[PATCH] [Groovy] UBUNTU: SAUCE: export __get_vm_area_caller() and map_kernel_range()

[Paolo Pisati]

As explained here:

https://www.virtualbox.org/ticket/19644

and in the recent virtualbox DKMS upload changelog:

https://metadata.ftp-master.debian.org/changelogs/contrib/v/virtualbox/virtualbox_6.1.12-dfsg-8_changelog

Virtualbox DKMS now requires access to these two kernel functions to fix a FTBFS
against Linux 5.8, so until they rewrite their VM code (something that is not
happening anytime soon, see comment 8 in the first link), export these two
symbols.

Signed-off-by: Paolo Pisati <paolo.pisati at canonical.com>
---
 mm/vmalloc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 317afdc7d247..dffac67ba7f7 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -326,6 +326,7 @@ int map_kernel_range(unsigned long start, unsigned long size, pgprot_t prot,
 	flush_cache_vmap(start, start + size);
 	return ret;
 }
+EXPORT_SYMBOL(map_kernel_range);
 
 int is_vmalloc_or_module_addr(const void *x)
 {
@@ -2130,6 +2131,7 @@ struct vm_struct *__get_vm_area_caller(unsigned long size, unsigned long flags,
 	return __get_vm_area_node(size, 1, flags, start, end, NUMA_NO_NODE,
 				  GFP_KERNEL, caller);
 }
+EXPORT_SYMBOL(__get_vm_area_caller);
 
 /**
  * get_vm_area - reserve a contiguous kernel virtual area
-- 
2.25.1