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由 Chris Wilson 提交于
Be consistent, and even when we know we had used a WC, flush the mapped object after writing into it. The flush understands the mapping type and will only clflush if !I915_MAP_WC, but will always insert a wmb [sfence] so that we can be sure that all writes are visible. v2: Add the unconditional wmb so we are know that we always flush the writes to memory/HW at that point. Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk> Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com> Reviewed-by: NMika Kuoppala <mika.kuoppala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200511141304.599-1-chris@chris-wilson.co.uk
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