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List: openvz-criu
Subject: [CRIU] [PATCH 1/3] log: add pr_err_once
From: avagin () openvz ! org (Andrey Vagin)
Date: 2012-11-29 12:43:37
Message-ID: 1354193019-7979-1-git-send-email-avagin () openvz ! org
[Download RAW message or body]
This function prints an error message only once.
Signed-off-by: Andrey Vagin <avagin at openvz.org>
---
include/log.h | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/include/log.h b/include/log.h
index d02c4a6..375dd38 100644
--- a/include/log.h
+++ b/include/log.h
@@ -30,6 +30,14 @@ extern void print_on_level(unsigned int loglevel, const char *format, ...)
#define pr_info(fmt, ...) \
print_on_level(LOG_INFO, LOG_PREFIX fmt, ##__VA_ARGS__)
+#define pr_err_once(fmt, ...) ({ \
+ static bool __printed; \
+ if (!__printed) { \
+ print_on_level(LOG_ERROR, "Error (%s:%d): " LOG_PREFIX fmt, __FILE__, __LINE__, ##__VA_ARGS__); \
+ __printed = 1; \
+ } \
+})
+
#define pr_err(fmt, ...) \
print_on_level(LOG_ERROR, "Error (%s:%d): " LOG_PREFIX fmt, __FILE__, __LINE__, ##__VA_ARGS__)
--
1.7.11.7
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