On Fri 19-03-21 10:26:32, Oscar Salvador wrote: > Let the caller check whether it can pass MHP_MEMMAP_ON_MEMORY by > checking mhp_supports_memmap_on_memory(). > MHP_MEMMAP_ON_MEMORY can only be set in case > ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE is enabled, the architecture supports > altmap, and the range to be added spans a single memory block. > > Signed-off-by: Oscar Salvador <osalvador@xxxxxxx> > Reviewed-by: David Hildenbrand <david@xxxxxxxxxx> Acked-by: Michal Hocko <mhocko@xxxxxxxx> > --- > drivers/acpi/acpi_memhotplug.c | 5 ++++- > 1 file changed, 4 insertions(+), 1 deletion(-) > > diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c > index b02fd51e5589..8cc195c4c861 100644 > --- a/drivers/acpi/acpi_memhotplug.c > +++ b/drivers/acpi/acpi_memhotplug.c > @@ -171,6 +171,7 @@ static int acpi_memory_enable_device(struct acpi_memory_device *mem_device) > acpi_handle handle = mem_device->device->handle; > int result, num_enabled = 0; > struct acpi_memory_info *info; > + mhp_t mhp_flags = MHP_NONE; > int node; > > node = acpi_get_node(handle); > @@ -194,8 +195,10 @@ static int acpi_memory_enable_device(struct acpi_memory_device *mem_device) > if (node < 0) > node = memory_add_physaddr_to_nid(info->start_addr); > > + if (mhp_supports_memmap_on_memory(info->length)) > + mhp_flags |= MHP_MEMMAP_ON_MEMORY; > result = __add_memory(node, info->start_addr, info->length, > - MHP_NONE); > + mhp_flags); > > /* > * If the memory block has been used by the kernel, add_memory() > -- > 2.16.3 -- Michal Hocko SUSE Labs
