linux-user: fix build on hosts not using guest base

Commit 68a1c816868b3e35a1da698af412b29e61b1948a broke qemu on hosts not
using guest base. It uses reserved_va unconditionally in mmap.c. To
avoid to many #ifdef #endif blocks, define RESERVED_VA as either
reserved_va or 0ul, and use it instead of reserved_va, similarly to what
has been done with guest_base/GUEST_BASE.
(cherry picked from commit 18e9ea8a3f36b0a3845e1ac6d8acd180063bed8f)

1 files changed, 2 insertions, 0 deletions

diff --git a/cpu-all.h b/cpu-all.h
index 224ca40c1d..67a32664d5 100644
--- a/cpu-all.h
+++ b/cpu-all.h
@@ -629,8 +629,10 @@ extern unsigned long guest_base;
 extern int have_guest_base;
 extern unsigned long reserved_va;
 #define GUEST_BASE guest_base
+#define RESERVED_VA reserved_va
 #else
 #define GUEST_BASE 0ul
+#define RESERVED_VA 0ul
 #endif
 
 /* All direct uses of g2h and h2g need to go away for usermode softmmu.  */