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perf tools: Remove unused cpu_relax() macros

tip:perf/core tip-bot for Arnaldo Carvalho de Melo 1 participant 1 message Aug 22, 2017 perf events

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Commit-ID:  4717e03cc7e826818c3f9bd60e9c304a3309c3ad
Gitweb:     http://git.kernel.org/tip/4717e03cc7e826818c3f9bd60e9c304a3309c3ad
Author:     Arnaldo Carvalho de Melo <[email protected]>
AuthorDate: Thu, 17 Aug 2017 16:44:36 -0300
Committer:  Arnaldo Carvalho de Melo <[email protected]>
CommitDate: Thu, 17 Aug 2017 16:51:25 -0300

perf tools: Remove unused cpu_relax() macros

Since 195564390210 ("perf_counter: kerneltop: simplify data_head read") we do not use it, and this was way back in 2009, remove it before some other arch maintainer adds its implementation, like so many did, needlessly :-)

Cc Adrian Hunter <[email protected]>
Cc David Ahern <[email protected]>
Cc Jiri Olsa <[email protected]>
Cc Namhyung Kim <[email protected]>
Cc Peter Zijlstra <[email protected]>
Cc Wang Nan <[email protected]>
Link http://lkml.kernel.org/n/[email protected] open here
Signed-off-by Arnaldo Carvalho de Melo <[email protected]>
---
 tools/perf/perf-sys.h | 9 ---------
 1 file changed, 9 deletions(-)
tools/perf/perf-sys.h +0 -9
index e4b717e..2aaa736 100644
@@ -10,12 +10,10 @@
 #include <asm/barrier.h>
 
 #if defined(__i386__)
-#define cpu_relax()	asm volatile("rep; nop" ::: "memory");
 #define CPUINFO_PROC	{"model name"}
 #endif
 
 #if defined(__x86_64__)
-#define cpu_relax()	asm volatile("rep; nop" ::: "memory");
 #define CPUINFO_PROC	{"model name"}
 #endif
 

@@ -44,7 +42,6 @@
 #endif
 
 #ifdef __ia64__
-#define cpu_relax()	asm volatile ("hint @pause" ::: "memory")
 #define CPUINFO_PROC	{"model name"}
 #endif
 

@@ -53,7 +50,6 @@
 #endif
 
 #ifdef __aarch64__
-#define cpu_relax()	asm volatile("yield" ::: "memory")
 #endif
 
 #ifdef __mips__

@@ -73,14 +69,9 @@
 #endif
 
 #ifdef __tile__
-#define cpu_relax()	asm volatile ("mfspr zero, PASS" ::: "memory")
 #define CPUINFO_PROC    {"model name"}
 #endif
 
-#ifndef cpu_relax
-#define cpu_relax() barrier()
-#endif
-
 static inline int
 sys_perf_event_open(struct perf_event_attr *attr,
 		      pid_t pid, int cpu, int group_fd,