From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wr1-f47.google.com (mail-wr1-f47.google.com [209.85.221.47]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 36F8B34C80D for ; Mon, 4 May 2026 08:59:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.47 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777885164; cv=none; b=Xp5ZKD9YKGa7BUNtMlq5itDbOlC9bgXoj7QFRTPM/H0yYp+Eih11pwQIvvj7MSDtySN0jq6SPWbN/1hVn5yeNUBSewJmoPNp60HtW4AIgL9BLuYhuP6TkFE3OI/mUmFE3R93zdtvaMTik4tC5BsXAldh2GJw+msQTgnOwH8v7m8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777885164; c=relaxed/simple; bh=dEhNXKwTJpY44w1jN3+6NZdIzztWaYU4GnzJVkjkj6g=; h=Mime-Version:Content-Type:Date:Message-Id:Cc:Subject:From:To: References:In-Reply-To; b=DLOTwDrOUlTpSzr5z7SORApccf8sIOAbondkgvDLc+aS47fL/cL+TkzdZHNR4wsTih0UD79OiZMPFQf16RwF4GjBg5iN306VWbKTeLSZRQwdADSCiZnsusHHLIa0hlDhXpug3dXHyH7HdYqbirxhfJyI2hhKrZ6wLzc+/jHqoBU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=baylibre.com; spf=pass smtp.mailfrom=baylibre.com; dkim=pass (2048-bit key) header.d=baylibre-com.20251104.gappssmtp.com header.i=@baylibre-com.20251104.gappssmtp.com header.b=KVTfDGAJ; arc=none smtp.client-ip=209.85.221.47 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=baylibre.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=baylibre.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=baylibre-com.20251104.gappssmtp.com header.i=@baylibre-com.20251104.gappssmtp.com header.b="KVTfDGAJ" Received: by mail-wr1-f47.google.com with SMTP id ffacd0b85a97d-449e96a8a80so2098484f8f.3 for ; Mon, 04 May 2026 01:59:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20251104.gappssmtp.com; s=20251104; t=1777885159; x=1778489959; darn=vger.kernel.org; h=in-reply-to:references:to:from:subject:cc:message-id:date :mime-version:from:to:cc:subject:date:message-id:reply-to; bh=IDsf9M2K7rO2aXaQIcn1G0mSaPsSRX7OpLrKH4YUyEg=; b=KVTfDGAJWr5BB59jyqnTdPfKZpOhqQoGpC7uWhhoVu8OlyqCKdICPyN47StcFKS5VZ y45VqdWXX3snGhgpdoodLm6ECSu99O2FTgm93HSYkOpm86bgikicdQfLCjEFSzo40Hcf ZfFw02FtbwJzv1kA/DXfDqYj79p6dwD1if9rt9MudQejm74zMn7xv30H0M5oDznuX1ik ahBe4iv/HBODGIHQSooegwYC3a0IS2/eN8Py9X6HF3rlKZo/dVtZ3ja/UNfRAbqcJSmZ EWUDbmTwVI03po9TcChrrzuzvn2UFDZvrfVZ+inafsY9Zc4N5cO5m+FThFpC6vjW64zW 6I4g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1777885159; x=1778489959; h=in-reply-to:references:to:from:subject:cc:message-id:date :mime-version:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=IDsf9M2K7rO2aXaQIcn1G0mSaPsSRX7OpLrKH4YUyEg=; b=N5OfQOQHTNwoXuAH17JbzG3s+dxPfm2pz5Khz3G+N9FIJS1jubmFNbS4bGmFvGlSot Xdg6AN1plxVrTGn9fe4CmmkgVMXFhsHowVmuRZbKhartFWjpqdLFdEK6O0UQSQMk+Nhr yJCE3keifH5BCNaFcB4ImBpUBiTKCMHlaUkv8hpjoHHS5SWH+sOAGtojufBj30dkHvrL XfgdEI9dYXHgzKERXYpSlDKeb6aYDC/Ew/zynOGlMycko2OdhPxgn2NWKEpBq1bFptqP mkPF05IpKvKZhc7XfpHFDzYF2ZSfIM3daNpLbAOe3YjFBSF1za+II1htI9hDBzRD3nwV Qjvg== X-Forwarded-Encrypted: i=1; AFNElJ/818kJG/1YmPJRF/ZWSr92ubkS1qObvohkwySSfwCzqZdrCfEKwv3T+ExhWg0bRSAvBcfzLlO+TAPZ6QU=@vger.kernel.org X-Gm-Message-State: AOJu0YwcNw8gYe7DWNZMMCfKr4Cr8ZZ/xSh6myZgA+ndD9JYSQIF0wDF uSxXxd9K6jpdqU9rVc7pHJRgHCqVjcd0KO/LLL8LiX62J1WGLp+U71hvM+qjy6Bj1ys= X-Gm-Gg: AeBDietr9rMJkO05g2xVa82mE/6xeTNJ1COK1kuheFSdzSmhibHGFMl0hjeDQWiPhHK NCtyUt5aonlhVjA+xygI3cZKlY3BtHlptIj4mk1Y0FK+hvD+Jn+jdcG9LYA99KdxE0pK+gS5cAX 