Commit abc22418 authored by Vincenzo Frascino's avatar Vincenzo Frascino Committed by Thomas Gleixner
Browse files

x86/vdso: Enable x86 to use common headers 



Enable x86 to use only the common headers in the implementation
of the vDSO library.

Signed-off-by: default avatarVincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20200320145351.32292-24-vincenzo.frascino@arm.com
parent c135fc87

arch/x86/include/asm/processor.h

+1 −11
Original line number Diff line number Diff line
@@ -26,6 +26,7 @@ struct vm86; 
#include <asm/fpu/types.h>

#include <asm/unwind_hints.h>

#include <asm/vmxfeatures.h>

#include <asm/vdso/processor.h>



#include <linux/personality.h>

#include <linux/cache.h>
@@ -677,17 +678,6 @@ static inline unsigned int cpuid_edx(unsigned int op) 
	return edx;

}



/* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */

static __always_inline void rep_nop(void)

{

	asm volatile("rep; nop" ::: "memory");

}



static __always_inline void cpu_relax(void)

{

	rep_nop();

}



/*

 * This function forces the icache and prefetched instruction stream to

 * catch up with reality in two very specific cases:

arch/x86/include/asm/vdso/processor.h

0 → 100644
+23 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0-only */

/*

 * Copyright (C) 2020 ARM Ltd.

 */

#ifndef __ASM_VDSO_PROCESSOR_H

#define __ASM_VDSO_PROCESSOR_H



#ifndef __ASSEMBLY__



/* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */

static __always_inline void rep_nop(void)

{

	asm volatile("rep; nop" ::: "memory");

}



static __always_inline void cpu_relax(void)

{

	rep_nop();

}



#endif /* __ASSEMBLY__ */



#endif /* __ASM_VDSO_PROCESSOR_H */