From: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Date: Thu, 14 Sep 2017 16:01:38 +0000 (+0200)
Subject: x86/mm: initialize ol1e in create_grant_pv_mapping() for older compilers
X-Git-Tag: archive/raspbian/4.11.1-1+rpi1~1^2~66^2~1419
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=7c9283ea1f2af5c495709c34991df64841d78e7c;p=xen.git

x86/mm: initialize ol1e in create_grant_pv_mapping() for older compilers

On gcc 4.4.4:

mm.c: In function ‘create_grant_pv_mapping’:
mm.c:3839: error: ‘ol1e.l1’ may be used uninitialized in this function

While ol1e would not be used uninitialized (because rc needs to be properly
set) we have to accommodate these older compliers.

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
---

diff --git a/xen/arch/x86/mm.c b/xen/arch/x86/mm.c
index 5208e73734..14dae66664 100644
--- a/xen/arch/x86/mm.c
+++ b/xen/arch/x86/mm.c
@@ -3836,7 +3836,7 @@ int create_grant_pv_mapping(uint64_t addr, unsigned long frame,
 {
     struct vcpu *curr = current;
     struct domain *currd = curr->domain;
-    l1_pgentry_t nl1e, ol1e, *pl1e;
+    l1_pgentry_t nl1e, ol1e = { }, *pl1e;
     struct page_info *page;
     mfn_t gl1mfn;
     int rc = GNTST_general_error;