[PATCH 2/5] x86/PV: rename a local variable in pv_emulate_gate_op()

[Jan Beulich <jbeulich@suse.com>]

... shadowing a function scope one, thus violating Misra C:2012 rule 5.3
("An identifier declared in an inner scope shall not hide an identifier
declared in an outer scope"). No difference in generated code.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
---
Technically, as the outer scope "rc" isn't used again later, we could
simply drop the inner decl. That seemed more error prone to me, though.

--- a/xen/arch/x86/pv/emul-gate-op.c
+++ b/xen/arch/x86/pv/emul-gate-op.c
@@ -286,16 +286,16 @@ void pv_emulate_gate_op(struct cpu_user_
     if ( !jump )
     {
         unsigned int ss, esp, *stkp;
-        int rc;
+        int left;
 #define push(item) do \
         { \
             --stkp; \
             esp -= 4; \
-            rc = __put_guest(item, stkp); \
-            if ( rc ) \
+            left = __put_guest(item, stkp); \
+            if ( left ) \
             { \
                 pv_inject_page_fault(PFEC_write_access, \
-                                     (unsigned long)(stkp + 1) - rc); \
+                                     (unsigned long)(stkp + 1) - left); \
                 return; \
             } \
         } while ( 0 )
@@ -359,10 +359,11 @@ void pv_emulate_gate_op(struct cpu_user_
                     unsigned int parm;
 
                     --ustkp;
-                    rc = __get_guest(parm, ustkp);
-                    if ( rc )
+                    left = __get_guest(parm, ustkp);
+                    if ( left )
                     {
-                        pv_inject_page_fault(0, (unsigned long)(ustkp + 1) - rc);
+                        pv_inject_page_fault(0,
+                                             (unsigned long)(ustkp + 1) - left);
                         return;
                     }
                     push(parm);