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| author |   Wei Yang <weiyang@linux.vnet.ibm.com> | 2012-04-26 15:32:55 +0800 |
|---|---|---|
| committer |   Bjorn Helgaas <bhelgaas@google.com> | 2012-05-07 10:58:57 -0600 |
| commit | 74d24b219bc4ebb20b75d63af2bb577bc1b10b5e (patch) | |
| tree | d6653a2d125e0bbde0c14aa17c54dcfe8c944f34 /include/linux/ioport.h | |
| parent | PCI: fix uninitialized variable 'cap_mask' (diff) | |
| download | linux-dev-74d24b219bc4ebb20b75d63af2bb577bc1b10b5e.tar.xz linux-dev-74d24b219bc4ebb20b75d63af2bb577bc1b10b5e.zip | |
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/linux/ioport.h')
| -rw-r--r-- | include/linux/ioport.h | 7 |
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 */ |