Commit dccacf8d authored Apr 06, 2020 by David Hildenbrand Committed by Linus Torvalds Apr 07, 2020

mm/page_ext.c: drop pfn_present() check when onlining



Since commit c5e79ef5 ("mm/memory_hotplug.c: don't allow to
online/offline memory blocks with holes") we disallow to offline any
memory with holes.  As all boot memory is online and hotplugged memory
cannot contain holes, we never online memory with holes.

This present check can be dropped.

Signed-off-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Pavel Tatashin <pasha.tatashin@soleen.com>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Link: http://lkml.kernel.org/r/20200127110424.5757-4-david@redhat.com


Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent fada9ae3

mm/page_ext.c

+1 −4

Original line number	Diff line number	Diff line
		@@ -303,11 +303,8 @@ static int __meminit online_page_ext(unsigned long start_pfn,
		VM_BUG_ON(!node_state(nid, N_ONLINE));
		}

		for (pfn = start; !fail && pfn < end; pfn += PAGES_PER_SECTION) {
		if (!pfn_in_present_section(pfn))
		continue;
		for (pfn = start; !fail && pfn < end; pfn += PAGES_PER_SECTION)
		fail = init_section_page_ext(pfn, nid);
		}
		if (!fail)
		return 0;

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