The recent patches to add support for hugepage vmalloc mappings added a
flag for __vmalloc_node_range to allow to request small pages.
This flag is not accessible when calling vmalloc, the only option is to
call directly __vmalloc_node_range, which is not exported.

This means that a module can't vmalloc memory with small pages.

Case in point: KVM on s390x needs to vmalloc a large area, and it needs
to be mapped with small pages, because of a hardware limitation.

This patch exports __vmalloc_node_range so it can be used in modules
too.

Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Uladzislau Rezki (Sony) <urezki@gmail.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Thomas Gleixner <redacted>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: David Rientjes <rientjes@google.com>
---
 mm/vmalloc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index a13ac524f6ff..bd6fa160b31b 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c

@@ -2937,6 +2937,7 @@ void *__vmalloc_node_range(unsigned long size, unsigned long align,
 
 	return NULL;
 }
+EXPORT_SYMBOL_GPL(__vmalloc_node_range);
 
 /**
  * __vmalloc_node - allocate virtually contiguous memory

-- 
2.31.1