From: Michal Hocko <mhocko@xxxxxxxx> Subject: mm, memory_hotplug: fix the section mismatch warning Tobias has reported following section mismatches introduced by "mm, memory_hotplug: do not associate hotadded memory to zones until online". WARNING: mm/built-in.o(.text+0x5a1c2): Section mismatch in reference from the function move_pfn_range_to_zone() to the function .meminit.text:memmap_init_zone() The function move_pfn_range_to_zone() references the function __meminit memmap_init_zone(). This is often because move_pfn_range_to_zone lacks a __meminit annotation or the annotation of memmap_init_zone is wrong. WARNING: mm/built-in.o(.text+0x5a25b): Section mismatch in reference from the function move_pfn_range_to_zone() to the function .meminit.text:init_currently_empty_zone() The function move_pfn_range_to_zone() references the function __meminit init_currently_empty_zone(). This is often because move_pfn_range_to_zone lacks a __meminit annotation or the annotation of init_currently_empty_zone is wrong. WARNING: vmlinux.o(.text+0x188aa2): Section mismatch in reference from the function move_pfn_range_to_zone() to the function .meminit.text:memmap_init_zone() The function move_pfn_range_to_zone() references the function __meminit memmap_init_zone(). This is often because move_pfn_range_to_zone lacks a __meminit annotation or the annotation of memmap_init_zone is wrong. WARNING: vmlinux.o(.text+0x188b3b): Section mismatch in reference from the function move_pfn_range_to_zone() to the function .meminit.text:init_currently_empty_zone() The function move_pfn_range_to_zone() references the function __meminit init_currently_empty_zone(). This is often because move_pfn_range_to_zone lacks a __meminit annotation or the annotation of init_currently_empty_zone is wrong. Both memmap_init_zone and init_currently_empty_zone are marked __meminit but move_pfn_range_to_zone is used outside of __meminit sections (e.g. devm_memremap_pages) so we have to hide it from the checker by __ref annotation. Link: http://lkml.kernel.org/r/20170515085827.16474-14-mhocko@xxxxxxxxxx Signed-off-by: Michal Hocko <mhocko@xxxxxxxx> Reported-by: Tobias Regnery <tobias.regnery@xxxxxxxxx> Cc: Andi Kleen <ak@xxxxxxxxxxxxxxx> Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx> Cc: Balbir Singh <bsingharora@xxxxxxxxx> Cc: Dan Williams <dan.j.williams@xxxxxxxxx> Cc: Daniel Kiper <daniel.kiper@xxxxxxxxxx> Cc: David Rientjes <rientjes@xxxxxxxxxx> Cc: Heiko Carstens <heiko.carstens@xxxxxxxxxx> Cc: Igor Mammedov <imammedo@xxxxxxxxxx> Cc: Jerome Glisse <jglisse@xxxxxxxxxx> Cc: Joonsoo Kim <js1304@xxxxxxxxx> Cc: Martin Schwidefsky <schwidefsky@xxxxxxxxxx> Cc: Mel Gorman <mgorman@xxxxxxx> Cc: Reza Arbab <arbab@xxxxxxxxxxxxxxxxxx> Cc: Toshi Kani <toshi.kani@xxxxxxx> Cc: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx> Cc: Vlastimil Babka <vbabka@xxxxxxx> Cc: Xishi Qiu <qiuxishi@xxxxxxxxxx> Cc: Yasuaki Ishimatsu <isimatu.yasuaki@xxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/memory_hotplug.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff -puN mm/memory_hotplug.c~mm-memory_hotplug-fix-the-section-mismatch-warning mm/memory_hotplug.c --- a/mm/memory_hotplug.c~mm-memory_hotplug-fix-the-section-mismatch-warning +++ a/mm/memory_hotplug.c @@ -1071,7 +1071,7 @@ static void __meminit resize_pgdat_range pgdat->node_spanned_pages = max(start_pfn + nr_pages, old_end_pfn) - pgdat->node_start_pfn; } -void move_pfn_range_to_zone(struct zone *zone, +void __ref move_pfn_range_to_zone(struct zone *zone, unsigned long start_pfn, unsigned long nr_pages) { struct pglist_data *pgdat = zone->zone_pgdat; _ -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
