linux-kernel - Re: [PATCH v3 2/3] x86/platform/intel-mid: Allocate RTC interrupt for Merrifield

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Message-ID: <alpine.DEB.2.20.1701191746580.3428@nanos>
Date:   Thu, 19 Jan 2017 17:54:09 +0100 (CET)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
cc:     Ingo Molnar <mingo@...hat.com>, "H . Peter Anvin" <hpa@...or.com>,
        linux-kernel@...r.kernel.org, x86@...nel.org,
        "Luis R . Rodriguez" <mcgrof@...nel.org>
Subject: Re: [PATCH v3 2/3] x86/platform/intel-mid: Allocate RTC interrupt
 for Merrifield

On Wed, 18 Jan 2017, Andy Shevchenko wrote:
> +#include <linux/init.h>
> +
> +#include <asm/hw_irq.h>
> +#include <asm/intel-mid.h>
> +#include <asm/io_apic.h>
> +#include <asm/time.h>
> +#include <asm/x86_init.h>
> +
> +static int __init mrfld_legacy_rtc_alloc_irq(void)
> +{
> +	struct irq_alloc_info info;
> +	int ret;
> +
> +	if (!x86_platform.legacy.rtc)
> +		return -ENODEV;
> +
> +	ioapic_set_alloc_attr(&info, NUMA_NO_NODE, 1, 0);
> +	ret = mp_map_gsi_to_irq(RTC_IRQ, IOAPIC_MAP_ALLOC, &info);
> +	if (ret < 0) {
> +		pr_info("Failed to allocate RTC interrupt. Disabling RTC\n");
> +		x86_platform.legacy.rtc = 0;
> +		return ret;
> +	}
> +
> +	return 0;
> +}
> +
> +static int __init mrfld_legacy_rtc_init(void)
> +{
> +	if (intel_mid_identify_cpu() != INTEL_MID_CPU_CHIP_TANGIER)
> +		return -ENODEV;
> +
> +	return mrfld_legacy_rtc_alloc_irq();
> +}
> +rootfs_initcall(mrfld_legacy_rtc_init);

rootfs_initcall???? That does not make any sense at all. I know you need it
before the device initcalls, but just using a random initcall level before
device_initcall is wrong.

arch_initcall is much more suitable.

Thanks,

	tglx