From patchwork Mon Jan 24 23:28:14 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rafael Wysocki X-Patchwork-Id: 503501 Received: from smtp1.linux-foundation.org (smtp1.linux-foundation.org [140.211.169.13]) by demeter1.kernel.org (8.14.4/8.14.3) with ESMTP id p0ONatOd023871 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=FAIL) for ; Mon, 24 Jan 2011 23:37:15 GMT Received: from daredevil.linux-foundation.org (localhost [127.0.0.1]) by smtp1.linux-foundation.org (8.14.2/8.13.5/Debian-3ubuntu1.1) with ESMTP id p0ONZQS5017548; Mon, 24 Jan 2011 15:35:27 -0800 Received: from ogre.sisk.pl (ogre.sisk.pl [217.79.144.158]) by smtp1.linux-foundation.org (8.14.2/8.13.5/Debian-3ubuntu1.1) with ESMTP id p0ONXDv4016994 for ; Mon, 24 Jan 2011 15:33:14 -0800 Received: from localhost (localhost.localdomain [127.0.0.1]) by ogre.sisk.pl (Postfix) with ESMTP id A997B1A3239; Tue, 25 Jan 2011 00:35:48 +0100 (CET) Received: from ogre.sisk.pl ([127.0.0.1]) by localhost (ogre.sisk.pl [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 07760-09; Tue, 25 Jan 2011 00:35:09 +0100 (CET) Received: from ferrari.rjw.lan (220-bem-13.acn.waw.pl [82.210.184.220]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ogre.sisk.pl (Postfix) with ESMTP id 2A45F1A320E; Tue, 25 Jan 2011 00:35:09 +0100 (CET) From: "Rafael J. Wysocki" To: Len Brown Date: Tue, 25 Jan 2011 00:28:14 +0100 User-Agent: KMail/1.13.5 (Linux/2.6.38-rc1+; KDE/4.4.4; x86_64; ; ) References: <201101201226.41021.rjw@sisk.pl> <201101250025.10817.rjw@sisk.pl> In-Reply-To: <201101250025.10817.rjw@sisk.pl> MIME-Version: 1.0 Message-Id: <201101250028.14992.rjw@sisk.pl> X-Virus-Scanned: amavisd-new at ogre.sisk.pl using MkS_Vir for Linux Received-SPF: pass (localhost is always allowed.) X-Spam-Status: No, hits=-3.939 required=5 tests=AWL, BAYES_00, OSDL_HEADER_SUBJECT_BRACKETED X-Spam-Checker-Version: SpamAssassin 3.2.4-osdl_revision__1.47__ X-MIMEDefang-Filter: lf$Revision: 1.188 $ X-Scanned-By: MIMEDefang 2.63 on 140.211.169.21 Cc: ACPI Devel Maling List , Linux-pm mailing list , LKML , Jeff Chua Subject: [linux-pm] [PATCH 3/8] ACPI: Change acpi_ioremap_lock into a mutex X-BeenThere: linux-pm@lists.linux-foundation.org X-Mailman-Version: 2.1.9 Precedence: list List-Id: Linux power management List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-pm-bounces@lists.linux-foundation.org Errors-To: linux-pm-bounces@lists.linux-foundation.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter1.kernel.org [140.211.167.41]); Mon, 24 Jan 2011 23:37:15 +0000 (UTC) Index: linux-2.6/drivers/acpi/osl.c =================================================================== --- linux-2.6.orig/drivers/acpi/osl.c +++ linux-2.6/drivers/acpi/osl.c @@ -109,7 +109,7 @@ struct acpi_ioremap { }; static LIST_HEAD(acpi_ioremaps); -static DEFINE_SPINLOCK(acpi_ioremap_lock); +static DEFINE_MUTEX(acpi_ioremap_lock); static void __init acpi_osi_setup_late(void); @@ -303,7 +303,6 @@ void __iomem *__init_refok acpi_os_map_memory(acpi_physical_address phys, acpi_size size) { struct acpi_ioremap *map, *tmp_map; - unsigned long flags; void __iomem *virt; acpi_physical_address pg_off; acpi_size pg_sz; @@ -334,18 +333,18 @@ acpi_os_map_memory(acpi_physical_address map->size = pg_sz; kref_init(&map->ref); - spin_lock_irqsave(&acpi_ioremap_lock, flags); + mutex_lock(&acpi_ioremap_lock); /* Check if page has already been mapped. */ tmp_map = acpi_map_lookup(phys, size); if (tmp_map) { kref_get(&tmp_map->ref); - spin_unlock_irqrestore(&acpi_ioremap_lock, flags); + mutex_unlock(&acpi_ioremap_lock); iounmap(map->virt); kfree(map); return tmp_map->virt + (phys - tmp_map->phys); } list_add_tail_rcu(&map->list, &acpi_ioremaps); - spin_unlock_irqrestore(&acpi_ioremap_lock, flags); + mutex_unlock(&acpi_ioremap_lock); return map->virt + (phys - map->phys); } @@ -362,7 +361,6 @@ static void acpi_kref_del_iomap(struct k void __ref acpi_os_unmap_memory(void __iomem *virt, acpi_size size) { struct acpi_ioremap *map; - unsigned long flags; int del; if (!acpi_gbl_permanent_mmap) { @@ -370,17 +368,17 @@ void __ref acpi_os_unmap_memory(void __i return; } - spin_lock_irqsave(&acpi_ioremap_lock, flags); + mutex_lock(&acpi_ioremap_lock); map = acpi_map_lookup_virt(virt, size); if (!map) { - spin_unlock_irqrestore(&acpi_ioremap_lock, flags); + mutex_unlock(&acpi_ioremap_lock); printk(KERN_ERR PREFIX "%s: bad address %p\n", __func__, virt); dump_stack(); return; } del = kref_put(&map->ref, acpi_kref_del_iomap); - spin_unlock_irqrestore(&acpi_ioremap_lock, flags); + mutex_unlock(&acpi_ioremap_lock); if (!del) return; @@ -417,7 +415,6 @@ static int acpi_os_map_generic_address(s static void acpi_os_unmap_generic_address(struct acpi_generic_address *addr) { void __iomem *virt; - unsigned long flags; acpi_size size = addr->bit_width / 8; if (addr->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) @@ -426,9 +423,9 @@ static void acpi_os_unmap_generic_addres if (!addr->address || !addr->bit_width) return; - spin_lock_irqsave(&acpi_ioremap_lock, flags); + mutex_lock(&acpi_ioremap_lock); virt = acpi_map_vaddr_lookup(addr->address, size); - spin_unlock_irqrestore(&acpi_ioremap_lock, flags); + mutex_unlock(&acpi_ioremap_lock); acpi_os_unmap_memory(virt, size); }