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Mon, 2 Nov 2026 15:04:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793631863; bh=K/nPdp0KTrkO/JWfX0DeaffmMq6r1stKUZ+oHzzOxP0=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=hg5z4oUZuRz8N20Z5C+Q8yL18Y5yCw7qLkDhvSa3q8JNmsjPQwjzQ+mMuPQCiWUbZ Y7Lf4C3jcwYkPZM9FYjlQwVMt+IVrZBJileSjZkYaIPS9b5zUXk14WIw+JVn7EsOU4 X4PnMaia2Uw5JRPK0Y/IeoZ5Ktq3pARrGiaVdYugzvHIRDhsmeS/p/quiqvdz+vWfE AUGhD3c15oSYVACYkUFkJnNm0xAkDzUFjRuKB9ZEAXO17dJeJqcdRtoI5OGF1GhbZ7 YQIqxbvutG2Qq9CRYrtQhXVKgITYMloJ1QVm1bR6wQ8dUbiyrra8iSth/icVuFpZ8E UfEtn5MBXe+5g== From: Christian Brauner Date: Mon, 02 Nov 2026 16:01:35 +0100 Subject: [PATCH RFC 08/22] powerpc/procfs: let procfs copy out reads of /proc/powerpc/systemcfg 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-v1-8-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/powerpc/kernel/proc_powerpc.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/powerpc/kernel/proc_powerpc.c b/arch/powerpc/kernel/proc_powerpc.c index d083b4517065..46bc914d74b9 100644 --- a/arch/powerpc/kernel/proc_powerpc.c +++ b/arch/powerpc/kernel/proc_powerpc.c @@ -24,10 +24,10 @@ static loff_t page_map_seek(struct file *file, loff_t off, int whence) return fixed_size_llseek(file, off, whence, PAGE_SIZE); } -static ssize_t page_map_read( struct file *file, char __user *buf, size_t nbytes, +static ssize_t page_map_read( struct file *file, char *buf, size_t nbytes, loff_t *ppos) { - return simple_read_from_buffer(buf, nbytes, ppos, + return memory_read_from_buffer(buf, nbytes, ppos, pde_data(file_inode(file)), PAGE_SIZE); } @@ -43,7 +43,7 @@ static int page_map_mmap( struct file *file, struct vm_area_struct *vma ) static const struct proc_ops page_map_proc_ops = { .proc_lseek = page_map_seek, - .proc_read = page_map_read, + .proc_read_buf = page_map_read, .proc_mmap = page_map_mmap, }; -- 2.53.0