linux-kernel - [PATCH 5/9] x86/io_apic: add get_nr_irqs

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Message-Id: <5b0148b366eaa87072ab261f71c4c545be8e607f.1234573847.git.jeremy.fitzhardinge@citrix.com>
Date:	Fri, 13 Feb 2009 17:12:03 -0800
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	the arch/x86 maintainers <x86@...nel.org>,
	Xen-devel <xen-devel@...ts.xensource.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Yinghai Lu <yinghai@...nel.org>,
	Ian Campbell <Ian.Campbell@...rix.com>,
	Jeremy Fitzhardinge <jeremy@...builder (none) >,
	Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>
Subject: [PATCH 5/9] x86/io_apic: add get_nr_irqs_gsi()

From: Jeremy Fitzhardinge <jeremy@...builder.(none)>

Add get_nr_irqs_gsi() to return nr_irqs_gsi.  Xen will use this to
determine how many irqs it needs to reserve for hardware irqs.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>
---
 arch/x86/include/asm/io_apic.h |    1 +
 arch/x86/kernel/io_apic.c      |    5 +++++
 2 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/arch/x86/include/asm/io_apic.h b/arch/x86/include/asm/io_apic.h
index 20b543a..10a7a43 100644
--- a/arch/x86/include/asm/io_apic.h
+++ b/arch/x86/include/asm/io_apic.h
@@ -168,6 +168,7 @@ extern void reinit_intr_remapped_IO_APIC(int);
 #endif
 
 extern void probe_nr_irqs_gsi(void);
+extern int get_nr_irqs_gsi(void);
 
 extern int setup_ioapic_entry(int apic, int irq,
 			      struct IO_APIC_route_entry *entry,
diff --git a/arch/x86/kernel/io_apic.c b/arch/x86/kernel/io_apic.c
index de0368a..f66c093 100644
--- a/arch/x86/kernel/io_apic.c
+++ b/arch/x86/kernel/io_apic.c
@@ -3865,6 +3865,11 @@ void __init probe_nr_irqs_gsi(void)
 	printk(KERN_DEBUG "nr_irqs_gsi: %d\n", nr_irqs_gsi);
 }
 
+int get_nr_irqs_gsi(void)
+{
+	return nr_irqs_gsi;
+}
+
 #ifdef CONFIG_SPARSE_IRQ
 int __init arch_probe_nr_irqs(void)
 {
-- 
1.6.0.6

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