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Revision 496063426dece3f47e21f9f3387205d6ca03bd2a authored by Dave Jones on 14 October 2016, 18:26:24 UTC, committed by Linus Torvalds on 14 October 2016, 18:36:59 UTC 
pkeys: Remove easily triggered WARN
 
This easy-to-trigger warning shows up instantly when running
Trinity on a kernel with CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS disabled.

At most this should have been a printk, but the -EINVAL alone should be more
than adequate indicator that something isn't available.

Signed-off-by: Dave Jones <davej@codemonkey.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent e9f8f48
Raw File
irq_regs.h 
/* Fallback per-CPU frame pointer holder
 *
 * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells (dhowells@redhat.com)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */

#ifndef _ASM_GENERIC_IRQ_REGS_H
#define _ASM_GENERIC_IRQ_REGS_H

#include <linux/percpu.h>

/*
 * Per-cpu current frame pointer - the location of the last exception frame on
 * the stack
 */
DECLARE_PER_CPU(struct pt_regs *, __irq_regs);

static inline struct pt_regs *get_irq_regs(void)
{
	return __this_cpu_read(__irq_regs);
}

static inline struct pt_regs *set_irq_regs(struct pt_regs *new_regs)
{
	struct pt_regs *old_regs;

	old_regs = __this_cpu_read(__irq_regs);
	__this_cpu_write(__irq_regs, new_regs);
	return old_regs;
}

#endif /* _ASM_GENERIC_IRQ_REGS_H */
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