lkml.org 
[lkml]   [2014]   [Sep]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[Patch v5 06/15] x86, irq: Split out alloc_ioapic_save_registers()
Date
From: Yinghai Lu <yinghai@kernel.org>

Split out alloc_ioapic_save_registers() from early_irq_init(),
so it could be used for ioapic hotplug later.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
---
arch/x86/kernel/apic/io_apic.c | 22 +++++++++++++++-------
1 file changed, 15 insertions(+), 7 deletions(-)

diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 337ce5a9b15c..003945e71616 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -237,6 +237,19 @@ static struct irq_pin_list *alloc_irq_pin_list(int node)
return kzalloc_node(sizeof(struct irq_pin_list), GFP_KERNEL, node);
}

+static void alloc_ioapic_saved_registers(int idx)
+{
+ size_t size;
+
+ if (ioapics[idx].saved_registers)
+ return;
+
+ size = sizeof(struct IO_APIC_route_entry) * ioapics[idx].nr_registers;
+ ioapics[idx].saved_registers = kzalloc(size, GFP_KERNEL);
+ if (!ioapics[idx].saved_registers)
+ pr_err("IOAPIC %d: suspend/resume impossible!\n", idx);
+}
+
int __init arch_early_irq_init(void)
{
struct irq_cfg *cfg;
@@ -245,13 +258,8 @@ int __init arch_early_irq_init(void)
if (!nr_legacy_irqs())
io_apic_irqs = ~0UL;

- for_each_ioapic(i) {
- ioapics[i].saved_registers =
- kzalloc(sizeof(struct IO_APIC_route_entry) *
- ioapics[i].nr_registers, GFP_KERNEL);
- if (!ioapics[i].saved_registers)
- pr_err("IOAPIC %d: suspend/resume impossible!\n", i);
- }
+ for_each_ioapic(i)
+ alloc_ioapic_saved_registers(i);

/*
* For legacy IRQ's, start with assigning irq0 to irq15 to
--
1.7.10.4


\
 
 \ /
  Last update: 2014-09-11 10:41    [W:0.100 / U:9.536 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site