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t=1785582051; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=C912dpGQcVcNQokG8z6F9kwSDBoO6n2Gknkhy/XwQHc=; b=b7oXTNTjj2ZCjCrjXH+4onJXBZ6okt7C6WdM+iEtplUoOlZh0An8Gt1LjzqSL5V97xIZT4 h7Vkq7kXdpBxiePE+e1Oo7O+4aCj4HDTlio+MwKv31V7yZetw03K+6hRotzC1IvPSipcyp aO9aKbTG+FscVo4yCU020JW1nEY2VAIATiXBYprDl99x7J7KBELWSUFVGyI5wVOidvM3PI ocmxALYuXyiTEcxHaHyxI8wnw5Cc0RQmfx+zteGZobHxeiPopl8XeWsM+Ff54vL8pYq42i CXcKgsPMj9LdyKM6HtN1KmZOGa2Wj7TMU2F6OlBg3h7eEY2e2WkTFlT0uUwVwA== From: Eugene Mavick Date: Sat, 01 Aug 2026 18:59:42 +0800 Subject: [PATCH v4 2/5] refcount: add ref_trace_final_put tracepoint MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260801-refcount-final-put-trace-v4-2-2e58678f0ffd@mavick.dev> References: <20260801-refcount-final-put-trace-v4-0-2e58678f0ffd@mavick.dev> In-Reply-To: <20260801-refcount-final-put-trace-v4-0-2e58678f0ffd@mavick.dev> To: Will Deacon , Peter Zijlstra , Boqun Feng , Mark Rutland , Gary Guo , Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , Andrew Morton , Dennis Zhou , Tejun Heo , Christoph Lameter Cc: linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-mm@kvack.org, Eugene Mavick X-Developer-Signature: v=1; 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Signed-off-by: Eugene Mavick --- include/linux/refcount.h | 2 ++ lib/refcount.c | 6 +++++- 2 files changed, 7 insertions(+), 1 deletion(-) diff --git a/include/linux/refcount.h b/include/linux/refcount.h index ba7657ced281..70d07a462da1 100644 --- a/include/linux/refcount.h +++ b/include/linux/refcount.h @@ -107,6 +107,7 @@ #include #include #include +#include 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(); + do_trace_ref_final_put(r); return true; } diff --git a/lib/refcount.c b/lib/refcount.c index a207a8f22b3c..ab88d4674942 100644 --- a/lib/refcount.c +++ b/lib/refcount.c @@ -7,6 +7,7 @@ #include #include #include +#include #define REFCOUNT_WARN(str) WARN_ONCE(1, "refcount_t: " str ".\n") @@ -56,7 +57,10 @@ bool refcount_dec_if_one(refcount_t *r) { int val = 1; - return atomic_try_cmpxchg_release(&r->refs, &val, 0); + bool ret = atomic_try_cmpxchg_release(&r->refs, &val, 0); + + do_trace_ref_final_put_cond(ret, r); + return ret; } EXPORT_SYMBOL(refcount_dec_if_one); -- 2.51.2