[Xen-changelog] [xen master] ARM: make nr_irqs a constant

[patchbot@xxxxxxx]

commit 5eaa17357bbef0ae4962daa369573b4dbdee7e83
Author:     Andre Przywara <andre.przywara@xxxxxxxxxx>
AuthorDate: Tue Feb 6 17:09:03 2018 +0000
Commit:     Stefano Stabellini <sstabellini@xxxxxxxxxx>
CommitDate: Thu Feb 8 13:18:12 2018 -0800

    ARM: make nr_irqs a constant
    
    On ARM the maximum number of IRQs is a constant, but we share it being
    a variable to match x86. Since we are not supposed to alter it, let's
    mark it as "const" to avoid accidental change.
    
    Suggested-by: Julien Grall <julien.grall@xxxxxxx>
    Signed-off-by: Andre Przywara <andre.przywara@xxxxxxxxxx>
    Acked-by: Julien Grall <julien.grall@xxxxxxx>
---
 xen/arch/arm/irq.c        | 2 +-
 xen/include/asm-arm/irq.h | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/xen/arch/arm/irq.c b/xen/arch/arm/irq.c
index 62103a2..29af10e 100644
--- a/xen/arch/arm/irq.c
+++ b/xen/arch/arm/irq.c
@@ -27,7 +27,7 @@
 #include <asm/gic.h>
 #include <asm/vgic.h>
 
-unsigned int __read_mostly nr_irqs = NR_IRQS;
+const unsigned int nr_irqs = NR_IRQS;
 
 static unsigned int local_irqs_type[NR_LOCAL_IRQS];
 static DEFINE_SPINLOCK(local_irqs_type_lock);
diff --git a/xen/include/asm-arm/irq.h b/xen/include/asm-arm/irq.h
index 0d110ec..9d55e9b 100644
--- a/xen/include/asm-arm/irq.h
+++ b/xen/include/asm-arm/irq.h
@@ -34,7 +34,7 @@ struct arch_irq_desc {
 /* This is a spurious interrupt ID which never makes it into the GIC code. */
 #define INVALID_IRQ     1023
 
-extern unsigned int nr_irqs;
+extern const unsigned int nr_irqs;
 #define nr_static_irqs NR_IRQS
 #define arch_hwdom_irqs(domid) NR_IRQS
 
--
generated by git-patchbot for /home/xen/git/xen.git#master

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