I meet the same problem on Loongson-3, and this patch resolve my problem. Thanks. Tested-by: Huacai Chen <chenhc@xxxxxxxxxx> On Tue, Oct 28, 2014 at 7:28 PM, Zubair Lutfullah Kakakhel <Zubair.Kakakhel@xxxxxxxxxx> wrote: > Even if CMA is disabled, the for_each_memblock macro expands > to run reserve_bootmem once. Hence, reserve_bootmem attempts to > reserve location 0 of size 0. > > Add a check to avoid that. > > Issue was highlighted during testing with EVA enabled. > resrve_bootmem used to exit gracefully when passed arguments to > reserve 0 size location at 0 without EVA. > > But with EVA enabled, macros would point to different addresses > and the code would trigger a BUG. > > Signed-off-by: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@xxxxxxxxxx> > Tested-by: Markos Chandras <markos.chandras@xxxxxxxxxx> > --- > arch/mips/kernel/setup.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c > index 938f157..eacfd7d 100644 > --- a/arch/mips/kernel/setup.c > +++ b/arch/mips/kernel/setup.c > @@ -683,7 +683,8 @@ static void __init arch_mem_init(char **cmdline_p) > dma_contiguous_reserve(PFN_PHYS(max_low_pfn)); > /* Tell bootmem about cma reserved memblock section */ > for_each_memblock(reserved, reg) > - reserve_bootmem(reg->base, reg->size, BOOTMEM_DEFAULT); > + if (reg->size != 0) > + reserve_bootmem(reg->base, reg->size, BOOTMEM_DEFAULT); > } > > static void __init resource_init(void) > -- > 1.9.1 > >
