Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932840Ab2EWGiR (ORCPT ); Wed, 23 May 2012 02:38:17 -0400 Received: from rcsinet15.oracle.com ([148.87.113.117]:32494 "EHLO rcsinet15.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965143Ab2EWGez (ORCPT ); Wed, 23 May 2012 02:34:55 -0400 From: Yinghai Lu To: Bjorn Helgaas Cc: Andrew Morton , Linus Torvalds , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Yinghai Lu Subject: [PATCH 05/11] resources: Split out __allocate_resource() Date: Tue, 22 May 2012 23:34:31 -0700 Message-Id: <1337754877-19759-6-git-send-email-yinghai@kernel.org> X-Mailer: git-send-email 1.7.7 In-Reply-To: <1337754877-19759-1-git-send-email-yinghai@kernel.org> References: <1337754877-19759-1-git-send-email-yinghai@kernel.org> X-Source-IP: acsinet21.oracle.com [141.146.126.237] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2479 Lines: 77 It will take bool lock, so we could use it in other functions that hold the resource lock. Signed-off-by: Yinghai Lu Cc: Andrew Morton --- kernel/resource.c | 26 +++++++++++++++++++++----- 1 files changed, 21 insertions(+), 5 deletions(-) diff --git a/kernel/resource.c b/kernel/resource.c index 51ade23..41d7050 100644 --- a/kernel/resource.c +++ b/kernel/resource.c @@ -521,14 +521,14 @@ out: * @alignf: alignment function, optional, called if not NULL * @alignf_data: arbitrary data to pass to the @alignf function */ -int allocate_resource(struct resource *root, struct resource *new, +static int __allocate_resource(struct resource *root, struct resource *new, resource_size_t size, resource_size_t min, resource_size_t max, resource_size_t align, resource_size_t (*alignf)(void *, const struct resource *, resource_size_t, resource_size_t), - void *alignf_data) + void *alignf_data, bool lock) { int err; struct resource_constraint constraint; @@ -542,19 +542,35 @@ int allocate_resource(struct resource *root, struct resource *new, constraint.alignf = alignf; constraint.alignf_data = alignf_data; - if ( new->parent ) { + if (new->parent && lock) { /* resource is already allocated, try reallocating with the new constraints */ return reallocate_resource(root, new, size, &constraint); } - write_lock(&resource_lock); + if (lock) + write_lock(&resource_lock); err = find_resource(root, new, size, &constraint); if (err >= 0 && __request_resource(root, new)) err = -EBUSY; - write_unlock(&resource_lock); + if (lock) + write_unlock(&resource_lock); return err; } +int allocate_resource(struct resource *root, struct resource *new, + resource_size_t size, resource_size_t min, + resource_size_t max, resource_size_t align, + resource_size_t (*alignf)(void *, + const struct resource *, + resource_size_t, + resource_size_t), + void *alignf_data) +{ + bool lock = true; + + return __allocate_resource(root, new, size, min, max, align, + alignf, alignf_data, lock); +} EXPORT_SYMBOL(allocate_resource); -- 1.7.7 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/