[PATCH 2/5] resource: add a not device managed request_free_mem_region variant

[Christoph Hellwig]

Just add a simple macro that passes a NULL dev argument to
dev_request_free_mem_region, and call request_mem_region in the
function for that particular case.

Signed-off-by: Christoph Hellwig <h...@lst.de>
---
 include/linux/ioport.h | 2 ++
 kernel/resource.c      | 5 ++++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/include/linux/ioport.h b/include/linux/ioport.h
index 0dcc48cafa80..528ae6cbb1b4 100644
--- a/include/linux/ioport.h
+++ b/include/linux/ioport.h
@@ -297,6 +297,8 @@ static inline bool resource_overlaps(struct resource *r1, 
struct resource *r2)
 
 struct resource *devm_request_free_mem_region(struct device *dev,
                struct resource *base, unsigned long size, const char *name);
+#define request_free_mem_region(base, size, name) \
+       devm_request_free_mem_region(NULL, base, size, name)
 
 #endif /* __ASSEMBLY__ */
 #endif /* _LINUX_IOPORT_H */
diff --git a/kernel/resource.c b/kernel/resource.c
index 0ddc558586a7..3a826b3cc883 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -1671,7 +1671,10 @@ struct resource *devm_request_free_mem_region(struct 
device *dev,
                                REGION_DISJOINT)
                        continue;
 
-               res = devm_request_mem_region(dev, addr, size, name);
+               if (dev)
+                       res = devm_request_mem_region(dev, addr, size, name);
+               else
+                       res = request_mem_region(addr, size, name);
                if (!res)
                        return ERR_PTR(-ENOMEM);
                res->desc = IORES_DESC_DEVICE_PRIVATE_MEMORY;
-- 
2.20.1