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While checking the GPU error status, userspace polls on the error notifier 'status' and then verifies 'status' and 'info32'. nvgpu sets 'info32' before 'status', so put a write barrier between those two writes for the consistency between userspace and kernel view of the error notifier state. JIRA NVGPU-7538 Bug 200717195 Bug 3250920 Change-Id: I92ac0589283fee823f3366ac594d03b8f27f3590 Signed-off-by: Sagar Kamble <skamble@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2680320 Reviewed-by: Konsta Holtta <kholtta@nvidia.com> Reviewed-by: Alex Waterman <alexw@nvidia.com>