From patchwork Thu Dec 13 22:21:57 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rafael Wysocki X-Patchwork-Id: 1876551 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: X-Original-To: patchwork-linux-pci@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork2.kernel.org (Postfix) with ESMTP id 20E38E0147 for ; Thu, 13 Dec 2012 22:20:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750772Ab2LMWUB (ORCPT ); Thu, 13 Dec 2012 17:20:01 -0500 Received: from hydra.sisk.pl ([212.160.235.94]:32822 "EHLO hydra.sisk.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750755Ab2LMWSc (ORCPT ); Thu, 13 Dec 2012 17:18:32 -0500 Received: from vostro.rjw.lan (afbc176.neoplus.adsl.tpnet.pl [95.49.28.176]) by hydra.sisk.pl (Postfix) with ESMTPSA id A7DD0E3FF2; Thu, 13 Dec 2012 23:19:58 +0100 (CET) From: "Rafael J. Wysocki" To: ACPI Devel Maling List Cc: Bjorn Helgaas , LKML , linux-pci@vger.kernel.org, Yinghai Lu , Toshi Kani , Myron Stowe , Yijing Wang , Jiang Liu Subject: [PATCH rev.2 4/6] ACPI: Reduce the usage of struct acpi_bus_ops Date: Thu, 13 Dec 2012 23:21:57 +0100 Message-ID: <1597613.RyAsvSHuB3@vostro.rjw.lan> User-Agent: KMail/4.9.3 (Linux/3.7.0; KDE/4.9.3; x86_64; ; ) In-Reply-To: <1499423.ez5cZl2uAf@vostro.rjw.lan> References: <8498184.VilrUmatxI@vostro.rjw.lan> <1499423.ez5cZl2uAf@vostro.rjw.lan> MIME-Version: 1.0 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From: Rafael J. Wysocki Objects of type struct acpi_bus_ops are currently used to pass information between different parts of the ACPI namespace scanning code, sometimes in quite convoluted ways. It turns out that that is not necessary in some cases, so simplify the code by reducing the utilization of struct acpi_bus_ops objects where clearly possible. Signed-off-by: Rafael J. Wysocki --- drivers/acpi/scan.c | 40 ++++++++++++++++------------------------ 1 file changed, 16 insertions(+), 24 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Index: linux/drivers/acpi/scan.c =================================================================== --- linux.orig/drivers/acpi/scan.c +++ linux/drivers/acpi/scan.c @@ -1527,7 +1527,6 @@ end: static void acpi_bus_add_power_resource(acpi_handle handle) { struct acpi_bus_ops ops = { - .acpi_op_add = 1, .acpi_op_start = 1, .acpi_op_match = 1, }; @@ -1581,7 +1580,6 @@ static int acpi_bus_type_and_status(acpi static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl, void *context, void **return_value) { - struct acpi_bus_ops *ops = context; struct acpi_device *device = NULL; int type; unsigned long long sta; @@ -1605,11 +1603,13 @@ static acpi_status acpi_bus_check_add(ac } acpi_bus_get_device(handle, &device); - if (ops->acpi_op_add && !device) { - struct acpi_bus_ops add_ops = *ops; + if (!device) { + struct acpi_bus_ops ops = { + .acpi_op_start = !!context, + .acpi_op_match = 0, + }; - add_ops.acpi_op_match = 0; - acpi_add_single_object(&device, handle, type, sta, &add_ops); + acpi_add_single_object(&device, handle, type, sta, &ops); if (!device) return AE_CTRL_DEPTH; @@ -1652,17 +1652,18 @@ static acpi_status acpi_bus_device_attac return status; } -static int acpi_bus_scan(acpi_handle handle, struct acpi_bus_ops *ops, +static int acpi_bus_scan(acpi_handle handle, bool start, struct acpi_device **child) { void *device = NULL; acpi_status status; int ret = -ENODEV; - status = acpi_bus_check_add(handle, 0, ops, &device); + status = acpi_bus_check_add(handle, 0, (void *)start, &device); if (ACPI_SUCCESS(status)) acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, - acpi_bus_check_add, NULL, ops, &device); + acpi_bus_check_add, NULL, (void *)start, + &device); if (!device) goto out; @@ -1696,9 +1697,7 @@ int acpi_bus_add(struct acpi_device **child, struct acpi_device *parent, acpi_handle handle, int type) { - struct acpi_bus_ops ops = { .acpi_op_add = 1, }; - - return acpi_bus_scan(handle, &ops, child); + return acpi_bus_scan(handle, false, child); } EXPORT_SYMBOL(acpi_bus_add); @@ -1796,12 +1795,10 @@ static int acpi_bus_scan_fixed(void) { int result = 0; struct acpi_device *device = NULL; - struct acpi_bus_ops ops; - - memset(&ops, 0, sizeof(ops)); - ops.acpi_op_add = 1; - ops.acpi_op_start = 1; - ops.acpi_op_match = 1; + struct acpi_bus_ops ops = { + .acpi_op_start = 1, + .acpi_op_match = 1, + }; /* * Enumerate all fixed-feature devices. @@ -1827,11 +1824,6 @@ static int acpi_bus_scan_fixed(void) int __init acpi_scan_init(void) { int result; - struct acpi_bus_ops ops; - - memset(&ops, 0, sizeof(ops)); - ops.acpi_op_add = 1; - ops.acpi_op_start = 1; result = bus_register(&acpi_bus_type); if (result) { @@ -1845,7 +1837,7 @@ int __init acpi_scan_init(void) /* * Enumerate devices in the ACPI namespace. */ - result = acpi_bus_scan(ACPI_ROOT_OBJECT, &ops, &acpi_root); + result = acpi_bus_scan(ACPI_ROOT_OBJECT, true, &acpi_root); if (!result) result = acpi_bus_scan_fixed();