Cregit: Linux 5.13: vsyscall.h

Contributors: 7
Author	Tokens	Token Proportion	Commits	Commit Proportion
Andrew Lutomirski	66	74.16%	4	40.00%
Ingo Molnar	7	7.87%	1	10.00%
Andi Kleen	6	6.74%	1	10.00%
H. Peter Anvin	3	3.37%	1	10.00%
David Woodhouse	3	3.37%	1	10.00%
David Howells	3	3.37%	1	10.00%
Greg Kroah-Hartman	1	1.12%	1	10.00%
Total	89		10

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_VSYSCALL_H
#define _ASM_X86_VSYSCALL_H

#include <linux/seqlock.h>
#include <uapi/asm/vsyscall.h>

#ifdef CONFIG_X86_VSYSCALL_EMULATION
extern void map_vsyscall(void);
extern void set_vsyscall_pgtable_user_bits(pgd_t *root);

/*
 * Called on instruction fetch fault in vsyscall page.
 * Returns true if handled.
 */
extern bool emulate_vsyscall(unsigned long error_code,
			     struct pt_regs *regs, unsigned long address);
#else
static inline void map_vsyscall(void) {}
static inline bool emulate_vsyscall(unsigned long error_code,
				    struct pt_regs *regs, unsigned long address)
{
	return false;
}
#endif

#endif /* _ASM_X86_VSYSCALL_H */