include/linux/memory_hotplug.h has the following declarations: extern int zone_grow_free_lists(struct zone *zone, unsigned long new_nr_pages); extern int zone_grow_waitqueues(struct zone *zone, unsigned long nr_pages); extern int add_one_highpage(struct page *page, int pfn, int bad_ppro); These declarations were added by the following commit: commit 3947be1969a9ce455ec30f60ef51efb10e4323d1 Author: Dave Hansen <haveblue@xxxxxxxxxx> Date: Sat Oct 29 18:16:54 2005 -0700 [PATCH] memory hotplug: sysfs and add/remove functions It seems that zone_grow_free_lists() and zone_grow_waitqueues() were never used, and add_one_highpage() was always declared as static in arch/i386/mm/init.c and later on in arch/x86/mm/init_32.c, and was later removed in: commit 5e7ccf8635c93b493f7d378a57ce300fbe1484e8 Author: Jiang Liu <liuj97@xxxxxxxxx> Date: Mon Apr 29 15:07:12 2013 -0700 mm/x86: use free_highmem_page() to free highmem pages into buddy system So remove these declarations. Signed-off-by: Oscar Salvador <osalvador@xxxxxxx> --- include/linux/memory_hotplug.h | 3 --- 1 file changed, 3 deletions(-) diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h index 0d837ce6ec11..9a19e97d4f1a 100644 --- a/include/linux/memory_hotplug.h +++ b/include/linux/memory_hotplug.h @@ -80,9 +80,6 @@ struct range mhp_get_pluggable_range(bool need_mapping); /* * Zone resizing functions */ -extern int zone_grow_free_lists(struct zone *zone, unsigned long new_nr_pages); -extern int zone_grow_waitqueues(struct zone *zone, unsigned long nr_pages); -extern int add_one_highpage(struct page *page, int pfn, int bad_ppro); extern void adjust_present_page_count(struct zone *zone, long nr_pages); /* VM interface that may be used by firmware interface */ extern int mhp_init_memmap_on_memory(unsigned long pfn, unsigned long nr_pages, -- 2.16.3