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authorChristoph Hellwig <hch@lst.de>2006-12-06 20:32:33 -0800
committerLinus Torvalds <torvalds@woody.osdl.org>2006-12-07 08:39:22 -0800
commit873481367edb18a7d0d7e5a285e6728c16bb44a9 (patch)
treedd97507a3c061addac715bb07bfd5c4991e08f80 /include
parent8b98c1699eba23cfd2e8b366625c50ff5fd1415b (diff)
downloadop-kernel-dev-873481367edb18a7d0d7e5a285e6728c16bb44a9.zip
op-kernel-dev-873481367edb18a7d0d7e5a285e6728c16bb44a9.tar.gz
[PATCH] add numa node information to struct device
For node-aware skb allocations we need information about the node in struct net_device or struct device. Davem suggested to put it into struct device which this patch does. In particular: - struct device gets a new int numa_node member if CONFIG_NUMA is set - there are two new helpers, dev_to_node and set_dev_node to transparently deal with the non-numa case - for pci devices the node-info is set to the value we get from pcibus_to_node. Note that for some architectures pcibus_to_node doesn't work yet at the time we call it currently. This is harmless and will just mean skb allocations aren't node-local on this architectures until the implementation of pcibus_to_node on these architectures have been updated (There are patches for x86 and x86_64 floating around) [akpm@osdl.org: cleanup] Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Christoph Lameter <clameter@engr.sgi.com> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/device.h22
1 files changed, 22 insertions, 0 deletions
diff --git a/include/linux/device.h b/include/linux/device.h
index 583a341..49ab53c 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -371,6 +371,9 @@ struct device {
core doesn't touch it */
struct dev_pm_info power;
+#ifdef CONFIG_NUMA
+ int numa_node; /* NUMA node this device is close to */
+#endif
u64 *dma_mask; /* dma mask (if dma'able device) */
u64 coherent_dma_mask;/* Like dma_mask, but for
alloc_coherent mappings as
@@ -394,6 +397,25 @@ struct device {
void (*release)(struct device * dev);
};
+#ifdef CONFIG_NUMA
+static inline int dev_to_node(struct device *dev)
+{
+ return dev->numa_node;
+}
+static inline void set_dev_node(struct device *dev, int node)
+{
+ dev->numa_node = node;
+}
+#else
+static inline int dev_to_node(struct device *dev)
+{
+ return -1;
+}
+static inline void set_dev_node(struct device *dev, int node)
+{
+}
+#endif
+
static inline void *
dev_get_drvdata (struct device *dev)
{
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