export mmap_find_vma for shmat

Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
diff --git a/linux-user/mmap.c b/linux-user/mmap.c
index 6f300a0..aa5813f 100644
--- a/linux-user/mmap.c
+++ b/linux-user/mmap.c
@@ -281,7 +281,7 @@
 */
 /* page_init() marks pages used by the host as reserved to be sure not
    to use them. */
-static abi_ulong mmap_find_vma(abi_ulong start, abi_ulong size)
+abi_ulong mmap_find_vma(abi_ulong start, abi_ulong size)
 {
     abi_ulong addr, addr1, addr_start;
     int prot;
diff --git a/linux-user/qemu.h b/linux-user/qemu.h
index 9454e66..d83a2a4 100644
--- a/linux-user/qemu.h
+++ b/linux-user/qemu.h
@@ -229,6 +229,7 @@
 extern unsigned long last_brk;
 void mmap_lock(void);
 void mmap_unlock(void);
+abi_ulong mmap_find_vma(abi_ulong, abi_ulong);
 void cpu_list_lock(void);
 void cpu_list_unlock(void);
 #if defined(USE_NPTL)