56YJFWzACmv6bUxrOgGSOZiHVFAgY7b6z+AMdIYrTHtZ6mttQJq04pVuhXo+cp3mZJmx7xwXf1I 4jFsKK5ETDTAdqnqqjmi1xTjJU2+dgXwRTdWpYSBtMjKh/frIAZxsPGCXqIJ5FvPXDO2lAvY8DK 5lgxrqiB9xC8KoZxYl5JvkAMXY2FSnGKBfLmJMm3PbTKDhXNIQEEKUrZLntSDeh/ah6IQamog5i Jco192KxtcOEG5AbYyjwIOePNU/fiWzF9GDAyuDHMnRF8/OLJfosDbmLe7zbigsxOh6z73qGiCX mCcML8m7sb340TuYm73nfCMTB3fQ== X-Received: by 2002:a05:6000:2dc6:b0:43f:e99a:ff91 with SMTP id ffacd0b85a97d-44bb4538036mr13012151f8f.4.1777885159017; Mon, 04 May 2026 01:59:19 -0700 (PDT) Received: from localhost ([62.246.35.158]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-44a8f237368sm23339485f8f.14.2026.05.04.01.59.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 04 May 2026 01:59:18 -0700 (PDT) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Content-Type: multipart/signed; boundary=35a30cf5af1e13a12720f82ef798f2848d6696bf81a6e26b812c6fdf99b8; micalg=pgp-sha512; protocol="application/pgp-signature" Date: Mon, 04 May 2026 10:59:10 +0200 Message-Id: Cc: "Markus Schneider-Pargmann" , , Subject: Re: [PATCH] tracing: probes: remove unused variable From: "Markus Schneider-Pargmann" To: "Martin Kaiser" , "Steven Rostedt" , "Masami Hiramatsu" X-Mailer: aerc 0.21.0-126-g9e77103592fe References: <20260502135826.146257-1-martin@kaiser.cx> In-Reply-To: <20260502135826.146257-1-martin@kaiser.cx> --35a30cf5af1e13a12720f82ef798f2848d6696bf81a6e26b812c6fdf99b8 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=UTF-8 On Sat May 2, 2026 at 3:57 PM CEST, Martin Kaiser wrote: > params is always NULL in traceprobe_expand_meta_args, it can be removed. > > Signed-off-by: Martin Kaiser Reviewed-by: Markus Schneider-Pargmann (The Capable Hub) Best Markus > --- > Would it be better to return ERR_PTR(-EOPNOTSUPP) instead of NULL, simila= r to > what is done in other places where NOSUP_BTFARG is logged? This would mak= e the > parsing fail if $arg* is used without BTF support. At the moment, we skip= the > $arg*... > > kernel/trace/trace_probe.c | 3 +-- > 1 file changed, 1 insertion(+), 2 deletions(-) > > diff --git a/kernel/trace/trace_probe.c b/kernel/trace/trace_probe.c > index e0d3a0da26af..b627093a941e 100644 > --- a/kernel/trace/trace_probe.c > +++ b/kernel/trace/trace_probe.c > @@ -1729,7 +1729,6 @@ const char **traceprobe_expand_meta_args(int argc, = const char *argv[], > int *new_argc, char *buf, int bufsize, > struct traceprobe_parse_context *ctx) > { > - const struct btf_param *params =3D NULL; > int i, j, n, used, ret, args_idx =3D -1; > const char **new_argv __free(kfree) =3D NULL; > =20 > @@ -1747,7 +1746,7 @@ const char **traceprobe_expand_meta_args(int argc, = const char *argv[], > if (args_idx !=3D -1) { > /* $arg* requires BTF info */ > trace_probe_log_err(0, NOSUP_BTFARG); > - return (const char **)params; > + return NULL; > } > *new_argc =3D argc; > return NULL; --35a30cf5af1e13a12720f82ef798f2848d6696bf81a6e26b812c6fdf99b8 Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iKMEABYKAEsWIQSJYVVm/x+5xmOiprOFwVZpkBVKUwUCafhf3hsUgAAAAAAEAA5t YW51MiwyLjUrMS4xMiwyLDIRHG1zcEBiYXlsaWJyZS5jb20ACgkQhcFWaZAVSlPA zgD+P6p7zHSnQM1LXdyxRfqjN6QN4jJzqHnZB+0O2/nlJuMA/il9i2jv73MyVJ7H SnJEW7P6DiDFi8pyQ95hDU58orMK =jN9s -----END PGP SIGNATURE----- --35a30cf5af1e13a12720f82ef798f2848d6696bf81a6e26b812c6fdf99b8--