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authorWei Yang <weiyang@linux.vnet.ibm.com>2012-04-26 15:32:55 +0800
committerBjorn Helgaas <bhelgaas@google.com>2012-05-07 10:58:57 -0600
commit74d24b219bc4ebb20b75d63af2bb577bc1b10b5e (patch)
treed6653a2d125e0bbde0c14aa17c54dcfe8c944f34 /include
parent1267b3a325f00291e847ea4a001ccabe5d5516f2 (diff)
resources: add resource_overlaps()
Add resource_overlaps(), which returns true if two resources overlap at all. Use this to replace the complicated check in coalesce_windows(). Signed-Off-By: Wei Yang <weiyang@linux.vnet.ibm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'include')
-rw-r--r--include/linux/ioport.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/ioport.h b/include/linux/ioport.h
index e885ba23de70..589e0e75efae 100644
--- a/include/linux/ioport.h
+++ b/include/linux/ioport.h
@@ -223,5 +223,12 @@ extern int
walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages,
void *arg, int (*func)(unsigned long, unsigned long, void *));
+/* True if any part of r1 overlaps r2 */
+static inline bool resource_overlaps(struct resource *r1, struct resource *r2)
+{
+ return (r1->start <= r2->end && r1->end >= r2->start);
+}
+
+
#endif /* __ASSEMBLY__ */
#endif /* _LINUX_IOPORT_H */