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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=oLDqIOTw; 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 10161607F96C; Wed, 4 Nov 2026 19:38:04 +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=oLDqIOTw Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8D9BF1F00A1B; Wed, 4 Nov 2026 19:37:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793821084; bh=K/nPdp0KTrkO/JWfX0DeaffmMq6r1stKUZ+oHzzOxP0=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=oLDqIOTwTl44qDXUKo0I6FzsXq0+ba0WjB4YCiCZU9JLqh15F/mdEZNy1ACYE+I0B qPq4Ssz+iK/J+eJu6nff/NkdfEp6rYdZwfCVKcczyKz5fHXjpvVlG/Qm/dEw9ZL0xG 8PXHN37KmNVPmN5T23ck2GcUncr5vJ52nd5OFcXFUE5Goto+9up/68B7m4SIC6mV83 dUnBRd6UMVtOXc059f+OnYX0WXgqO/Uzy4tsZ8wr2OaUSvl2vGEki/eN5mj7meJO8a M72qqDynVfbDFqAmqr+C62uIaJhArxnrmC/9rNVTKL6uBLhc9SJ6BYF+yeJf+SxLKs ki60VRKb9D3jg== 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 09/23] powerpc/procfs: let procfs copy out reads of /proc/powerpc/systemcfg Date: Wed, 4 Nov 2026 20:37:50 +0100 Message-ID: <20261104-work-procfs-arch-v2-9-2aeb952c9597@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-input@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=1293; i=brauner@kernel.org; h=from:subject:message-id; bh=BKyq5EW+jipwXgvVj6hm7sFkYOn+uIZEAZe7arc6MQo=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWS97vjOI7W5OU2Ecf0JRpsD2T2N0rxx3fUCk8WEDn860 LbzeX1YRykLgxgXg6yYIotDu0m43HKeis1GmRowc1iZQIYwcHEKwERWv2T4Z/np554211z5HPtN Ea8e5coKrXxtW8d48eZXNxb/m5d+8jD8T260OtJsUDiLw3pdFscpPeXZpb3vZ9Y1ll1xmP9kwnc DJgA= 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/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