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Date: Fri, 14 Dec 2018 09:06:43 +0100
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Guenter Roeck <linux@roeck-us.net>
Cc: stable <stable@vger.kernel.org>, Sasha Levin <sashal@kernel.org>
Subject: Re: Patches for v4.4.y, v4.9.y, and v4.14.y to address rbtree test
 failures
Message-ID: <20181214080643.GA12329@kroah.com>
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On Thu, Dec 13, 2018 at 09:22:07PM -0800, Guenter Roeck wrote:
> Hi folks,
> 
> I recently started seeing spurious test failures with rbtree tests,
> resulting in boot delays and random "hung task" warnings.
> The problems have been fixed upstream with the following patches.
> 
> v4.14.y:
> 
> 0b548e33e6cb lib/rbtree-test: lower default params
> 
> v4.4.y, v4.9.y:
> 
> a54dae0338b7 lib/interval_tree_test.c: make test options module parameters
> c46ecce431eb lib/interval_tree_test.c: allow full tree search

Wait, this patch breaks the build for 4.4.y and 4.9.y, so this isn't
going to work well:

lib/interval_tree_test.c: In function ‘interval_tree_test_init’:
lib/interval_tree_test.c:105:38: error: ‘max_endpoint’ undeclared (first use in this function); did you mean ‘tracepoint’?
    unsigned long last = search_all ? max_endpoint : queries[j];
                                      ^~~~~~~~~~~~
                                      tracepoint


So I'm going to drop these from the 4.4 and 4.9 and 3.18 trees.  How did they
build for you?

confused,

greg k-h