From: Alexander Duyck <alexander.h.duyck@xxxxxxxxx> Date: Mon, 24 Oct 2016 08:06:07 -0400 > This change allows us to pass DMA_ATTR_SKIP_CPU_SYNC which allows us to > avoid invoking cache line invalidation if the driver will just handle it > via a sync_for_cpu or sync_for_device call. > > Cc: "David S. Miller" <davem@xxxxxxxxxxxxx> > Cc: sparclinux@xxxxxxxxxxxxxxx > Signed-off-by: Alexander Duyck <alexander.h.duyck@xxxxxxxxx> This is fine for avoiding the flush for performance reasons, but the chip isn't going to write anything back unless the device wrote into the area. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>