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Date:   Mon, 20 Apr 2020 01:30:46 -0700
From:   Christoph Hellwig <hch@infradead.org>
To:     Daniel Xu <dxu@dxuuu.xyz>
Cc:     linux-kernel@vger.kernel.org, bpf@vger.kernel.org,
        kernel-team@fb.com, jolsa@kernel.org, brendan.d.gregg@gmail.com,
        andrii.nakryiko@gmail.com, ast@kernel.org
Subject: Re: [RFC] uapi: Convert stat.h #define flags to enums
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And that breaks every userspace program using ifdef to check if a
symbolic name has been defined.