On Thu, Feb 04, 2021 at 05:20:53PM +0100, Andreas Larsson wrote: > Commit cca079ef8ac29a7c02192d2bad2ffe4c0c5ffdd0 changed sparc32 to use > memblocks instead of bootmem, but also made high memory available via > memblock allocation which does work together with e.g. phys_to_virt and > leads to crashes. > > This changes back to only low memory being allocatable in the early > stages, now using memblock allocation. > > Signed-off-by: Andreas Larsson <andreas@xxxxxxxxxxx> Acked-by: Mike Rapoport <rppt@xxxxxxxxxxxxx> > --- > arch/sparc/mm/init_32.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/arch/sparc/mm/init_32.c b/arch/sparc/mm/init_32.c > index eb2946b1df8a..6139c5700ccc 100644 > --- a/arch/sparc/mm/init_32.c > +++ b/arch/sparc/mm/init_32.c > @@ -197,6 +197,9 @@ unsigned long __init bootmem_init(unsigned long *pages_avail) > size = memblock_phys_mem_size() - memblock_reserved_size(); > *pages_avail = (size >> PAGE_SHIFT) - high_pages; > > + /* Only allow low memory to be allocated via memblock allocation */ > + memblock_set_current_limit(max_low_pfn << PAGE_SHIFT); > + > return max_pfn; > } > > -- > 2.17.1 > -- Sincerely yours, Mike.
