long) jiffies_64)

and fix the few drivers that use `jiffies' as a local variable.
No-one should be trying to write to jiffies, and the compiler will do
the right thing for reads of jiffies on 32-bit platforms (it does on
ppc32 at least).

Paul.

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