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Commit 3159e7d6 authored by Paul Mundt's avatar Paul Mundt
Browse files

sh: Add support for memory hot-remove. 



Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent 5840263e

arch/sh/mm/Kconfig

+4 −0
Original line number Diff line number Diff line
@@ -134,6 +134,10 @@ config ARCH_ENABLE_MEMORY_HOTPLUG 
	def_bool y

	depends on SPARSEMEM



config ARCH_ENABLE_MEMORY_HOTREMOVE

	def_bool y

	depends on SPARSEMEM



config ARCH_MEMORY_PROBE

	def_bool y

	depends on MEMORY_HOTPLUG

arch/sh/mm/init.c

+17 −0
Original line number Diff line number Diff line
@@ -292,4 +292,21 @@ int memory_add_physaddr_to_nid(u64 addr) 
}

EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid);

#endif



#ifdef CONFIG_MEMORY_HOTREMOVE

int remove_memory(u64 start, u64 size)

{

	unsigned long start_pfn = start >> PAGE_SHIFT;

	unsigned long end_pfn = start_pfn + (size >> PAGE_SHIFT);

	int ret;



	ret = offline_pages(start_pfn, end_pfn, 120 * HZ);

	if (unlikely(ret))

		printk("%s: Failed, offline_pages() == %d\n", __func__, ret);



	return ret;

}

EXPORT_SYMBOL_GPL(remove_memory);

#endif



#endif /* CONFIG_MEMORY_HOTPLUG */