From patchwork Wed Jan 10 15:47:40 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wen Yang X-Patchwork-Id: 13516286 Received: from out203-205-221-245.mail.qq.com (out203-205-221-245.mail.qq.com [203.205.221.245]) (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 E7C3E4C608; Wed, 10 Jan 2024 15:56:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=foxmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=foxmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=foxmail.com header.i=@foxmail.com header.b="LFL9ceFd" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=foxmail.com; s=s201512; t=1704902183; bh=wQOXJIJsJ7TK3AdRldjWOw0I/FRpUAQIImnC0W7okJk=; h=From:To:Cc:Subject:Date; b=LFL9ceFdkgvzsuoC9RKNS4/j9v+H8n9ohcAoCU5J+LRtzUr/l18WqmDCAodMQ0F0y X/aDu9XUxQzy9HK4XNERxNei2AI6/DpPFaMTj4ajETiLk6UESfEnY6LA8q3Eaed6/8 9A5v0IqrnC3pWATXdmr6j0j0kPgtVvrWoCLz5tIc= Received: from localhost.localdomain ([2409:8a60:2a63:2f30:ff74:6daa:56dc:111e]) by newxmesmtplogicsvrszc5-1.qq.com (NewEsmtp) with SMTP id BF136234; Wed, 10 Jan 2024 23:47:49 +0800 X-QQ-mid: xmsmtpt1704901669t7kbz5a5d Message-ID: X-QQ-XMAILINFO: NojR6Ao/DkEDBb1YCk5PeOKZPS2yurQUYj2r9Yt9x6JBtQEZbkp7fGPKYGatb4 D2hHpJqq3ojfDXxgFtDWZ2S1X4YqciNh/aHgaP92FnaBybEEp4TWDkViTWHlWPH1ZOgfdijpkudJ JMAc9lsHucXr5iu7urC20Ynepgueni8EKxqNOuwgtSkZWAdCpJVaVljsKjr8bnHgG80zfS9WiqsE hHRRFPzbkxRH4O8YR2J8hsLsD9q8EbFVkoiyCfAVB3Ku4ECWV2quS+knS23nmckn4rQZOUrnAZbH 9XFr7EKYFmtoM3lyAeQy95qYXZPKbiq+ve3kZRx5p4p0TCp4/Too0W9Cl7U5ghe+W434fqcJIu53 cj9ZGRT3vhcIOrWxPL5ASVIGXKvlaYzyYoNub3XugxbDqPXCgXDNAaSv2HZasAYznwPWvojB4jbo F2e+s989VDEp/5K/4+SRTUOLEXGiNtUqYcxZny1/Wv3GbNza9aSXXba9UU3RGOGKTxGla5RzV6A8 idbc/04xaEMjkqFQQ/k7JeDZNlQVEUOK0NjIUeN3QSOWM/tWW9/9v2IG4NUkUEbj6n22eacudrEv Tm4rdb4PGyZsa4aykGAPa4MVJSNKSd6WnDOgKWMXPDKpduvW7FXGmJ3/W2uWI18P3aayjGicZz4P v44eELgdWqEBjH4Uh0E+I6poip2dl1UxEQMRgayyKf4VNySL4ItZDvPhB5C8WgBtdDBx5uvhPJB6 IE99UI9Qyt3+HrH31BGW2dlV7koxePm+AJPJW4HthCS21xsKug7wssLTYqHHT8v5o/wWMRPSf4aF PvVMOyAM6blZiz4T4VoxefzTatnp+vcQfnuOl3CBoPwW8rfPZAkEEFFfnOTpubKxeSX8eW1IARHd PxwV8u+fCBvEiDInIWtLO1nWQS0wx5H9pu9nqLBRJleR+h2UskxoycDZgCKvEePau1YMGDpx+rMm 4kY3tqKGy7QnJ+lUL0N6DQqmtzcg1MauQvODf8GKE6yp14nJrbIDyxI4tpUa+nyZQ8b66JaTcxc0 qa06QDSw== X-QQ-XMRINFO: OWPUhxQsoeAVDbp3OJHYyFg= From: wenyang.linux@foxmail.com To: Christian Brauner , Jens Axboe , Alexander Viro Cc: Wen Yang , Jan Kara , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] eventfd: add a BUILD_BUG_ON() to ensure consistency between EFD_SEMAPHORE and the uapi Date: Wed, 10 Jan 2024 23:47:40 +0800 X-OQ-MSGID: <20240110154740.41888-1-wenyang.linux@foxmail.com> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Wen Yang introduce a BUILD_BUG_ON to check that the EFD_SEMAPHORE is equal to its definition in the uapi file, just like EFD_CLOEXEC and EFD_NONBLOCK. Signed-off-by: Wen Yang Cc: Alexander Viro Cc: Christian Brauner Cc: Jens Axboe Cc: Jan Kara Cc: linux-fsdevel@vger.kernel.org Cc: linux-kernel@vger.kernel.org --- fs/eventfd.c | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/eventfd.c b/fs/eventfd.c index 93848573c877..c1f5d71e7197 100644 --- a/fs/eventfd.c +++ b/fs/eventfd.c @@ -502,6 +502,7 @@ static int do_eventfd(unsigned int count, int flags) /* Check the EFD_* constants for consistency. */ BUILD_BUG_ON(EFD_CLOEXEC != O_CLOEXEC); BUILD_BUG_ON(EFD_NONBLOCK != O_NONBLOCK); + BUILD_BUG_ON(EFD_SEMAPHORE != (1 << 0)); if (flags & ~EFD_FLAGS_SET) return -EINVAL;