From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 12740C88E53 for ; Tue, 15 Sep 2026 11:34:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To:References :Message-Id:Content-Transfer-Encoding:Content-Type:MIME-Version:Subject:Date: From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=fPUeEhZalZFbuqvBU8/iDG2tqjgIH/ueKLGrOGx0E/Q=; b=Kxb/h5zrirzwKaxC54ufkrIi40 arwA1z30PbDY4F4E/CG4iyVKS9942DwTD/Kb1j+ZDpX55kig+sX6AlzdZEH3Cea+4v3BO9qUK7DCa ijc9QCIkQWMjMBYQrwArvD34jXrq8NFwFxeQ+TOdR7otaosOEa/zL97XsI4+Xn/lWZzTwFaYHTJhE dBLpgE2QGB6X7drY2/rgdX18Qp2QBwyI8JUZX6xBF6DKue5jTmqnEdm6inGy6DFS2nFlEMC2cKqug 1LfhGtqGmVWxP3zzVW/43muOGq4gRQLzjLfIIFgwldDmbj9GCy45rv/wNhvvD6R/cl49PP7zPvmik 3XmcRvzg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x6RQD-00000006A1S-1G8W; Tue, 15 Sep 2026 11:33:57 +0000 Received: from sea.source.kernel.org ([2600:3c0a:e001:78e:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1x6RQ2-000000069lJ-3Uqb; Tue, 15 Sep 2026 11:33:46 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 88ED742A92; Tue, 15 Sep 2026 11:33:46 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 32EB01F00898; Tue, 15 Sep 2026 11:33:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789472026; bh=fPUeEhZalZFbuqvBU8/iDG2tqjgIH/ueKLGrOGx0E/Q=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=Nmpj4NaFXMtUCUBJkK324vi22fpzvX6uomFULBZJOjhgDQCroZWI/8lb8hRAJVCHh 9EhYq/igSRVSJd0Z69cCAreFakLrT8v7g5ED2rGJFufV7eihjNzGDapElAJqkyWjpl lBXB4AtsKeIiuD1UD4coI3pcXNoLmTr78UlIqOkuglt9Hw0oChJkwnEGg4w0f6UJ0f E3lrRN0G+U0+0MXEDUccPLURv/tGCWrEtzl5wBa6tk79GG6qHRxEjmf3jJK1LMmPo3 /VFHB2tZrT068p2qgHGbLHusKwE8Tye3wqbBTFb6QOLjp++ERuzcM9sRPxtZnWLn1E KgqcMBfnsrMfA== From: Christian Brauner Date: Tue, 15 Sep 2026 13:31:05 +0200 Subject: [PATCH RFC POC 19/50] file: require the syscall exit hook from every architecture MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260915-work-fd-reserve-unify-folded-v1-19-4d5217d6b246@kernel.org> References: <20260915-work-fd-reserve-unify-folded-v1-0-4d5217d6b246@kernel.org> In-Reply-To: <20260915-work-fd-reserve-unify-folded-v1-0-4d5217d6b246@kernel.org> To: Linus Torvalds Cc: Alexander Viro , Jann Horn , Jan Kara , Ingo Molnar , Peter Zijlstra , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Oleg Nesterov , linux-alpha@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-openrisc@vger.kernel.org, linux-parisc@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, Jens Axboe , io-uring@vger.kernel.org, netdev@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-gpio@vger.kernel.org, linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, bpf@vger.kernel.org, David Airlie , virtualization@lists.linux.dev, kvm@vger.kernel.org, kexec@lists.infradead.org, linux-hyperv@vger.kernel.org, "Christian Brauner (Amutable)" X-Mailer: b4 0.17-dev-db0b7 X-Developer-Signature: v=1; a=openpgp-sha256; l=1044; i=brauner@kernel.org; h=from:subject:message-id; bh=kO5/kQT0XZnIdRnIvngddyYIzT4ZNU9mDakuELDqlrQ=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWSt1Kmt7K/PWBxqv33Jx9xZ93feiJvYXvn0wyGRJfor4 xvDgz5O7ChlYRDjYpAVU2RxaDcJl1vOU7HZKFMDZg4rE8gQBi5OAZjImo8M/0t6Hp5cOHfxxr5q 5ZTEWby+CmuzN2gtu/o25VNw3Kl5VQ8Z/ns2bzkbtn3/k1lfb3I0OE2bn/HePMr9P8+ZRZUPSuV nr+YCAA== X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Every architecture now either uses the generic entry code or provides TIF_FD_SLOTS. The fallback that deferred without ever committing can go. Make it a build error instead. A new architecture can't grow fd_prepare() callers without the syscall exit hook. Signed-off-by: Christian Brauner (Amutable) --- fs/file.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/fs/file.c b/fs/file.c index 6fa481d63dcf..2b041b45f225 100644 --- a/fs/file.c +++ b/fs/file.c @@ -652,9 +652,7 @@ static void fd_release(unsigned int fd) #define fd_slots_set_work() set_thread_flag(TIF_FD_SLOTS) #define fd_slots_clear_work() clear_thread_flag(TIF_FD_SLOTS) #else -/* Nothing commits until the architecture provides the flag. */ -#define fd_slots_set_work() do { } while (0) -#define fd_slots_clear_work() do { } while (0) +#error "the syscall exit path must commit prepared file descriptors" #endif static struct fd_slot *fd_slot(struct fd_slots *slots, unsigned int idx) -- 2.53.0