tools/libs/ctrl: Save errno only once in *PRINTF() and *ERROR()

All *PRINTF() and *ERROR() macros are based on xc_reportv() which is
saving and restoring errno in order to not modify it. There is no need
to save and restore in those macros, too.

Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>

tools/libs/ctrl/xc_private.h

@@ -122,28 +122,18 @@ void xc_report_progress_step(xc_interface *xch,
 
 /* anamorphic macros:  struct xc_interface *xch  must be in scope */
 
-#define IPRINTF(_f, _a...)  do { int IPRINTF_errno = errno; \
-        xc_report(xch, xch->error_handler, XTL_INFO,0, _f , ## _a); \
-        errno = IPRINTF_errno; \
-        } while (0)
-#define DPRINTF(_f, _a...) do { int DPRINTF_errno = errno; \
-        xc_report(xch, xch->error_handler, XTL_DETAIL,0, _f , ## _a); \
-        errno = DPRINTF_errno; \
-        } while (0)
-#define DBGPRINTF(_f, _a...)  do { int DBGPRINTF_errno = errno; \
-        xc_report(xch, xch->error_handler, XTL_DEBUG,0, _f , ## _a); \
-        errno = DBGPRINTF_errno; \
-        } while (0)
+#define IPRINTF(_f, _a...) \
+        xc_report(xch, xch->error_handler, XTL_INFO, 0, _f, ## _a)
+#define DPRINTF(_f, _a...) \
+        xc_report(xch, xch->error_handler, XTL_DETAIL, 0, _f, ## _a)
+#define DBGPRINTF(_f, _a...) \
+        xc_report(xch, xch->error_handler, XTL_DEBUG, 0, _f, ## _a)
 
-#define ERROR(_m, _a...)  do { int ERROR_errno = errno; \
-        xc_report_error(xch,XC_INTERNAL_ERROR,_m , ## _a ); \
-        errno = ERROR_errno; \
-        } while (0)
-#define PERROR(_m, _a...) do { int PERROR_errno = errno; \
-        xc_report_error(xch,XC_INTERNAL_ERROR,_m " (%d = %s)", \
-        ## _a , errno, xc_strerror(xch, errno)); \
-        errno = PERROR_errno; \
-        } while (0)
+#define ERROR(_m, _a...) \
+        xc_report_error(xch, XC_INTERNAL_ERROR, _m, ## _a)
+#define PERROR(_m, _a...) \
+        xc_report_error(xch, XC_INTERNAL_ERROR, _m " (%d = %s)", \
+                        ## _a, errno, xc_strerror(xch, errno))
 
 /*
  * HYPERCALL ARGUMENT BUFFERS