Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932208Ab2BPJLR (ORCPT ); Thu, 16 Feb 2012 04:11:17 -0500 Received: from mail-iy0-f174.google.com ([209.85.210.174]:53144 "EHLO mail-iy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932118Ab2BPJJq (ORCPT ); Thu, 16 Feb 2012 04:09:46 -0500 MIME-Version: 1.0 From: Grant Likely To: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, devicetree-discuss@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org, Benjamin Herrenschmidt , Thomas Gleixner , Milton Miller , Rob Herring Cc: Grant Likely Subject: [PATCH v5 18/27] irq_domain: constify irq_domain_ops Date: Thu, 16 Feb 2012 02:09:19 -0700 Message-Id: <1329383368-12122-19-git-send-email-grant.likely@secretlab.ca> X-Mailer: git-send-email 1.7.9 In-Reply-To: <1329383368-12122-1-git-send-email-grant.likely@secretlab.ca> References: <1329383368-12122-1-git-send-email-grant.likely@secretlab.ca> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 7182 Lines: 199 Make irq_domain_ops pointer a constant to make it safer for multiple instances to share the same ops pointer and change the irq_domain code so that it does not modify the ops. v4: Fix mismatched type reference in powerpc code Signed-off-by: Grant Likely Cc: Thomas Gleixner Cc: Benjamin Herrenschmidt Cc: Milton Miller Tested-by: Olof Johansson --- arch/powerpc/sysdev/mpic_msi.c | 2 +- include/linux/irqdomain.h | 14 +++++++------- kernel/irq/irqdomain.c | 31 +++++++++++++++---------------- 3 files changed, 23 insertions(+), 24 deletions(-) diff --git a/arch/powerpc/sysdev/mpic_msi.c b/arch/powerpc/sysdev/mpic_msi.c index 00395f4..0622aa9 100644 --- a/arch/powerpc/sysdev/mpic_msi.c +++ b/arch/powerpc/sysdev/mpic_msi.c @@ -32,7 +32,7 @@ void mpic_msi_reserve_hwirq(struct mpic *mpic, irq_hw_number_t hwirq) static int mpic_msi_reserve_u3_hwirqs(struct mpic *mpic) { irq_hw_number_t hwirq; - struct irq_domain_ops *ops = mpic->irqhost->ops; + const struct irq_domain_ops *ops = mpic->irqhost->ops; struct device_node *np; int flags, index, i; struct of_irq oirq; diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h index ea58f36..5245488 100644 --- a/include/linux/irqdomain.h +++ b/include/linux/irqdomain.h @@ -106,7 +106,7 @@ struct irq_domain { } linear; struct radix_tree_root tree; } revmap_data; - struct irq_domain_ops *ops; + const struct irq_domain_ops *ops; void *host_data; irq_hw_number_t inval_irq; @@ -119,17 +119,17 @@ struct irq_domain *irq_domain_add_legacy(struct device_node *of_node, unsigned int size, unsigned int first_irq, irq_hw_number_t first_hwirq, - struct irq_domain_ops *ops, + const struct irq_domain_ops *ops, void *host_data); struct irq_domain *irq_domain_add_linear(struct device_node *of_node, unsigned int size, - struct irq_domain_ops *ops, + const struct irq_domain_ops *ops, void *host_data); struct irq_domain *irq_domain_add_nomap(struct device_node *of_node, - struct irq_domain_ops *ops, + const struct irq_domain_ops *ops, void *host_data); struct irq_domain *irq_domain_add_tree(struct device_node *of_node, - struct irq_domain_ops *ops, + const struct irq_domain_ops *ops, void *host_data); extern struct irq_domain *irq_find_host(struct device_node *node); @@ -138,7 +138,7 @@ extern void irq_set_virq_count(unsigned int count); static inline struct irq_domain *irq_domain_add_legacy_isa( struct device_node *of_node, - struct irq_domain_ops *ops, + const struct irq_domain_ops *ops, void *host_data) { return irq_domain_add_legacy(of_node, NUM_ISA_INTERRUPTS, 0, 0, ops, @@ -162,7 +162,7 @@ extern unsigned int irq_radix_revmap_lookup(struct irq_domain *host, extern unsigned int irq_linear_revmap(struct irq_domain *host, irq_hw_number_t hwirq); -extern struct irq_domain_ops