From: Andre Przywara Date: Tue, 6 Feb 2018 17:09:03 +0000 (+0000) Subject: ARM: make nr_irqs a constant X-Git-Tag: archive/raspbian/4.11.1-1+rpi1~1^2~66^2~600 X-Git-Url: https://dgit.raspbian.org/%22http://www.example.com/cgi/%22/%22http:/www.example.com/cgi/%22?a=commitdiff_plain;h=5eaa17357bbef0ae4962daa369573b4dbdee7e83;p=xen.git 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 Signed-off-by: Andre Przywara Acked-by: Julien Grall --- diff --git a/xen/arch/arm/irq.c b/xen/arch/arm/irq.c index 62103a20e3..29af10e82c 100644 --- a/xen/arch/arm/irq.c +++ b/xen/arch/arm/irq.c @@ -27,7 +27,7 @@ #include #include -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 0d110ecb08..9d55e9b122 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