2018-05-28 18:44 GMT+09:00 Ramon Fried ramon.fried@linaro.org:
Add WARN_ONCE definition to allow single time notification of warnings to the user.
Signed-off-by: Ramon Fried ramon.fried@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); \
Where is __WARN_printf() defined?
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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