Add WARN_ONCE definition to allow single time notification
of warnings to the user.
Signed-off-by: Ramon Fried <ramon.fr...@gmail.com>
---
include/linux/bug.h | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/include/linux/bug.h b/include/linux/bug.h
index f07bb716fc0..67b6057a22a 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)) \
+ __WARN_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 */
--
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a Linux Foundation Collaborative Project
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