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authorYasunori Goto <y-goto@jp.fujitsu.com>2006-06-27 13:53:31 +0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-28 04:32:36 +0400
commit1e3590e2e4a38e8390fdac5bda23330bf2801838 (patch)
tree528591e9db601af913756b11d37e451202584cd2 /drivers/acpi/numa.c
parentbc02af93dd2bbddce1b55e0a493f833a1b7cf140 (diff)
downloadlinux-1e3590e2e4a38e8390fdac5bda23330bf2801838.tar.xz
[PATCH] pgdat allocation for new node add (get node id by acpi)
This is to find node id from acpi's handle of memory_device in DSDT. _PXM for the new node can be found by acpi_get_pxm() by using new memory's handle. So, node id can be found by pxm_to_nid_map[]. This patch becomes simpler than v2 of node hot-add patch. Because old add_memory() function doesn't have node id parameter. So, kernel must find its handle by physical address via DSDT again. But, v3 just give node id to add_memory() now. Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com> Cc: Dave Hansen <haveblue@us.ibm.com> Cc: "Brown, Len" <len.brown@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/acpi/numa.c')
-rw-r--r--drivers/acpi/numa.c15
1 files changed, 14 insertions, 1 deletions
diff --git a/drivers/acpi/numa.c b/drivers/acpi/numa.c
index e2c1a16078c9..13d6d5bdea26 100644
--- a/drivers/acpi/numa.c
+++ b/drivers/acpi/numa.c
@@ -254,5 +254,18 @@ int acpi_get_pxm(acpi_handle h)
} while (ACPI_SUCCESS(status));
return -1;
}
-
EXPORT_SYMBOL(acpi_get_pxm);
+
+int acpi_get_node(acpi_handle *handle)
+{
+ int pxm, node = -1;
+
+ ACPI_FUNCTION_TRACE("acpi_get_node");
+
+ pxm = acpi_get_pxm(handle);
+ if (pxm >= 0)
+ node = acpi_map_pxm_to_node(pxm);
+
+ return_VALUE(node);
+}
+EXPORT_SYMBOL(acpi_get_node);