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

[patchbot@xxxxxxx]

commit f10202d5c7c296c52a69775a4faab7db1b2e478d
Author:     Juergen Gross <jgross@xxxxxxxx>
AuthorDate: Thu Dec 9 14:40:54 2021 +0100
Commit:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Thu Dec 9 16:26:29 2021 +0000

    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@xxxxxxxx>
    Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 tools/libs/ctrl/xc_private.h | 34 ++++++++++++----------------------
 1 file changed, 12 insertions(+), 22 deletions(-)

diff --git a/tools/libs/ctrl/xc_private.h b/tools/libs/ctrl/xc_private.h
index 2e483590e6..6fc98a35a8 100644
--- a/tools/libs/ctrl/xc_private.h
+++ b/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 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 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...) \
+        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
--
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