Date: Wed, 3 Jun 2015 22:32:28 +0200 From: Joerg Sonnenberger <joerg@britannica.bec.de> To: freebsd-hackers@freebsd.org Subject: Re: [PATCH] timecounters: Fix timehand generation read/write Message-ID: <20150603203228.GA9774@britannica.bec.de> In-Reply-To: <1433331966-27548-1-git-send-email-sebastian.huber@embedded-brains.de> References: <1433331966-27548-1-git-send-email-sebastian.huber@embedded-brains.de>
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On Wed, Jun 03, 2015 at 01:46:06PM +0200, Sebastian Huber wrote: > The compiler is free to re-order load/store instructions to non-volatile > variables around a load/store of a volatile variable. This part is wrong. The *compiler* is not free to do such reorder. The CPU may, as it doesn't really care about volatile. Joerg
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