The devm_memremap_pages() facility is tightly integrated with the
kernel's memory hotplug functionality. It injects an altmap argument
deep into the architecture specific vmemmap implementation to allow
allocating from specific reserved pages, and it has Linux specific
assumptions about page structure reference counting relative to
get_user_pages() and get_user_pages_fast(). It was an oversight that
this was not marked EXPORT_SYMBOL_GPL from the outset.
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: "Jérôme Glisse" <jglisse@xxxxxxxxxx>
Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
---
kernel/memremap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/memremap.c b/kernel/memremap.c
index 72d0bb6fc47d..766cb9a487ae 100644
--- a/kernel/memremap.c
+++ b/kernel/memremap.c
@@ -430,7 +430,7 @@ void *devm_memremap_pages(struct device *dev, struct dev_pagemap *pgmap)
devres_free(pgmap);
return ERR_PTR(error);
}
-EXPORT_SYMBOL(devm_memremap_pages);
+EXPORT_SYMBOL_GPL(devm_memremap_pages);
unsigned long vmem_altmap_offset(struct vmem_altmap *altmap)
{
