[Xen-devel] [PATCH] x86/cpuid: Fix build with CentOS 6 following c/s 7479151106

[Andrew Cooper <andrew.cooper3@citrix.com>]

GCC of a CentOS 6 vintage complains:

  cpuid.c: In function 'parse_xen_cpuid':
  cpuid.c:32: error: 'mid' may be used uninitialized in this function

This can't occur in practice because the while() loop is guarenteed to be
entered, but initialise mid to work around the issues.

Spotted by Gitlab CI.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
---
CC: Jan Beulich <JBeulich@suse.com>
CC: Wei Liu <wl@xen.org>
CC: Roger Pau Monné <roger.pau@citrix.com>
---
 xen/arch/x86/cpuid.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/arch/x86/cpuid.c b/xen/arch/x86/cpuid.c
index 36b1e2ce4c..acba0f7583 100644
--- a/xen/arch/x86/cpuid.c
+++ b/xen/arch/x86/cpuid.c
@@ -29,7 +29,7 @@ static int __init parse_xen_cpuid(const char *s)
             const char *name;
             unsigned int bit;
         } features[] __initconstrel = INIT_FEATURE_NAMES;
-        const struct feature *lhs, *mid, *rhs;
+        const struct feature *lhs, *rhs, *mid = NULL /* GCC... */;
         const char *feat;
 
         ss = strchr(s, ',');
-- 
2.11.0


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