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| author |   Paul Mundt <lethal@linux-sh.org> | 2008-09-05 15:39:12 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2008-09-08 10:35:04 +0900 |
| commit | 3159e7d62ad13f71ef3fe029c145594d8caa580d (patch) | |
| tree | a05b4b03232480db57fac798a72289f9dfdeeb19 /arch/sh/mm | |
| parent | sh: Don't enable clockevents broadcasting on UP SH-X3 builds. (diff) | |
| download | linux-dev-3159e7d62ad13f71ef3fe029c145594d8caa580d.tar.xz linux-dev-3159e7d62ad13f71ef3fe029c145594d8caa580d.zip | |
sh: Add support for memory hot-remove.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/mm')
| -rw-r--r-- | arch/sh/mm/Kconfig | 4 | ||||
| -rw-r--r-- | arch/sh/mm/init.c | 17 |
2 files changed, 21 insertions, 0 deletions
diff --git a/arch/sh/mm/Kconfig b/arch/sh/mm/Kconfig index 8a03926ea84f..f8e6dc5e056f 100644 --- a/arch/sh/mm/Kconfig +++ b/arch/sh/mm/Kconfig @@ -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 diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c index b75a7acd62fb..d4681a55c852 100644 --- a/arch/sh/mm/init.c +++ b/arch/sh/mm/init.c @@ -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 */ |