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perf tools: Move s390 barrier.h stuff to tools/arch/s390/include/asm/barrier.h

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We will need it for atomic.h, so move it from the ad-hoc tools/perf/
place to a tools/ subset of the kernel arch/ hierarchy.

Cc: Adrian Hunter <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Don Zickus <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Stephane Eranian <[email protected]>
Link: http://lkml.kernel.org/n/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
This commit is contained in:
Arnaldo Carvalho de Melo 2015-05-06 18:44:53 -03:00
commit 07d207ac0c
4 changed files with 33 additions and 3 deletions
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30
tools/arch/s390/include/asm/barrier.h Normal file
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@ -0,0 +1,30 @@
/*
* Copied from the kernel sources:
*
* Copyright IBM Corp. 1999, 2009
*
* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
*/
#ifndef __TOOLS_LINUX_ASM_BARRIER_H
#define __TOOLS_LINUX_ASM_BARRIER_H
/*
* Force strict CPU ordering.
* And yes, this is required on UP too when we're talking
* to devices.
*/
#ifdef CONFIG_HAVE_MARCH_Z196_FEATURES
/* Fast-BCR without checkpoint synchronization */
#define __ASM_BARRIER "bcr 14,0\n"
#else
#define __ASM_BARRIER "bcr 15,0\n"
#endif
#define mb() do { asm volatile(__ASM_BARRIER : : : "memory"); } while (0)
#define rmb() mb()
#define wmb() mb()
#endif /* __TOOLS_LIB_ASM_BARRIER_H */