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-rw-r--r--include/linux/ioport.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/ioport.h b/include/linux/ioport.h
index 3c73c9c0d4f7..f7930b3dfd0a 100644
--- a/include/linux/ioport.h
+++ b/include/linux/ioport.h
@@ -261,7 +261,7 @@ extern int allocate_resource(struct resource *root, struct resource *new,
struct resource *lookup_resource(struct resource *root, resource_size_t start);
int adjust_resource(struct resource *res, resource_size_t start,
resource_size_t size);
-resource_size_t resource_alignment(struct resource *res);
+resource_size_t resource_alignment(const struct resource *res);
/**
* resource_set_size - Calculate resource end address from size and start