+ mm-vmalloc-export-__vmalloc_node_range.patch added to -mm tree

+ mm-vmalloc-export-__vmalloc_node_range.patch added to -mm tree

[akpm]

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@linux.ibm.com>
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@linux.ibm.com
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Uladzislau Rezki (Sony) <urezki@gmail.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Janosch Frank <frankja@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 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@linux.ibm.com are

mm-vmalloc-export-__vmalloc_node_range.patch
kvm-s390-fix-for-hugepage-vmalloc.patch