[Mini-OS PATCH] Add missing symbol exports for grub-pv

[Juergen Gross <jgross@xxxxxxxx>]

Grub-pv needs start_info_union and phys_to_machine_mapping to be
accessible. Export both symbols.

Fixes: 33411a11f848 ("Mini-OS: hide all symbols not exported via 
EXPORT_SYMBOLS()")
Reported-by: Natanael Copa <ncopa@xxxxxxxxxxxxxxx>
Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
---
 arch/x86/mm.c    | 1 +
 arch/x86/setup.c | 1 +
 2 files changed, 2 insertions(+)

diff --git a/arch/x86/mm.c b/arch/x86/mm.c
index 572e762e..3ba6d917 100644
--- a/arch/x86/mm.c
+++ b/arch/x86/mm.c
@@ -55,6 +55,7 @@
 #endif
 
 unsigned long *phys_to_machine_mapping;
+EXPORT_SYMBOL(phys_to_machine_mapping);
 unsigned long mfn_zero;
 pgentry_t *pt_base;
 EXPORT_SYMBOL(pt_base);
diff --git a/arch/x86/setup.c b/arch/x86/setup.c
index b27bbed7..b613083b 100644
--- a/arch/x86/setup.c
+++ b/arch/x86/setup.c
@@ -41,6 +41,7 @@
  * address of the shared_info structure, and things like that.
  */
 union start_info_union start_info_union;
+EXPORT_SYMBOL(start_info_union);
 #endif
 
 /*
-- 
2.43.0