[PATCH 2/4] refcount: add ref_trace_final_put tracepoint
From: Eugene Mavick <hidden>
Date: 2026-07-06 06:47:44
Also in:
linux-mm, lkml
Subsystem:
atomic infrastructure, the rest · Maintainers:
Will Deacon, Peter Zijlstra, Boqun Feng, Linus Torvalds
Possibly related (same subject, not in this thread)
- 2026-07-06 · Re: [PATCH 2/4] refcount: add ref_trace_final_put tracepoint · Usama Arif <hidden>
- 2026-07-06 · [PATCH 2/4] refcount: add ref_trace_final_put tracepoint · Eugene Mavick <hidden>
- 2026-07-06 · [PATCH 2/4] refcount: add ref_trace_final_put tracepoint · Eugene Mavick <hidden>
- 2026-07-05 · [PATCH 2/4] refcount: add ref_trace_final_put tracepoint · Eugene Mavick via B4 Relay <devnull+m.mavick.dev@kernel.org>
Add the ref_trace_final_put tracepoint to __refcount_sub_and_test(). This fires when a refcount_t reaches zero, capturing the caller address, the function name, and the refcount_t address. Signed-off-by: Eugene Mavick <redacted> --- include/linux/refcount.h | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/include/linux/refcount.h b/include/linux/refcount.h
index ba7657ced281..7b1fbf326a21 100644
--- a/include/linux/refcount.h
+++ b/include/linux/refcount.h@@ -107,6 +107,7 @@ #include <linux/limits.h> #include <linux/refcount_types.h> #include <linux/spinlock_types.h> +#include <linux/ref_trace.h> struct mutex;
@@ -393,6 +394,7 @@ bool __refcount_sub_and_test(int i, refcount_t *r, int *oldp) if (old > 0 && old == i) { smp_acquire__after_ctrl_dep(); + trace_ref_final_put(r); return true; }
--
2.51.2