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v0.8.1
https://github.com/torvalds/linux
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Tip revision: 694d0d0bb2030d2e36df73e2d23d5770511dbc8d authored by Linus Torvalds on 15 August 2016, 02:11:36 UTC
Linux 4.8-rc2
Tip revision: 694d0d0
bugs_64.c
/*
 *  Copyright (C) 1994  Linus Torvalds
 *  Copyright (C) 2000  SuSE
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <asm/alternative.h>
#include <asm/bugs.h>
#include <asm/processor.h>
#include <asm/mtrr.h>
#include <asm/cacheflush.h>

void __init check_bugs(void)
{
	identify_boot_cpu();
#if !defined(CONFIG_SMP)
	pr_info("CPU: ");
	print_cpu_info(&boot_cpu_data);
#endif
	alternative_instructions();

	/*
	 * Make sure the first 2MB area is not mapped by huge pages
	 * There are typically fixed size MTRRs in there and overlapping
	 * MTRRs into large pages causes slow downs.
	 *
	 * Right now we don't do that with gbpages because there seems
	 * very little benefit for that case.
	 */
	if (!direct_gbpages)
		set_memory_4k((unsigned long)__va(0), 1);
}
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