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Date: Fri, 19 Dec 2014 06:06:23 -0800
From: tip-bot for Yinghai Lu <tipbot@...or.com>
To: linux-tip-commits@...r.kernel.org
Cc: benh@...nel.crashing.org, gregkh@...uxfoundation.org,
prarit@...hat.com, rjw@...ysocki.net, grant.likely@...aro.org,
yinghai@...nel.org, sebastian@...akpoint.cc,
linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org,
konrad.wilk@...cle.com, joro@...tes.org, rdunlap@...radead.org,
bhelgaas@...gle.com, tony.luck@...el.com,
jiang.liu@...ux.intel.com, bp@...en8.de, tglx@...utronix.de
Subject: [tip:x86/apic] x86, irq: Convert irq_2_pin list to generic list
Commit-ID: a178b87b20803aa1cf991f39616e51f4939fbcaf
Gitweb: http://git.kernel.org/tip/a178b87b20803aa1cf991f39616e51f4939fbcaf
Author: Yinghai Lu <yinghai@...nel.org>
AuthorDate: Mon, 27 Oct 2014 16:11:55 +0800
Committer: Thomas Gleixner <tglx@...utronix.de>
CommitDate: Tue, 16 Dec 2014 14:08:16 +0100
x86, irq: Convert irq_2_pin list to generic list
Use generic list to replace private list implementation so we can use
the existing helper functions.
Signed-off-by: Yinghai Lu <yinghai@...nel.org>
Signed-off-by: Jiang Liu <jiang.liu@...ux.intel.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Cc: Tony Luck <tony.luck@...el.com>
Cc: Joerg Roedel <joro@...tes.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Sebastian Andrzej Siewior <sebastian@...akpoint.cc>
Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc: Rafael J. Wysocki <rjw@...ysocki.net>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>
Cc: Randy Dunlap <rdunlap@...radead.org>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Prarit Bhargava <prarit@...hat.com>
Cc: Grant Likely <grant.likely@...aro.org>
Link: http://lkml.kernel.org/r/1414397531-28254-5-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Cc: Sebastian Andrzej Siewior <sebastian@...akpoint.cc>
Cc: Joerg Roedel <joro@...tes.org>
---
arch/x86/include/asm/hw_irq.h | 2 +-
arch/x86/kernel/apic/io_apic.c | 28 +++++++++++-----------------
2 files changed, 12 insertions(+), 18 deletions(-)
diff --git a/arch/x86/include/asm/hw_irq.h b/arch/x86/include/asm/hw_irq.h
index b12c45c..66e59e6 100644
--- a/arch/x86/include/asm/hw_irq.h
+++ b/arch/x86/include/asm/hw_irq.h
@@ -138,7 +138,7 @@ struct irq_2_irte {
* Most irqs are mapped 1:1 with pins.
*/
struct irq_cfg {
- struct irq_pin_list *irq_2_pin;
+ struct list_head irq_2_pin;
cpumask_var_t domain;
cpumask_var_t old_domain;
u8 vector;
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 447186a..1197840 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -74,7 +74,7 @@
for_each_pin((idx), (pin))
#define for_each_irq_pin(entry, head) \
- for (entry = head; entry; entry = entry->next)
+ list_for_each_entry(entry, &head, list)
/*
* Is the SiS APIC rmw bug present ?
@@ -229,8 +229,8 @@ void mp_save_irq(struct mpc_intsrc *m)
}
struct irq_pin_list {
+ struct list_head list;
int apic, pin;
- struct irq_pin_list *next;
};
static struct irq_pin_list *alloc_irq_pin_list(int node)
@@ -297,6 +297,7 @@ static struct irq_cfg *alloc_irq_cfg(unsigned int irq, int node)
goto out_cfg;
if (!zalloc_cpumask_var_node(&cfg->old_domain, GFP_KERNEL, node))
goto out_domain;
+ INIT_LIST_HEAD(&cfg->irq_2_pin);
return cfg;
out_domain:
free_cpumask_var(cfg->domain);
@@ -460,15 +461,12 @@ static void ioapic_mask_entry(int apic, int pin)
*/
static int __add_pin_to_irq_node(struct irq_cfg *cfg, int node, int apic, int pin)
{
- struct irq_pin_list **last, *entry;
+ struct irq_pin_list *entry;
/* don't allow duplicates */
- last = &cfg->irq_2_pin;
- for_each_irq_pin(entry, cfg->irq_2_pin) {
+ for_each_irq_pin(entry, cfg->irq_2_pin)
if (entry->apic == apic && entry->pin == pin)
return 0;
- last = &entry->next;
- }
entry = alloc_irq_pin_list(node);
if (!entry) {
@@ -479,22 +477,19 @@ static int __add_pin_to_irq_node(struct irq_cfg *cfg, int node, int apic, int pi
entry->apic = apic;
entry->pin = pin;
- *last = entry;
+ list_add_tail(&entry->list, &cfg->irq_2_pin);
return 0;
}
static void __remove_pin_from_irq(struct irq_cfg *cfg, int apic, int pin)
{
- struct irq_pin_list **last, *entry;
+ struct irq_pin_list *tmp, *entry;
- last = &cfg->irq_2_pin;
- for_each_irq_pin(entry, cfg->irq_2_pin)
+ list_for_each_entry_safe(entry, tmp, &cfg->irq_2_pin, list)
if (entry->apic == apic && entry->pin == pin) {
- *last = entry->next;
+ list_del(&entry->list);
kfree(entry);
return;
- } else {
- last = &entry->next;
}
}
@@ -1739,8 +1734,7 @@ __apicdebuginit(void) print_IO_APICs(void)
cfg = irq_cfg(irq);
if (!cfg)
continue;
- entry = cfg->irq_2_pin;
- if (!entry)
+ if (list_empty(&cfg->irq_2_pin))
continue;
printk(KERN_DEBUG "IRQ%d ", irq);
for_each_irq_pin(entry, cfg->irq_2_pin)
@@ -4076,7 +4070,7 @@ void mp_irqdomain_unmap(struct irq_domain *domain, unsigned int virq)
ioapic_mask_entry(ioapic, pin);
__remove_pin_from_irq(cfg, ioapic, pin);
- WARN_ON(cfg->irq_2_pin != NULL);
+ WARN_ON(!list_empty(&cfg->irq_2_pin));
arch_teardown_hwirq(virq);
}
--
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