linux-kernel - Re: [PATCH AUTOSEL 5.15 13/24] tools: Fix math.h breakage

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Date:   Mon, 6 Dec 2021 21:19:46 +0000
From:   Matthew Wilcox <willy@...radead.org>
To:     Sasha Levin <sashal@...nel.org>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH AUTOSEL 5.15 13/24] tools: Fix math.h breakage

On Mon, Dec 06, 2021 at 04:12:18PM -0500, Sasha Levin wrote:
> From: "Matthew Wilcox (Oracle)" <willy@...radead.org>
> 
> [ Upstream commit d6e6a27d960f9f07aef0b979c49c6736ede28f75 ]
> 
> Commit 98e1385ef24b ("include/linux/radix-tree.h: replace kernel.h with
> the necessary inclusions") broke the radix tree test suite in two
> different ways; first by including math.h which didn't exist in the
> tools directory, and second by removing an implicit include of
> spinlock.h before lockdep.h.  Fix both issues.

I'm confused.  Was 98e1385ef24b backported to v5.15?  I don't see it
in linux-5.15.y, and I don't know why it would be considered a stable
backport candidate.  If not, why would this patch be needed?