Re: [resend PATCH for 3.2] procfs: do not confuse jiffies withcputime64_t

[Andrew Morton]

On Thu, 22 Dec 2011 00:50:06 +0100
Andreas Schwab <schwab@xxxxxxxxxxxxxx> wrote:

> Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> writes:
> 
> > From: Andreas Schwab <schwab@xxxxxxxxxxxxxx>
> > Subject: procfs: do not confuse jiffies with cputime64_t
> >
> > get_{idle,iowait}_time are supposed to return cputime64_t values, not
> > jiffies.  Add usecs_to_cputime64 for this.
> 
> For most architectures (which use the asm-generic/cputime.h) jiffies use
> the same unit as cputime64_t values, but ia64, powerpc and s390 make
> them different.
> 

OK, but

a) what effect does this problem have upon users of the kernel?

b) which kernel version(s) are affected?
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