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53ba5e09fe
Add missing volatile to the get_clock / get_cycles inline assemblies to avoid that consecutive calls get optimized away. Signed-off-by: Andreas Krebbel <krebbel1@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
35 lines
698 B
C
35 lines
698 B
C
/*
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* include/asm-s390/timex.h
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*
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* S390 version
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* Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
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*
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* Derived from "include/asm-i386/timex.h"
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* Copyright (C) 1992, Linus Torvalds
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*/
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#ifndef _ASM_S390_TIMEX_H
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#define _ASM_S390_TIMEX_H
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#define CLOCK_TICK_RATE 1193180 /* Underlying HZ */
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typedef unsigned long long cycles_t;
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static inline cycles_t get_cycles(void)
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{
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cycles_t cycles;
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__asm__ __volatile__ ("stck 0(%1)" : "=m" (cycles) : "a" (&cycles) : "cc");
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return cycles >> 2;
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}
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static inline unsigned long long get_clock (void)
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{
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unsigned long long clk;
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__asm__ __volatile__ ("stck 0(%1)" : "=m" (clk) : "a" (&clk) : "cc");
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return clk;
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}
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#endif
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