From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jesse Brandeburg Date: Tue, 21 Nov 2017 09:40:14 -0800 Subject: [Intel-wired-lan] [PATCH v2 7/7] i40evf: Use smp_rmb rather than read_barrier_depends In-Reply-To: <1510938349-17608-8-git-send-email-brking@linux.vnet.ibm.com> References: <1510938349-17608-1-git-send-email-brking@linux.vnet.ibm.com> <1510938349-17608-8-git-send-email-brking@linux.vnet.ibm.com> Message-ID: <20171121094014.000057af@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: intel-wired-lan@osuosl.org List-ID: On Fri, 17 Nov 2017 11:05:49 -0600 Brian King wrote: > The original issue being fixed in this patch was seen with the ixgbe > driver, but the same issue exists with i40evf as well, as the code is > very similar. read_barrier_depends is not sufficient to ensure > loads following it are not speculatively loaded out of order > by the CPU, which can result in stale data being loaded, causing > potential system crashes. Acked-by: Jesse Brandeburg