From a16037c8dfc2734c1a2c8e3ffd4766ed25f2a41d Mon Sep 17 00:00:00 2001
From: Tejun Heo <tj@kernel.org>
Date: Tue, 2 Sep 2014 14:46:02 -0400
Subject: [PATCH] percpu: make pcpu_alloc_area() capable of allocating only
 from populated areas

Update pcpu_alloc_area() so that it can skip unpopulated areas if the
new parameter @pop_only is true.  This is implemented by a new
function, pcpu_fit_in_area(), which determines the amount of head
padding considering the alignment and populated state.

@pop_only is currently always false but this will be used to implement
atomic allocation.

Signed-off-by: Tejun Heo <tj@kernel.org>
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