From: Paul Mundt Date: Thu, 14 Jun 2007 06:13:16 +0000 (+0900) Subject: mm: Fix memory/cpu hotplug section mismatch and oops. X-Git-Tag: firefly_0821_release~28693 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=d09c6b809432668371b5de9102f4f9aa6a7c79cc;p=firefly-linux-kernel-4.4.55.git mm: Fix memory/cpu hotplug section mismatch and oops. When building with memory hotplug enabled and cpu hotplug disabled, we end up with the following section mismatch: WARNING: mm/built-in.o(.text+0x4e58): Section mismatch: reference to .init.text: (between 'free_area_init_node' and '__build_all_zonelists') This happens as a result of: -> free_area_init_node() -> free_area_init_core() -> zone_pcp_init() <-- all __meminit up to this point -> zone_batchsize() <-- marked as __cpuinit fo This happens because CONFIG_HOTPLUG_CPU=n sets __cpuinit to __init, but CONFIG_MEMORY_HOTPLUG=y unsets __meminit. Changing zone_batchsize() to __devinit fixes this. __devinit is the only thing that is common between CONFIG_HOTPLUG_CPU=y and CONFIG_MEMORY_HOTPLUG=y. In the long run, perhaps this should be moved to another section identifier completely. Without this, memory hot-add of offline nodes (via hotadd_new_pgdat()) will oops if CPU hotplug is not also enabled. Signed-off-by: Paul Mundt Acked-by: Yasunori Goto Signed-off-by: Linus Torvalds -- mm/page_alloc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- diff --git a/mm/page_alloc.c b/mm/page_alloc.c index bd8e33582d25..05ace44852eb 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -1968,7 +1968,7 @@ void zone_init_free_lists(struct pglist_data *pgdat, struct zone *zone, memmap_init_zone((size), (nid), (zone), (start_pfn), MEMMAP_EARLY) #endif -static int __cpuinit zone_batchsize(struct zone *zone) +static int __devinit zone_batchsize(struct zone *zone) { int batch;