irq_domain_simple_ops; +extern const struct irq_domain_ops irq_domain_simple_ops; /* stock xlate functions */ int irq_domain_xlate_onecell(struct irq_domain *d, struct device_node *ctrlr, diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c index 9a8f95e..2d3dfff 100644 --- a/kernel/irq/irqdomain.c +++ b/kernel/irq/irqdomain.c @@ -26,11 +26,6 @@ static DEFINE_MUTEX(revmap_trees_mutex); static unsigned int irq_virq_count = NR_IRQS; static struct irq_domain *irq_default_domain; -static int default_irq_domain_match(struct irq_domain *d, struct device_node *np) -{ - return d->of_node != NULL && d->of_node == np; -} - /** * irq_domain_alloc() - Allocate a new irq_domain data structure * @of_node: optional device-tree node of the interrupt controller @@ -44,7 +39,7 @@ static int default_irq_domain_match(struct irq_domain *d, struct device_node *np */ static struct irq_domain *irq_domain_alloc(struct device_node *of_node, unsigned int revmap_type, - struct irq_domain_ops *ops, + const struct irq_domain_ops *ops, void *host_data) { struct irq_domain *domain; @@ -59,9 +54,6 @@ static struct irq_domain *irq_domain_alloc(struct device_node *of_node, domain->host_data = host_data; domain->of_node = of_node_get(of_node); - if (domain->ops->match == NULL) - domain->ops->match = default_irq_domain_match; - return domain; } @@ -104,7 +96,7 @@ struct irq_domain *irq_domain_add_legacy(struct device_node *of_node, unsigned int size, unsigned int first_irq, irq_hw_number_t first_hwirq, - struct irq_domain_ops *ops, + const struct irq_domain_ops *ops, void *host_data) { struct irq_domain *domain; @@ -170,7 +162,7 @@ struct irq_domain *irq_domain_add_legacy(struct device_node *of_node, */ struct irq_domain *irq_domain_add_linear(struct device_node *of_node, unsigned int size, - struct irq_domain_ops *ops, + const struct irq_domain_ops *ops, void *host_data) { struct irq_domain *domain; @@ -192,7 +184,7 @@ struct irq_domain *irq_domain_add_linear(struct device_node *of_node, } struct irq_domain *irq_domain_add_nomap(struct device_node *of_node, - struct irq_domain_ops *ops, + const struct irq_domain_ops *ops, void *host_data) { struct irq_domain *domain = irq_domain_alloc(of_node, @@ -211,7 +203,7 @@ struct irq_domain *irq_domain_add_nomap(struct device_node *of_node, * (the reverse mapping will use the slow path until that happens). */ struct irq_domain *irq_domain_add_tree(struct device_node *of_node, - struct irq_domain_ops *ops, + const struct irq_domain_ops *ops, void *host_data) { struct irq_domain *domain = irq_domain_alloc(of_node, @@ -230,6 +222,7 @@ struct irq_domain *irq_domain_add_tree(struct device_node *of_node, struct irq_domain *irq_find_host(struct device_node *node) { struct irq_domain *h, *found = NULL; + int rc; /* We might want to match the legacy controller last since * it might potentially be set to match all interrupts in @@ -237,11 +230,17 @@ struct irq_domain *irq_find_host(struct device_node *node) * yet though... */ mutex_lock(&irq_domain_mutex); - list_for_each_entry(h, &irq_domain_list, link) - if (h->ops->match(h, node)) { + list_for_each_entry(h, &irq_domain_list, link) { + if (h->ops->match) + rc = h->ops->match(h, node); + else + rc = (h->of_node != NULL) && (h->of_node == node); + + if (rc) { found = h; break; } + } mutex_unlock(&irq_domain_mutex); return found; } @@ -760,7 +759,7 @@ int irq_domain_xlate_onetwocell(struct irq_domain *d, } EXPORT_SYMBOL_GPL(irq_domain_xlate_onetwocell); -struct irq_domain_ops irq_domain_simple_ops = { +const struct irq_domain_ops irq_domain_simple_ops = { .map = irq_domain_simple_map, .xlate = irq_domain_xlate_onetwocell, }; -- 1.7.9 -- 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/