From 887c3cb18865a4f9e0786e5a5b3ef47ff469b956 Mon Sep 17 00:00:00 2001 From: Yasunori Goto Date: Wed, 14 Nov 2007 16:59:20 -0800 Subject: 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 Signed-off-by: Badari Pulavarty Cc: Luck, Tony" Cc: Thomas Gleixner Cc: Ingo Molnar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- kernel/resource.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'kernel/resource.c') 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); -- cgit v1.2.3-58-ga151