From mboxrd@z Thu Jan  1 00:00:00 1970
From: dyoung@redhat.com (Dave Young)
Date: Mon, 7 Jul 2014 15:33:37 +0800
Subject: [PATCH 7/8] arm64/kexec: Add core kexec support
In-Reply-To: <64ef27888fa70b3e27ddcf4ca594fa71ab7f7777.1399594544.git.geoff@infradead.org>
References: <cover.1399594544.git.geoff@infradead.org>
 <64ef27888fa70b3e27ddcf4ca594fa71ab7f7777.1399594544.git.geoff@infradead.org>
Message-ID: <20140707073337.GA1108@dhcp-16-198.nay.redhat.com>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

[snip]

> +
> +/**
> + * kexec_cpu_info_init - Initialize an array of kexec_cpu_info structures.
> + *
> + * Allocates a cpu info array and fills it with info for all cpus found in
> + * the device tree passed.  The cpu info array is zero terminated.
> + */
> +
> +int kexec_cpu_info_init(const struct device_node *dn,
> +	struct kexec_dt_info *info)
> +{
> +	int result;
> +	unsigned int cpu;
> +	const struct device_node *i;
> +
> +	info->cpu_info = kmalloc(
> +		(1 + info->cpu_count) * sizeof(struct kexec_cpu_info),
> +		GFP_KERNEL);
> +
> +	if (!info->cpu_info) {
> +		pr_debug("%s: out of memory", __func__);
> +		return -ENOMEM;
> +	}
> +
> +	info->spinner_count = 0;
> +
> +	for (cpu = 0, i = dn; cpu < info->cpu_count; cpu++) {
> +		struct kexec_cpu_info *cpu_info = &info->cpu_info[cpu];
> +
> +		i = of_find_node_by_type((struct device_node *)i, "cpu");
> +
> +		BUG_ON(!i);
> +
> +		cpu_info->cpu = cpu;
> +
> +		result = cpu_read_ops((struct device_node *)i, cpu,
> +			&cpu_info->cpu_ops);

cpu_ops memory is not allocated?

BTW cpu_read_ops will call cpu_get_ops which is marked as __init

Thanks
Dave