From patchwork Sun May 19 20:24:35 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Elizabeth Figura X-Patchwork-Id: 797815 Received: from mail.codeweavers.com (mail.codeweavers.com [4.36.192.163]) (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 AF4046A340; Sun, 19 May 2024 20:25:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=4.36.192.163 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716150316; cv=none; b=FuuhptwsBnINErDf5+ljS/9kdq7hcK2kB1YoiPSb+W+7m++EvmAAgD+b+Gm5MZCdg7TD4/sgWosaeafJ1L52rJyFqArCpz1YG/Qzrn8m16Hlrd/v5LtK/sHEtzXsYm1Ambr5QrMB6XFf13djjeM8Gn1H6Qk0TYX88Xdbvmzp4pY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716150316; c=relaxed/simple; bh=1LccXFaAPV45Y0RZiRDtNJd+NSqpCVnceyKAJKST3Tc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=K2cuBCcuqpoT15W+5+APBG6cWEcWzWpw4rNSo5vqKpJ1bHykzyb3gHxPbDvKJXlfLjEI6yrUWYx9Y0x9A0KN31qleH7sK0FJ1dQx6oCbXGbxqZ63pKQ3Ox/VQ7rUZ/0NZg9nVOKUPk8kr2bGKKBtvokBxXkux7hs3jxcjrE1FT0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=codeweavers.com; spf=pass smtp.mailfrom=codeweavers.com; dkim=pass (2048-bit key) header.d=codeweavers.com header.i=@codeweavers.com header.b=o8wz8xu2; arc=none smtp.client-ip=4.36.192.163 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=codeweavers.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=codeweavers.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=codeweavers.com header.i=@codeweavers.com header.b="o8wz8xu2" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=codeweavers.com; s=s1; h=Message-ID:Date:Subject:Cc:To:From:Sender; bh=KnWX2k85QT2MAHoz6p77qPHOQoZTmF8C99l666ikqsE=; b=o8wz8xu22a/Hc4uWWk30bBbKff 0zJd/5csKULqJw+h5IQB9Bh/uUzqVcv3MAE4HlhNGAiGS9sp2gDHbu7k5WEzPKXvA39o9LNeOpQRq jPIyKib6JIYkCbtsAPurmzkXRBbt/U/g3KvmbxC93uK+k3XTskfS34oURjTZe90fz7O47xxEaB2JS XkoITmimrWC/b9XX5UXO4C3QOWf/4Um+JjmaibWfTTBJvXHLef17qulJVdTZqwtFHyx5AM4+8k19E TWzEa3oFaeR28b9vWtUoK2JKm2Zgbpn7+jAMVDOHuWyRgL+gkdJSOXVtdFKp8QXlxurrwBlvao2WJ ShxsKY/w==; Received: from cw137ip160.mn.codeweavers.com ([10.69.137.160] helo=camazotz.mn.codeweavers.com) by mail.codeweavers.com with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1s8n5c-008wIn-2h; Sun, 19 May 2024 15:25:04 -0500 From: Elizabeth Figura To: Arnd Bergmann , Greg Kroah-Hartman , Jonathan Corbet , Shuah Khan Cc: linux-kernel@vger.kernel.org, linux-api@vger.kernel.org, wine-devel@winehq.org, =?utf-8?q?Andr=C3=A9_Almeida?= , Wolfram Sang , Arkadiusz Hiler , Peter Zijlstra , Andy Lutomirski , linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, Randy Dunlap , Ingo Molnar , Will Deacon , Waiman Long , Boqun Feng , Elizabeth Figura Subject: [PATCH v5 09/28] ntsync: Introduce NTSYNC_IOC_EVENT_PULSE. Date: Sun, 19 May 2024 15:24:35 -0500 Message-ID: <20240519202454.1192826-10-zfigura@codeweavers.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240519202454.1192826-1-zfigura@codeweavers.com> References: <20240519202454.1192826-1-zfigura@codeweavers.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 This corresponds to the NT syscall NtPulseEvent(). This wakes up any waiters as if the event had been set, but does not set the event, instead resetting it if it had been signalled. Thus, for a manual-reset event, all waiters are woken, whereas for an auto-reset event, at most one waiter is woken. Signed-off-by: Elizabeth Figura --- drivers/misc/ntsync.c | 8 ++++++-- include/uapi/linux/ntsync.h | 1 + 2 files changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/misc/ntsync.c b/drivers/misc/ntsync.c index b070ceccc3af..b0c1d644f0af 100644 --- a/drivers/misc/ntsync.c +++ b/drivers/misc/ntsync.c @@ -534,7 +534,7 @@ static int ntsync_mutex_kill(struct ntsync_obj *mutex, void __user *argp) return ret; } -static int ntsync_event_set(struct ntsync_obj *event, void __user *argp) +static int ntsync_event_set(struct ntsync_obj *event, void __user *argp, bool pulse) { struct ntsync_device *dev = event->dev; __u32 prev_state; @@ -550,6 +550,8 @@ static int ntsync_event_set(struct ntsync_obj *event, void __user *argp) if (all) try_wake_all_obj(dev, event); try_wake_any_event(event); + if (pulse) + event->u.event.signaled = false; ntsync_unlock_obj(dev, event, all); @@ -605,9 +607,11 @@ static long ntsync_obj_ioctl(struct file *file, unsigned int cmd, case NTSYNC_IOC_MUTEX_KILL: return ntsync_mutex_kill(obj, argp); case NTSYNC_IOC_EVENT_SET: - return ntsync_event_set(obj, argp); + return ntsync_event_set(obj, argp, false); case NTSYNC_IOC_EVENT_RESET: return ntsync_event_reset(obj, argp); + case NTSYNC_IOC_EVENT_PULSE: + return ntsync_event_set(obj, argp, true); default: return -ENOIOCTLCMD; } diff --git a/include/uapi/linux/ntsync.h b/include/uapi/linux/ntsync.h index 7fdf79729b20..5586fadd9bdd 100644 --- a/include/uapi/linux/ntsync.h +++ b/include/uapi/linux/ntsync.h @@ -53,5 +53,6 @@ struct ntsync_wait_args { #define NTSYNC_IOC_MUTEX_KILL _IOW ('N', 0x86, __u32) #define NTSYNC_IOC_EVENT_SET _IOR ('N', 0x88, __u32) #define NTSYNC_IOC_EVENT_RESET _IOR ('N', 0x89, __u32) +#define NTSYNC_IOC_EVENT_PULSE _IOR ('N', 0x8a, __u32) #endif