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sh: Add support for memory hot-remove.

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Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt
2008-09-05 15:39:12 +09:00
parent 5840263ecb
commit 3159e7d62a
2 changed files with 21 additions and 0 deletions
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4
arch/sh/mm/Kconfig
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@@ -134,6 +134,10 @@ config ARCH_ENABLE_MEMORY_HOTPLUG
def_bool y def_bool y
depends on SPARSEMEM depends on SPARSEMEM
config ARCH_ENABLE_MEMORY_HOTREMOVE
def_bool y
depends on SPARSEMEM
config ARCH_MEMORY_PROBE config ARCH_MEMORY_PROBE
def_bool y def_bool y
depends on MEMORY_HOTPLUG depends on MEMORY_HOTPLUG

17
arch/sh/mm/init.c
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@@ -292,4 +292,21 @@ int memory_add_physaddr_to_nid(u64 addr)
} }
EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid); EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid);
#endif #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
#endif /* CONFIG_MEMORY_HOTPLUG */