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| author | Yasunori Goto <y-goto@jp.fujitsu.com> | 2007-11-14 16:59:20 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-11-14 18:45:39 -0800 |
| commit | 887c3cb18865a4f9e0786e5a5b3ef47ff469b956 (patch) | |
| tree | 553024b7cfb9c06e71aafefc218165ecc015bd10 | |
| parent | 5fce25a9df4865bdd5e3dc4853b269dc1677a02a (diff) | |
| download | linux-887c3cb18865a4f9e0786e5a5b3ef47ff469b956.tar.gz linux-887c3cb18865a4f9e0786e5a5b3ef47ff469b956.tar.bz2 linux-887c3cb18865a4f9e0786e5a5b3ef47ff469b956.zip | |
Add IORESOUCE_BUSY flag for System RAM
i386 and x86-64 registers System RAM as IORESOURCE_MEM | IORESOURCE_BUSY.
But ia64 registers it as IORESOURCE_MEM only.
In addition, memory hotplug code registers new memory as IORESOURCE_MEM too.
This difference causes a failure of memory unplug of x86-64. This patch
fixes it.
This patch adds IORESOURCE_BUSY to avoid potential overlap mapping by PCI
device.
Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com>
Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com>
Cc: Luck, Tony" <tony.luck@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | arch/ia64/kernel/efi.c | 6 | ||||
| -rw-r--r-- | kernel/resource.c | 2 | ||||
| -rw-r--r-- | mm/memory_hotplug.c | 2 |
3 files changed, 4 insertions, 6 deletions
diff --git a/arch/ia64/kernel/efi.c b/arch/ia64/kernel/efi.c index 5181bf551f3c..8e8f8b6193ee 100644 --- a/arch/ia64/kernel/efi.c +++ b/arch/ia64/kernel/efi.c @@ -1113,7 +1113,7 @@ efi_initialize_iomem_resources(struct resource *code_resource, if (md->num_pages == 0) /* should not happen */ continue; - flags = IORESOURCE_MEM; + flags = IORESOURCE_MEM | IORESOURCE_BUSY; switch (md->type) { case EFI_MEMORY_MAPPED_IO: @@ -1135,12 +1135,11 @@ efi_initialize_iomem_resources(struct resource *code_resource, case EFI_ACPI_MEMORY_NVS: name = "ACPI Non-volatile Storage"; - flags |= IORESOURCE_BUSY; break; case EFI_UNUSABLE_MEMORY: name = "reserved"; - flags |= IORESOURCE_BUSY | IORESOURCE_DISABLED; + flags |= IORESOURCE_DISABLED; break; case EFI_RESERVED_TYPE: @@ -1149,7 +1148,6 @@ efi_initialize_iomem_resources(struct resource *code_resource, case EFI_ACPI_RECLAIM_MEMORY: default: name = "reserved"; - flags |= IORESOURCE_BUSY; break; } diff --git a/kernel/resource.c b/kernel/resource.c index a358142ff48f..2eb553d9b517 100644 --- a/kernel/resource.c +++ b/kernel/resource.c @@ -277,7 +277,7 @@ walk_memory_resource(unsigned long start_pfn, unsigned long nr_pages, void *arg, int ret = -1; res.start = (u64) start_pfn << PAGE_SHIFT; res.end = ((u64)(start_pfn + nr_pages) << PAGE_SHIFT) - 1; - res.flags = IORESOURCE_MEM; + res.flags = IORESOURCE_MEM | IORESOURCE_BUSY; orig_end = res.end; while ((res.start < res.end) && (find_next_system_ram(&res) >= 0)) { pfn = (unsigned long)(res.start >> PAGE_SHIFT); diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index 987abe6375ed..9512a544d044 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -39,7 +39,7 @@ static struct resource *register_memory_resource(u64 start, u64 size) res->name = "System RAM"; res->start = start; res->end = start + size - 1; - res->flags = IORESOURCE_MEM; + res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; if (request_resource(&iomem_resource, res) < 0) { printk("System RAM resource %llx - %llx cannot be added\n", (unsigned long long)res->start, (unsigned long long)res->end); |