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Mon, 2 Nov 2026 15:02:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793631763; bh=pQQ1Vs9Ggdq4tGJpsZZ2KAKh5WKICEOKhSgV+25xKrE=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=RNnLcX8egvEl5rPbLFMIscYDo1QnoOrpG6e02ikgGgR/Z2oamdimB42SLpFro378t USbuYkcNHDjjzryLCSmr+2mmsvc3Atos4MVc28LQXLDJayaUp2uu3SYOz50KP5/BKt 3u8kERoVbEfv90E7PC1AQzopGHBD/M7WfJWVvb4TNCYwjGxWo6SsNG7sq/Lq8yJIja zntE5mo3Bhg9BDYczlvI4bibAH3u2IIBa/7c1DzqGQ/HgRro22a3o66odi6Je5Ttco L0BW9ZHBEZJkGL3uRb7ev3sdiVhk7xK/B7muXSKuAHvnwQSKK0opx2IHD1lw9HfJa5 LqGcvESsuLu/A== From: Christian Brauner Date: Mon, 02 Nov 2026 16:01:30 +0100 Subject: [PATCH RFC 03/22] ARM: atags: let procfs copy out reads of /proc/atags X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , Precedence: list X-Archived-By: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20261102-work-procfs-arch-v1-3-c9492ab08480@kernel.org> References: <20261102-work-procfs-arch-v1-0-c9492ab08480@kernel.org> In-Reply-To: <20261102-work-procfs-arch-v1-0-c9492ab08480@kernel.org> 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 X-Mailer: b4 0.17-dev X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_PASS, SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 Implement ->proc_read_buf() so procfs copies what is read to userspace after it unpinned the entry. Signed-off-by: Christian Brauner (Amutable) --- arch/arm/kernel/atags_proc.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/arm/kernel/atags_proc.c b/arch/arm/kernel/atags_proc.c index 8411fbfbcb8b..ff28bf24dd30 100644 --- a/arch/arm/kernel/atags_proc.c +++ b/arch/arm/kernel/atags_proc.c @@ -10,15 +10,15 @@ struct buffer { char data[] __counted_by(size); }; -static ssize_t atags_read(struct file *file, char __user *buf, +static ssize_t atags_read(struct file *file, char *buf, size_t count, loff_t *ppos) { struct buffer *b = pde_data(file_inode(file)); - return simple_read_from_buffer(buf, count, ppos, b->data, b->size); + return memory_read_from_buffer(buf, count, ppos, b->data, b->size); } static const struct proc_ops atags_proc_ops = { - .proc_read = atags_read, + .proc_read_buf = atags_read, .proc_lseek = default_llseek, }; -- 2.53.0