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Date: Wed, 3 Jun 2015 11:47:50 +0800
From: Jiang Liu <jiang.liu@...ux.intel.com>
To: Thomas Gleixner <tglx@...utronix.de>,
Bjorn Helgaas <bhelgaas@...gle.com>,
Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Ingo Molnar <mingo@...hat.com>,
"H. Peter Anvin" <hpa@...or.com>,
Randy Dunlap <rdunlap@...radead.org>,
Yinghai Lu <yinghai@...nel.org>,
Borislav Petkov <bp@...en8.de>, x86@...nel.org,
Jiang Liu <jiang.liu@...ux.intel.com>,
Jason Cooper <jason@...edaemon.net>,
Kevin Cernekee <cernekee@...il.com>,
Arnd Bergmann <arnd@...db.de>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
Tony Luck <tony.luck@...el.com>, linux-kernel@...r.kernel.org,
linux-pci@...r.kernel.org, linux-acpi@...r.kernel.org
Subject: [Patch v3 31/36] genirq: Move field 'affinity' from struct irq_data into struct irq_common_data
Irq affinity mask is per-irq instead of per irqchip, so move it into
struct irq_common_data.
Signed-off-by: Jiang Liu <jiang.liu@...ux.intel.com>
---
Hi Thomas,
This version changes the patch to correctly support bisecting.
Thanks!
Gerry
---
arch/x86/kernel/apic/vector.c | 4 +---
include/linux/irq.h | 12 ++++++------
kernel/irq/irqdesc.c | 9 +++++----
kernel/irq/manage.c | 12 ++++++------
kernel/irq/proc.c | 2 +-
5 files changed, 19 insertions(+), 20 deletions(-)
diff --git a/arch/x86/kernel/apic/vector.c b/arch/x86/kernel/apic/vector.c
index 7ad911ea4f56..dfa3a5f5b3d3 100644
--- a/arch/x86/kernel/apic/vector.c
+++ b/arch/x86/kernel/apic/vector.c
@@ -494,10 +494,8 @@ static int apic_set_affinity(struct irq_data *irq_data,
err = assign_irq_vector(irq, data, dest);
if (err) {
- struct irq_data *top = irq_get_irq_data(irq);
-
if (assign_irq_vector(irq, data,
- irq_data_get_affinity_mask(top)))
+ irq_data_get_affinity_mask(irq_data)))
pr_err("Failed to recover vector for irq %d\n", irq);
return err;
}
diff --git a/include/linux/irq.h b/include/linux/irq.h
index 91fbf10bdae0..9d01cd8ca8a2 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -110,8 +110,8 @@ enum {
/*
* Return value for chip->irq_set_affinity()
*
- * IRQ_SET_MASK_OK - OK, core updates irq_data.affinity
- * IRQ_SET_MASK_NOCPY - OK, chip did update irq_data.affinity
+ * IRQ_SET_MASK_OK - OK, core updates irq_common_data.affinity
+ * IRQ_SET_MASK_NOCPY - OK, chip did update irq_common_data.affinity
* IRQ_SET_MASK_OK_DONE - Same as IRQ_SET_MASK_OK for core. Special code to
* support stacked irqchips, which indicates skipping
* all descendent irqchips.
@@ -131,6 +131,7 @@ struct irq_domain;
* Use accessor functions to deal with it
* @node: node index useful for balancing
* @handler_data: per-IRQ data for the irq_chip methods
+ * @affinity: IRQ affinity on SMP
*/
struct irq_common_data {
unsigned int state_use_accessors;
@@ -138,6 +139,7 @@ struct irq_common_data {
unsigned int node;
#endif
void *handler_data;
+ cpumask_var_t affinity;
};
/**
@@ -154,7 +156,6 @@ struct irq_common_data {
* @chip_data: platform-specific per-chip private data for the chip
* methods, to allow shared chip implementations
* @msi_desc: MSI descriptor
- * @affinity: IRQ affinity on SMP
*
* The fields here need to overlay the ones in irq_desc until we
* cleaned up the direct references and switched everything over to
@@ -172,7 +173,6 @@ struct irq_data {
#endif
void *chip_data;
struct msi_desc *msi_desc;
- cpumask_var_t affinity;
};
/*
@@ -660,12 +660,12 @@ static inline struct cpumask *irq_get_affinity_mask(int irq)
{
struct irq_data *d = irq_get_irq_data(irq);
- return d ? d->affinity : NULL;
+ return d ? d->common->affinity : NULL;
}
static inline struct cpumask *irq_data_get_affinity_mask(struct irq_data *d)
{
- return d->affinity;
+ return d->common->affinity;
