From 9da0763bdd82572be243fcf5161734f11568960f Mon Sep 17 00:00:00 2001
From: Michal Marek <mmarek@suse.cz>
Date: Fri, 25 Apr 2014 23:25:18 +0200
Subject: [PATCH] kbuild: Use relative path when building in a subdir of the
 source tree

When doing make O=<subdir>, use '..' to refer to the source tree. This
allows for more readable compiler messages, and, more importantly, it
sets the VPATH to '..', so filenames in WARN_ON() etc. will be shorter.

Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Michal Marek <mmarek@suse.cz>
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