* [PATCH] include: <asm-generic/bug.h>: implement WARN_ON_ONCE
@ 2022-01-31 7:53 Ahmad Fatoum
2022-01-31 9:43 ` Sascha Hauer
0 siblings, 1 reply; 2+ messages in thread
From: Ahmad Fatoum @ 2022-01-31 7:53 UTC (permalink / raw)
To: barebox; +Cc: Ahmad Fatoum
We have WARN_ON and WARN_ONCE. Add WARN_ON_ONCE as well to accommodate
Linux driver code using it.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
include/asm-generic/bug.h | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/include/asm-generic/bug.h b/include/asm-generic/bug.h
index f20e1b4d65ac..5d0a458eae74 100644
--- a/include/asm-generic/bug.h
+++ b/include/asm-generic/bug.h
@@ -50,4 +50,16 @@
} \
unlikely(__ret_warn_once); \
})
+
+#define WARN_ON_ONCE(condition) ({ \
+ static int __warned; \
+ int __ret_warn_once = !!(condition); \
+ \
+ if (unlikely(__ret_warn_once && !__warned)) { \
+ __warned = 1; \
+ __WARN(); \
+ } \
+ unlikely(__ret_warn_once); \
+})
+
#endif
--
2.30.2
_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2022-01-31 9:45 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-01-31 7:53 [PATCH] include: <asm-generic/bug.h>: implement WARN_ON_ONCE Ahmad Fatoum
2022-01-31 9:43 ` Sascha Hauer
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox