On Mon, Dec 04, 2017 at 02:13:05PM +0000, Steve Capper wrote: > The high_memory global variable is used by > cma_declare_contiguous(.) before it is defined. > > We don't notice this as we compute __pa(high_memory - 1), and it looks > like we're processing a VA from the direct linear map. > > This problem becomes apparent when we flip the kernel virtual address > space and the linear map is moved to the bottom of the kernel VA space. > > This patch moves the initialisation of high_memory before it used. > > Signed-off-by: Steve Capper <steve.capper@xxxxxxx> It looks like we've had this bug since 3.18 (f7426b983a6a, "mm: cma: adjust address limit to avoid hitting low/high memory boundary"). It may be worth adding a cc stable on this patch. -- Catalin _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
