On Thu, Oct 09, 2008 at 10:52:52AM +0200, Peter Zijlstra wrote:
quoted text
> On Thu, 2008-10-09 at 00:05 -0400, Theodore Ts'o wrote:
> > From: Mingming Cao <cmm@us.ibm.com>
> > 
> > percpu_counter_sum_and_set() and percpu_counter_sum() is the same except
> > the former updates the global counter after accounting.  Since we are
> > taking the fbc->lock to calculate the precise value of the counter in
> > percpu_counter_sum() anyway, it should simply set fbc->count too, as the
> > percpu_counter_sum_and_set() does.
> > 
> > This patch merge these two interfaces into one.
> 
> I totally missed the patch introducing this _and_set() horror, but this
> does look like a good cleanup.

Note: this patch was in the -mm tree (Andrew signed off on it), but
given that a number of ext4 patches depend on it, we have a copy of it
in the ext4 tree.

						- Ted
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