}
unsigned int arch_dynirq_lower_bound(unsigned int from);
diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
index 7f881792ad5f..2c39a203f78b 100644
--- a/kernel/irq/irqdesc.c
+++ b/kernel/irq/irqdesc.c
@@ -38,12 +38,13 @@ static void __init init_irq_default_affinity(void)
#ifdef CONFIG_SMP
static int alloc_masks(struct irq_desc *desc, gfp_t gfp, int node)
{
- if (!zalloc_cpumask_var_node(&desc->irq_data.affinity, gfp, node))
+ if (!zalloc_cpumask_var_node(&desc->irq_common_data.affinity,
+ gfp, node))
return -ENOMEM;
#ifdef CONFIG_GENERIC_PENDING_IRQ
if (!zalloc_cpumask_var_node(&desc->pending_mask, gfp, node)) {
- free_cpumask_var(desc->irq_data.affinity);
+ free_cpumask_var(desc->irq_common_data.affinity);
return -ENOMEM;
}
#endif
@@ -52,7 +53,7 @@ static int alloc_masks(struct irq_desc *desc, gfp_t gfp, int node)
static void desc_smp_init(struct irq_desc *desc, int node)
{
- cpumask_copy(desc->irq_data.affinity, irq_default_affinity);
+ cpumask_copy(desc->irq_common_data.affinity, irq_default_affinity);
#ifdef CONFIG_GENERIC_PENDING_IRQ
cpumask_clear(desc->pending_mask);
#endif
@@ -124,7 +125,7 @@ static void free_masks(struct irq_desc *desc)
#ifdef CONFIG_GENERIC_PENDING_IRQ
free_cpumask_var(desc->pending_mask);
#endif
- free_cpumask_var(desc->irq_data.affinity);
+ free_cpumask_var(desc->irq_common_data.affinity);
}
#else
static inline void free_masks(struct irq_desc *desc) { }
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index f9744853b656..e7688140bfb6 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -190,7 +190,7 @@ int irq_do_set_affinity(struct irq_data *data, const struct cpumask *mask,
switch (ret) {
case IRQ_SET_MASK_OK:
case IRQ_SET_MASK_OK_DONE:
- cpumask_copy(data->affinity, mask);
+ cpumask_copy(desc->irq_common_data.affinity, mask);
case IRQ_SET_MASK_OK_NOCOPY:
irq_set_thread_affinity(desc);
ret = 0;
@@ -302,7 +302,7 @@ static void irq_affinity_notify(struct work_struct *work)
if (irq_move_pending(&desc->irq_data))
irq_get_pending(cpumask, desc);
else
- cpumask_copy(cpumask, desc->irq_data.affinity);
+ cpumask_copy(cpumask, desc->irq_common_data.affinity);
raw_spin_unlock_irqrestore(&desc->lock, flags);
notify->notify(notify, cpumask);
@@ -374,9 +374,9 @@ setup_affinity(unsigned int irq, struct irq_desc *desc, struct cpumask *mask)
* one of the targets is online.
*/
if (irqd_has_set(&desc->irq_data, IRQD_AFFINITY_SET)) {
- if (cpumask_intersects(desc->irq_data.affinity,
+ if (cpumask_intersects(desc->irq_common_data.affinity,
cpu_online_mask))
- set = desc->irq_data.affinity;
+ set = desc->irq_common_data.affinity;
else
irqd_clear(&desc->irq_data, IRQD_AFFINITY_SET);
}
@@ -827,8 +827,8 @@ irq_thread_check_affinity(struct irq_desc *desc, struct irqaction *action)
* This code is triggered unconditionally. Check the affinity
* mask pointer. For CPU_MASK_OFFSTACK=n this is optimized out.
*/
- if (desc->irq_data.affinity)
- cpumask_copy(mask, desc->irq_data.affinity);
+ if (desc->irq_common_data.affinity)
+ cpumask_copy(mask, desc->irq_common_data.affinity);
else
valid = false;
raw_spin_unlock_irq(&desc->lock);
diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c
index 0e97c142ce40..e3a8c9577ba6 100644
--- a/kernel/irq/proc.c
+++ b/kernel/irq/proc.c
@@ -39,7 +39,7 @@ static struct proc_dir_entry *root_irq_dir;
static int show_irq_affinity(int type, struct seq_file *m, void *v)
{
struct irq_desc *desc = irq_to_desc((long)m->private);
- const struct cpumask *mask = desc->irq_data.affinity;
+ const struct cpumask *mask = desc->irq_common_data.affinity;
#ifdef CONFIG_GENERIC_PENDING_IRQ
if (irqd_is_setaffinity_pending(&desc->irq_data))
--
1.7.10.4
--
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