[mirror_ubuntu-artful-kernel.git] / arch / x86 / include / asm / vsyscall.h

#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(struct pt_regs *regs, unsigned long address);
#else
static inline void map_vsyscall(void) {}
static inline bool emulate_vsyscall(struct pt_regs *regs, unsigned long address)
{
	return false;
}
#endif

#endif /* _ASM_X86_VSYSCALL_H */
Commit	Line	Data
1965aae3 PA	1	#ifndef _ASM_X86_VSYSCALL_H
1965aae3 PA	2	#define _ASM_X86_VSYSCALL_H
1da177e4	3
75da736f	4	#include <linux/seqlock.h>
af170c50	5	#include <uapi/asm/vsyscall.h>
1da177e4	6
1ad83c85	7	#ifdef CONFIG_X86_VSYSCALL_EMULATION
e4026440	8	extern void map_vsyscall(void);
7a2ba0ea	9	extern void set_vsyscall_pgtable_user_bits(pgd_t *root);
e4026440	10
3ae36655 AL	11	/*
	12	* Called on instruction fetch fault in vsyscall page.
	13	* Returns true if handled.
	14	*/
	15	extern bool emulate_vsyscall(struct pt_regs *regs, unsigned long address);
1ad83c85 AL	16	#else
	17	static inline void map_vsyscall(void) {}
	18	static inline bool emulate_vsyscall(struct pt_regs *regs, unsigned long address)
	19	{
	20	return false;
	21	}
	22	#endif
3ae36655	23
1965aae3	24	#endif /* _ASM_X86_VSYSCALL_H */