Dan Williams <dan.j.willi...@intel.com> writes: > The pmem driver on PowerPC crashes with the following signature when > instantiating misaligned namespaces that map their capacity via > memremap_pages(). > > BUG: Unable to handle kernel data access at 0xc001000406000000 > Faulting instruction address: 0xc000000000090790 > NIP [c000000000090790] arch_add_memory+0xc0/0x130 > LR [c000000000090744] arch_add_memory+0x74/0x130 > Call Trace: > arch_add_memory+0x74/0x130 (unreliable) > memremap_pages+0x74c/0xa30 > devm_memremap_pages+0x3c/0xa0 > pmem_attach_disk+0x188/0x770 > nvdimm_bus_probe+0xd8/0x470 > > With the assumption that only memremap_pages() has alignment > constraints, enforce memremap_compat_align() for > pmem_should_map_pages(), nd_pfn, or nd_dax cases. > > Reported-by: Aneesh Kumar K.V <aneesh.ku...@linux.ibm.com> > Cc: Jeff Moyer <jmo...@redhat.com> > Reviewed-by: Aneesh Kumar K.V <aneesh.ku...@linux.ibm.com> > Link: > https://lore.kernel.org/r/158041477336.3889308.4581652885008605170.st...@dwillia2-desk3.amr.corp.intel.com > Signed-off-by: Dan Williams <dan.j.willi...@intel.com>
Reviewed-by: Jeff Moyer <jmo...@redhat.com>
