The patch titled
Subject: mm/vmalloc: export __vmalloc_node_range
has been added to the -mm tree. Its filename is
mm-vmalloc-export-__vmalloc_node_range.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-vmalloc-export-__vmalloc_node_range.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-vmalloc-export-__vmalloc_node_range.patch
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------------------------------------------------------
From: Claudio Imbrenda <imbrenda@xxxxxxxxxxxxx>
Subject: mm/vmalloc: export __vmalloc_node_range
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.
Link: https://lkml.kernel.org/r/20210608180618.477766-2-imbrenda@xxxxxxxxxxxxx
Signed-off-by: Claudio Imbrenda <imbrenda@xxxxxxxxxxxxx>
Cc: Nicholas Piggin <npiggin@xxxxxxxxx>
Cc: Uladzislau Rezki (Sony) <urezki@xxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Christian Borntraeger <borntraeger@xxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Janosch Frank <frankja@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/vmalloc.c | 1 +
1 file changed, 1 insertion(+)
--- a/mm/vmalloc.c~mm-vmalloc-export-__vmalloc_node_range
+++ a/mm/vmalloc.c
@@ -2937,6 +2937,7 @@ fail:
return NULL;
}
+EXPORT_SYMBOL_GPL(__vmalloc_node_range);
/**
* __vmalloc_node - allocate virtually contiguous memory
_
Patches currently in -mm which might be from imbrenda@xxxxxxxxxxxxx are
mm-vmalloc-export-__vmalloc_node_range.patch
kvm-s390-fix-for-hugepage-vmalloc.patch
