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

Christoph Hellwig
2019-08-11T08:15:28Z

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 <hch@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