sh: Add support for memory hot-remove.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/mm/Kconfig b/arch/sh/mm/Kconfig
index 8a03926..f8e6dc5 100644
--- a/arch/sh/mm/Kconfig
+++ b/arch/sh/mm/Kconfig
@@ -134,6 +134,10 @@
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
diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c
index b75a7ac..d4681a5 100644
--- a/arch/sh/mm/init.c
+++ b/arch/sh/mm/init.c
@@ -292,4 +292,21 @@
}
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 */