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[4/8] headers: add __vstring and __assign_vstr

Message ID 20221013085351.14516-4-nbd@nbd.name (mailing list archive)
State New, archived
Headers show
Series [1/8] headers: backport napi add functions | expand

Commit Message

Felix Fietkau Oct. 13, 2022, 8:53 a.m. UTC 
Used within tracepoints on a few drivers

Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
 backport/backport-include/trace/trace_events.h | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 create mode 100644 backport/backport-include/trace/trace_events.h
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Patch

diff --git a/backport/backport-include/trace/trace_events.h b/backport/backport-include/trace/trace_events.h
new file mode 100644
index 000000000000..fd6a4f3c343d
--- /dev/null
+++ b/backport/backport-include/trace/trace_events.h
@@ -0,0 +1,16 @@ 
+#include <linux/version.h>
+
+#if LINUX_VERSION_IS_LESS(6,0,0)
+#undef VSTRING_MSG_MAX
+#define VSTRING_MSG_MAX	512
+
+#undef __vstring
+#define __vstring(msg, fmt, va) __dynamic_array(char, msg, VSTRING_MSG_MAX)
+
+#undef __assign_vstr
+#define __assign_vstr(msg, fmt, va)					  \
+	WARN_ON_ONCE(vsnprintf(__get_dynamic_array(msg), VSTRING_MSG_MAX, \
+			       fmt, *va) >= VSTRING_MSG_MAX)
+#endif /* <6.0 */
+
+#include_next <trace/trace_events.h>