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From: Ramon Fried <ramon.fried@gmail.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH v2] bug.h: introduce WARN_ONCE
Date: Tue, 29 May 2018 15:46:39 +0300	[thread overview]
Message-ID: <20180529124639.13172-1-ramon.fried@gmail.com> (raw)

From: Ramon Fried <ramon.fried@linaro.org>

Add WARN_ONCE definition to allow single time notification
of warnings to the user.

Change-Id: If14d878dba04f3c976c0c2ae079a0f7642047006
---
v2: accidently commited the wrong file. noticed by Masahiro Yamada
 include/linux/bug.h | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/include/linux/bug.h b/include/linux/bug.h
index f07bb716fc0..e43871dee44 100644
--- a/include/linux/bug.h
+++ b/include/linux/bug.h
@@ -20,6 +20,13 @@
 	unlikely(__ret_warn_on);					\
 })
 
+#define WARN(condition, format...) ({                   \
+	int __ret_warn_on = !!(condition);              \
+	if (unlikely(__ret_warn_on))                    \
+		printf(format);                  \
+	unlikely(__ret_warn_on);                    \
+})
+
 #define WARN_ON_ONCE(condition)	({				\
 	static bool __warned;					\
 	int __ret_warn_once = !!(condition);			\
@@ -31,4 +38,15 @@
 	unlikely(__ret_warn_once);				\
 })
 
+#define WARN_ONCE(condition, format...) ({          \
+	static bool __warned;     \
+	int __ret_warn_once = !!(condition);            \
+								\
+	if (unlikely(__ret_warn_once && !__warned)) {       \
+		__warned = true;                \
+		WARN(1, format);                \
+	}                           \
+	unlikely(__ret_warn_once);              \
+})
+
 #endif	/* _LINUX_BUG_H */
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project

             reply	other threads:[~2018-05-29 12:46 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-29 12:46 Ramon Fried [this message]
2018-06-05 14:45 ` [U-Boot] [U-Boot,v2] bug.h: introduce WARN_ONCE Tom Rini
2018-06-05 18:27   ` Ramon Fried
2018-06-05 21:32 [U-Boot] [PATCH v2] " Ramon Fried

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