Update from upstream with manual merge of Yasunori Goto's

changes to swiotlb.c made in commit 281dd25cdc0d6903929b79183816d151ea626341
since this file has been moved from arch/ia64/lib/swiotlb.c to
lib/swiotlb.c

Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/arch/um/os-Linux/tt.c b/arch/um/os-Linux/tt.c
index 5b047ab8416a..a6db8877931a 100644
--- a/arch/um/os-Linux/tt.c
+++ b/arch/um/os-Linux/tt.c
@@ -36,6 +36,20 @@
 #include "mode.h"
 #include "tempfile.h"
 
+int protect_memory(unsigned long addr, unsigned long len, int r, int w, int x,
+                   int must_succeed)
+{
+        int err;
+
+        err = os_protect_memory((void *) addr, len, r, w, x);
+        if(err < 0){
+                if(must_succeed)
+                        panic("protect failed, err = %d", -err);
+                else return(err);
+        }
+        return(0);
+}
+
 /*
  *-------------------------
  * only for tt mode (will be deleted in future...)