https://github.com/torvalds/linux
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Tip revision: a7904a538933c525096ca2ccde1e60d0ee62c08e authored by Linus Torvalds on 19 December 2021, 22:14:33 UTC
Linux 5.16-rc6
Tip revision: a7904a5
eisa.c
// SPDX-License-Identifier: GPL-2.0-only
/*
 * EISA specific code
 */
#include <linux/ioport.h>
#include <linux/eisa.h>
#include <linux/io.h>

#include <xen/xen.h>

static __init int eisa_bus_probe(void)
{
	void __iomem *p;

	if (xen_pv_domain() && !xen_initial_domain())
		return 0;

	p = ioremap(0x0FFFD9, 4);
	if (p && readl(p) == 'E' + ('I' << 8) + ('S' << 16) + ('A' << 24))
		EISA_bus = 1;
	iounmap(p);
	return 0;
}
subsys_initcall(eisa_bus_probe);
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