linux-kernel - [Questions]: how to extend nr

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Message-ID: <F297158F9216834BAB1B3BCC98DBDCCB42D277@mailsh.asrmicro.com>
Date:	Mon, 11 Jan 2016 11:18:09 +0800
From:	Zhou Qiao(周侨) <qiaozhou@...micro.com>
To:	<tglx@...utronix.de>, <jason@...edaemon.net>
Cc:	<linux-kernel@...r.kernel.org>
Subject: [Questions]: how to extend nr_irqs for arch arm64

Hi Thomas, Jason

I've a question about nr_irqs(with CONFIG_SPARSE_IRQ enabled) on arch arm64, and want to ask for your suggestions. 

The nr_irqs is set to NR_IRQS by default and NR_IRQS is small(64). Arch/arm platforms will re-set nr_irqs to a larger value. I didn't find similar way for arm64. The way I can think of is to redefine NR_IRQS. But according comments in include/asm-generic/irq.h, NR_IRQS should not be a large value. so what's the preferred way to extend nr_irqs, for arm64 specifically? Thanks in advance.

Best Regards
Qiao