From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from 013.lax.mailroute.net (013.lax.mailroute.net [199.89.1.16]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 144913B9DBC for ; Tue, 7 Apr 2026 16:05:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=199.89.1.16 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775577951; cv=none; b=tnCMgHOpNJ6rzVeTMLcb+oaa6yB1ghsiSLB+vWczU1O/8FLGcgbDK+ydIDVe+Z/7iy6stIyclpVFs7T5zxiyGb89pFO6IHVaE7JxXP2TTceaVL2dvAMomU13cloTNhc5sMFCGtJc0WOiBo/R/kVst/jhlzuhjnafpwEXcnJW5l0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775577951; c=relaxed/simple; bh=6kBHhGOK4020AEojvgEcBZzqws1dMhu3vrb6nYUER7A=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=ACUA4SLKnhp3XXSMM57LAki65JmsUdSOq2BCWWunYl9lMVeCY+WGlY8IG8rTBtBlVi8qz8aRIm/8tRR2rPWXU+d5XfaT1ZuSK7e5W82BkIoWMvPuCYjgNIlJxc5QXJnOkDMj0rAfTEEw8n1KYlyyzxICaoGc2kXNkitQWV2aaBw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=acm.org; spf=pass smtp.mailfrom=acm.org; dkim=pass (2048-bit key) header.d=acm.org header.i=@acm.org header.b=MOdQXeAx; arc=none smtp.client-ip=199.89.1.16 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=acm.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=acm.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=acm.org header.i=@acm.org header.b="MOdQXeAx" Received: from localhost (localhost [127.0.0.1]) by 013.lax.mailroute.net (Postfix) with ESMTP id 4fqrdT0srdzlh2hS; Tue, 7 Apr 2026 16:05:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=acm.org; h= content-transfer-encoding:mime-version:x-mailer:message-id:date :date:subject:subject:from:from:received:received; s=mr01; t= 1775577925; x=1778169926; bh=OzdtxUGl+Xu0Kapkclq7wwh9T4SqcKwnmUz jsqh+vfY=; b=MOdQXeAxUFw3BsqDnhiqSjp7T1KkmKK6SbRrYi/ZBfZIfXIdop3 wSp1kYypRu0S2FqTxiMF4EorYpTGWVlf/dARDd/vZTCIagEBy4TY8enaxYNK4wRH dOl876mHWpW5oF47IC/Tna0IRtOClPBcBnBeYJSDVq3/jG22Q/y7EzBDojnscF2l Hn3tZVq/KtawsXf0AfiKZ1WoQ6NWFXw73hZqWasRfMLzwSaiypWbztvgefwQO3iu oF78hszgmmRST4nAn0R3ibqurNuSok4zBPAqnVRtCnYxjizjz7HBBvLXzGM+i7jk ZVypbD6rCbKUoBOMiEzHfANRBYb/goVi/6A== X-Virus-Scanned: by MailRoute Received: from 013.lax.mailroute.net ([127.0.0.1]) by localhost (013.lax [127.0.0.1]) (mroute_mailscanner, port 10029) with LMTP id ZuCtzBO1__Te; Tue, 7 Apr 2026 16:05:25 +0000 (UTC) Received: from bvanassche.mtv.corp.google.com (unknown [104.135.180.219]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: bvanassche@acm.org) by 013.lax.mailroute.net (Postfix) with ESMTPSA id 4fqrdF4s4fzlgr46; Tue, 7 Apr 2026 16:05:21 +0000 (UTC) From: Bart Van Assche To: Greg Kroah-Hartman Cc: "Rafael J . Wysocki" , Danilo Krummrich , driver-core@lists.linux.dev, Bart Van Assche , Luis Chamberlain , Petr Pavlu , Daniel Gomez , Sami Tolvanen , Aaron Tomlin , Igor Pylypiv , Chung-Kai Mei , stable@vger.kernel.org Subject: [PATCH] drivers: base: Set mod->async_probe_requested if needed Date: Tue, 7 Apr 2026 09:05:11 -0700 Message-ID: <20260407160511.56289-1-bvanassche@acm.org> X-Mailer: git-send-email 2.53.0.1213.gd9a14994de-goog Precedence: bulk X-Mailing-List: driver-core@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable If PROBE_PREFER_ASYNCHRONOUS is set for a device driver, and if loading other kernel modules depends on probing of that device driver to complete, e.g. because it is a storage driver, and if mod->async_probe_requested has not been set, then the async_synchronize_full() call in do_init_module() introduces a delay. Fix this by setting mod->async_probe_requested if PROBE_PREFER_ASYNCHRONOUS has been set. This patch reduces the Pixel 10 boot time by 100 ms. Cc: Luis Chamberlain Cc: Petr Pavlu Cc: Daniel Gomez Cc: Sami Tolvanen Cc: Aaron Tomlin Cc: Igor Pylypiv Cc: Chung-Kai Mei Cc: stable@vger.kernel.org Signed-off-by: Bart Van Assche --- drivers/base/module.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/base/module.c b/drivers/base/module.c index 218aaa096455..e58fc189d389 100644 --- a/drivers/base/module.c +++ b/drivers/base/module.c @@ -39,6 +39,9 @@ int module_add_driver(struct module *mod, const struct = device_driver *drv) if (!drv) return 0; =20 + if (mod && drv->probe_type =3D=3D PROBE_PREFER_ASYNCHRONOUS) + mod->async_probe_requested =3D true; + if (mod) mk =3D &mod->mkobj; else if (drv->mod_name) {