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smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=iWisENYU; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CC72B6070F21; Wed, 4 Nov 2026 19:40:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=iWisENYU Received: by smtp.kernel.org (Postfix) with ESMTPSA id 400AF1F000C1; Wed, 4 Nov 2026 19:39:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793821203; bh=I1miZOwU+uS7OyZJ+vljGqgplXbL3g+w9Z/kHpw+0Ic=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=iWisENYUjAJsAzBSE3lGImGvChgp+BG03nV/9zJNmEmVEQqMUuspDJmWqJOL8vdCY oHV2GpTw7nzhZ8YSayGsDUlJzGRv0ThytArIl/pXnKxEHGqUREbYMyptK2QRO4tWb+ 0MJ2nNe6OsnVhX9kRXAgGrur5t53VezJ+BwOWZY1lK1M/S2AcooFeGbuJTcHh6MMK5 Q0olsGHFDarOPT5Tg5XxJr8bNViO7g5QRvPbnb/bbKcsghMepoAlwc9fQuisDpBdNj xEFmyHVac3X4qFr6hW2l+JvJkyvtiVxI0WdyYW/zK53nj9PA2sh6Z3KYMrD0GYvMbO MorJYVNGc2nSQ== From: Christian Brauner To: linux-fsdevel@vger.kernel.org Cc: Linus Torvalds , Jann Horn , Josef Bacik , Chris Mason , Jeff Layton , NeilBrown , Eric Dumazet , Thomas Gleixner , Al Viro , Jonathan Corbet , Christoph Hellwig , Greg Kroah-Hartman , Joel Granados , Kees Cook , Jan Kara , Jan Kara , linux-kernel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-acpi@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-s390@vger.kernel.org, linux-scsi@vger.kernel.org, linux-um@lists.infradead.org, linux-wireless@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, netdev@vger.kernel.org, ntfs3@lists.linux.dev, platform-driver-x86@vger.kernel.org, coreteam@netfilter.org, kexec@lists.infradead.org, linux-pci@vger.kernel.org, linux-sound@vger.kernel.org, netfilter-devel@vger.kernel.org, dri-devel@lists.freedesktop.org, ibm-acpi-devel@lists.sourceforge.net, jfs-discussion@lists.sourceforge.net, linux-alpha@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-cifs@vger.kernel.org, linux-fbdev@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-mm@kvack.org, linux-sh@vger.kernel.org, linux-usb@vger.kernel.org, samba-technical@lists.samba.org, sparclinux@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-doc@vger.kernel.org, linux-serial@vger.kernel.org, linux-atm-general@lists.sourceforge.net, Takashi Iwai , linux-input@vger.kernel.org, linux-raid@vger.kernel.org, linux-ext4@vger.kernel.org, linux-modules@vger.kernel.org, linux-debuggers@vger.kernel.org, "Christian Brauner (Amutable)" , Chuck Lever Subject: [PATCH RESEND v2 17/23] xtensa: simdisk: let procfs copy out reads Date: Wed, 4 Nov 2026 20:39:48 +0100 Message-ID: <20261104-work-procfs-arch-v2-17-2aeb952c9597@kernel.org> In-Reply-To: <20261104-work-procfs-arch-v2-0-2aeb952c9597@kernel.org> References: <20261104-work-procfs-arch-v2-0-2aeb952c9597@kernel.org> X-Mailing-List: linux-fbdev@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" X-Mailer: b4 0.17-dev X-Developer-Signature: v=1; a=openpgp-sha256; l=1498; i=brauner@kernel.org; h=from:subject:message-id; bh=lmVHOivhxd1ieO/qCxQCbfFgZys6nsQ8zrRpqRkdZ/o=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWS97mTUYCmvn7tj1bZ3nRPePsj/znEsO+Ut/5eb7fKhN Rlbli062VHKwiDGxSArpsji0G4SLrecp2KzUaYGzBxWJpAhDFycAjAR3UKG/45fU9K/nja5HyLM 7nljky3/puSce6cM0zZzlOzMKnx6ch0jQ/vS7+rz7ONa9NtY1Yu1H+1jtI6Tci9wC2pP5fa2eZP IAwA= X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 Content-Transfer-Encoding: 8bit Implement ->proc_read_buf() so procfs copies what is read to userspace after it unpinned the entry. Signed-off-by: Christian Brauner (Amutable) --- arch/xtensa/platforms/iss/simdisk.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/xtensa/platforms/iss/simdisk.c b/arch/xtensa/platforms/iss/simdisk.c index 26c2fa39a66e..cfddfcd06be7 100644 --- a/arch/xtensa/platforms/iss/simdisk.c +++ b/arch/xtensa/platforms/iss/simdisk.c @@ -234,7 +234,7 @@ static int simdisk_detach(struct simdisk *dev) return err; } -static ssize_t proc_read_simdisk(struct file *file, char __user *buf, +static ssize_t proc_read_simdisk(struct file *file, char *buf, size_t size, loff_t *ppos) { struct simdisk *dev = pde_data(file_inode(file)); @@ -250,7 +250,7 @@ static ssize_t proc_read_simdisk(struct file *file, char __user *buf, len = scnprintf(temp, PAGE_SIZE + 2, "%s\n", dev->filename ?: ""); spin_unlock(&dev->lock); - len = simple_read_from_buffer(buf, size, ppos, temp, len); + len = memory_read_from_buffer(buf, size, ppos, temp, len); kfree(temp); return len; } @@ -280,7 +280,7 @@ static ssize_t proc_write_simdisk(struct file *file, char *buf, } static const struct proc_ops simdisk_proc_ops = { - .proc_read = proc_read_simdisk, + .proc_read_buf = proc_read_simdisk, .proc_write_buf = proc_write_simdisk, .proc_write_size = PAGE_SIZE, .proc_lseek = default_llseek, -- 2.53.0