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| author | Paul Mundt <lethal@linux-sh.org> | 2007-06-07 04:32:52 +0200 |
|---|---|---|
| committer | Paul Mundt <lethal@hera.kernel.org> | 2007-06-08 04:43:51 +0200 |
| commit | 33d63bd83bf9aa6b662a376a96b825acba721e8f (patch) | |
| tree | 469eadf218a6e435b06eb151c88340c0adb7b83e | |
| parent | sh: Fix up cpu to node mapping in sysfs. (diff) | |
| download | linux-33d63bd83bf9aa6b662a376a96b825acba721e8f.tar.xz linux-33d63bd83bf9aa6b662a376a96b825acba721e8f.zip | |
sh: memory hot-add for sparsemem users support.
This enables simple hotplug support for sparsemem users. Presently
this only permits memory being added in to node 0 on ZONE_NORMAL.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| -rw-r--r-- | arch/sh/mm/Kconfig | 8 | ||||
| -rw-r--r-- | arch/sh/mm/init.c | 42 | ||||
| -rw-r--r-- | mm/Kconfig | 2 |
3 files changed, 51 insertions, 1 deletions
diff --git a/arch/sh/mm/Kconfig b/arch/sh/mm/Kconfig index c713d13fcca9..0c24abdd4ea1 100644 --- a/arch/sh/mm/Kconfig +++ b/arch/sh/mm/Kconfig @@ -331,6 +331,14 @@ config ARCH_POPULATES_NODE_MAP config ARCH_SELECT_MEMORY_MODEL def_bool y +config ARCH_ENABLE_MEMORY_HOTPLUG + def_bool y + depends on SPARSEMEM + +config ARCH_MEMORY_PROBE + def_bool y + depends on MEMORY_HOTPLUG + choice prompt "Kernel page size" default PAGE_SIZE_4KB diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c index 753e11d5e620..40d4e798e7fb 100644 --- a/arch/sh/mm/init.c +++ b/arch/sh/mm/init.c @@ -265,3 +265,45 @@ void free_initrd_mem(unsigned long start, unsigned long end) printk("Freeing initrd memory: %ldk freed\n", (end - start) >> 10); } #endif + +#ifdef CONFIG_MEMORY_HOTPLUG +void online_page(struct page *page) +{ + ClearPageReserved(page); + init_page_count(page); + __free_page(page); + totalram_pages++; + num_physpages++; +} + +int arch_add_memory(int nid, u64 start, u64 size) +{ + pg_data_t *pgdat; + unsigned long start_pfn = start >> PAGE_SHIFT; + unsigned long nr_pages = size >> PAGE_SHIFT; + int ret; + + pgdat = NODE_DATA(nid); + + /* We only have ZONE_NORMAL, so this is easy.. */ + ret = __add_pages(pgdat->node_zones + ZONE_NORMAL, start_pfn, nr_pages); + if (unlikely(ret)) + printk("%s: Failed, __add_pages() == %d\n", __FUNCTION__, ret); + + return ret; +} +EXPORT_SYMBOL_GPL(arch_add_memory); + +int remove_memory(u64 start, u64 size) +{ + return -EINVAL; +} +EXPORT_SYMBOL_GPL(remove_memory); + +int memory_add_physaddr_to_nid(u64 addr) +{ + /* Node 0 for now.. */ + return 0; +} +EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid); +#endif diff --git a/mm/Kconfig b/mm/Kconfig index 8ac412b45f18..62e5d0d0bd5a 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -117,7 +117,7 @@ config MEMORY_HOTPLUG bool "Allow for memory hot-add" depends on SPARSEMEM || X86_64_ACPI_NUMA depends on HOTPLUG && !SOFTWARE_SUSPEND && ARCH_ENABLE_MEMORY_HOTPLUG - depends on (IA64 || X86 || PPC64) + depends on (IA64 || X86 || PPC64 || SUPERH) comment "Memory hotplug is currently incompatible with Software Suspend" depends on SPARSEMEM && HOTPLUG && SOFTWARE_SUSPEND |