linux-kernel - [tip:perf/core] perf tools: Move arm(64) barrier.h stuff to tools /arch/arm*/include/asm/barrier.h

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Date:	Sun, 10 May 2015 00:08:25 -0700
From:	tip-bot for Arnaldo Carvalho de Melo <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	bp@...e.de, fweisbec@...il.com, acme@...hat.com, mingo@...nel.org,
	adrian.hunter@...el.com, namhyung@...nel.org, eranian@...gle.com,
	linux-kernel@...r.kernel.org, hpa@...or.com, dzickus@...hat.com,
	tglx@...utronix.de, dsahern@...il.com, jolsa@...hat.com
Subject: [tip:perf/core] perf tools: Move arm(64) barrier.h stuff to tools
 /arch/arm*/include/asm/barrier.h

Commit-ID:  4f3db0746c91453a88e302d1aac30be08ba9e52f
Gitweb:     http://git.kernel.org/tip/4f3db0746c91453a88e302d1aac30be08ba9e52f
Author:     Arnaldo Carvalho de Melo <acme@...hat.com>
AuthorDate: Thu, 7 May 2015 18:14:25 -0300
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Fri, 8 May 2015 16:05:06 -0300

perf tools: Move arm(64) barrier.h stuff to tools/arch/arm*/include/asm/barrier.h

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 <adrian.hunter@...el.com>
Cc: Borislav Petkov <bp@...e.de>
Cc: David Ahern <dsahern@...il.com>
Cc: Don Zickus <dzickus@...hat.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Stephane Eranian <eranian@...gle.com>
Link: http://lkml.kernel.org/n/tip-cgfhreaejd7ohitdjccu9k2o@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/arch/arm/include/asm/barrier.h   | 12 ++++++++++++
 tools/arch/arm64/include/asm/barrier.h | 16 ++++++++++++++++
 tools/include/asm/barrier.h            |  4 ++++
 tools/perf/MANIFEST                    |  1 +
 tools/perf/perf-sys.h                  | 10 ----------
 5 files changed, 33 insertions(+), 10 deletions(-)

diff --git a/tools/arch/arm/include/asm/barrier.h b/tools/arch/arm/include/asm/barrier.h
new file mode 100644
index 0000000..005c618
--- /dev/null
+++ b/tools/arch/arm/include/asm/barrier.h
@@ -0,0 +1,12 @@
+#ifndef _TOOLS_LINUX_ASM_ARM_BARRIER_H
+#define _TOOLS_LINUX_ASM_ARM_BARRIER_H
+
+/*
+ * Use the __kuser_memory_barrier helper in the CPU helper page. See
+ * arch/arm/kernel/entry-armv.S in the kernel source for details.
+ */
+#define mb()		((void(*)(void))0xffff0fa0)()
+#define wmb()		((void(*)(void))0xffff0fa0)()
+#define rmb()		((void(*)(void))0xffff0fa0)()
+
+#endif /* _TOOLS_LINUX_ASM_ARM_BARRIER_H */
diff --git a/tools/arch/arm64/include/asm/barrier.h b/tools/arch/arm64/include/asm/barrier.h
new file mode 100644
index 0000000..a0483c8
--- /dev/null
+++ b/tools/arch/arm64/include/asm/barrier.h
@@ -0,0 +1,16 @@
+#ifndef _TOOLS_LINUX_ASM_AARCH64_BARRIER_H
+#define _TOOLS_LINUX_ASM_AARCH64_BARRIER_H
+
+/*
+ * From tools/perf/perf-sys.h, last modified in:
+ * f428ebd184c82a7914b2aa7e9f868918aaf7ea78 perf tools: Fix AAAAARGH64 memory barriers
+ *
+ * XXX: arch/arm64/include/asm/barrier.h in the kernel sources use dsb, is this
+ * a case like for arm32 where we do things differently in userspace?
+ */
+
+#define mb()		asm volatile("dmb ish" ::: "memory")
+#define wmb()		asm volatile("dmb ishst" ::: "memory")
+#define rmb()		asm volatile("dmb ishld" ::: "memory")
+
+#endif /* _TOOLS_LINUX_ASM_AARCH64_BARRIER_H */
diff --git a/tools/include/asm/barrier.h b/tools/include/asm/barrier.h
index 659aa60..d2ddca50 100644
--- a/tools/include/asm/barrier.h
+++ b/tools/include/asm/barrier.h
@@ -1,5 +1,9 @@
 #if defined(__i386__) || defined(__x86_64__)
 #include "../../arch/x86/include/asm/barrier.h"
+#elif defined(__arm__)
+#include "../../arch/arm/include/asm/barrier.h"
+#elif defined(__aarch64__)
+#include "../../arch/arm64/include/asm/barrier.h"
 #elif defined(__powerpc__)
 #include "../../arch/powerpc/include/asm/barrier.h"
 #elif defined(__s390__)
diff --git a/tools/perf/MANIFEST b/tools/perf/MANIFEST
index 74981a6..1b330dd 100644
--- a/tools/perf/MANIFEST
+++ b/tools/perf/MANIFEST
@@ -1,5 +1,6 @@
 tools/perf
 tools/arch/alpha/include/asm/barrier.h
+tools/arch/arm/include/asm/barrier.h
 tools/arch/ia64/include/asm/barrier.h
 tools/arch/powerpc/include/asm/barrier.h
 tools/arch/s390/include/asm/barrier.h
diff --git a/tools/perf/perf-sys.h b/tools/perf/perf-sys.h
index 79052fd..56edbe1 100644
--- a/tools/perf/perf-sys.h
+++ b/tools/perf/perf-sys.h
@@ -70,20 +70,10 @@
 #endif
 
 #ifdef __arm__
-/*
- * Use the __kuser_memory_barrier helper in the CPU helper page. See
- * arch/arm/kernel/entry-armv.S in the kernel source for details.
- */
-#define mb()		((void(*)(void))0xffff0fa0)()
-#define wmb()		((void(*)(void))0xffff0fa0)()
-#define rmb()		((void(*)(void))0xffff0fa0)()
 #define CPUINFO_PROC	{"model name", "Processor"}
 #endif
 
 #ifdef __aarch64__
-#define mb()		asm volatile("dmb ish" ::: "memory")
-#define wmb()		asm volatile("dmb ishst" ::: "memory")
-#define rmb()		asm volatile("dmb ishld" ::: "memory")
 #define cpu_relax()	asm volatile("yield" ::: "memory")
 #endif
 
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