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Date: Wed, 18 Oct 2017 00:15:31 -0700
From: Christoph Hellwig <hch@infradead.org>
To: Sami Kerola <kerolasa@iki.fi>
Cc: util-linux@vger.kernel.org
Subject: Re: [PATCH] libuuid: use explicit_bzero() in uuid_clear() when
 possible
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On Mon, Oct 16, 2017 at 10:37:34PM +0100, Sami Kerola wrote:
> This ensures value is blanked.  It is possible compiler optimization removed
> earlier uuid_clear() calls as unnecessary if value was not used after clear.

Can you explain the logic behind this a bit more?  If no one uses the
uuid later it doesn't matter if we cleared it or not.