| Message ID | 20200709020629.91671-2-justin.he@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Fix and enable pmem as RAM device on arm64 | expand |
On 09.07.20 04:06, Jia He wrote: > This is to introduce a general dummy helper. memory_add_physaddr_to_nid() > is a fallback option to get the nid in case NUMA_NO_NID is detected. > > After this patch, arm64/sh/s390 can simply use the general dummy version. > PowerPC/x86/ia64 will still use their specific version. > > Signed-off-by: Jia He <justin.he@arm.com> > --- > mm/memory_hotplug.c | 10 ++++++++++ > 1 file changed, 10 insertions(+) > > diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c > index da374cd3d45b..b49ab743d914 100644 > --- a/mm/memory_hotplug.c > +++ b/mm/memory_hotplug.c > @@ -350,6 +350,16 @@ int __ref __add_pages(int nid, unsigned long pfn, unsigned long nr_pages, > return err; > } > > +#ifdef CONFIG_NUMA > +int __weak memory_add_physaddr_to_nid(u64 start) > +{ > + pr_info_once("Unknown target node for memory at 0x%llx, assuming node 0\n", > + start); > + return 0; > +} > +EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid); > +#endif > + > /* find the smallest valid pfn in the range [start_pfn, end_pfn) */ > static unsigned long find_smallest_section_pfn(int nid, struct zone *zone, > unsigned long start_pfn, > Reviewed-by: David Hildenbrand <david@redhat.com>
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index da374cd3d45b..b49ab743d914 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -350,6 +350,16 @@ int __ref __add_pages(int nid, unsigned long pfn, unsigned long nr_pages, return err; } +#ifdef CONFIG_NUMA +int __weak memory_add_physaddr_to_nid(u64 start) +{ + pr_info_once("Unknown target node for memory at 0x%llx, assuming node 0\n", + start); + return 0; +} +EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid); +#endif + /* find the smallest valid pfn in the range [start_pfn, end_pfn) */ static unsigned long find_smallest_section_pfn(int nid, struct zone *zone, unsigned long start_pfn,
This is to introduce a general dummy helper. memory_add_physaddr_to_nid() is a fallback option to get the nid in case NUMA_NO_NID is detected. After this patch, arm64/sh/s390 can simply use the general dummy version. PowerPC/x86/ia64 will still use their specific version. Signed-off-by: Jia He <justin.he@arm.com> --- mm/memory_hotplug.c | 10 ++++++++++ 1 file changed, 10 insertions(+)