linux-kernel - [tip:perf/core] tools include compiler-gcc: Add _

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Message-ID: <tip-oubheiqj8edo5rzewt11cbn0@git.kernel.org>
Date:   Sat, 19 May 2018 04:43:43 -0700
From:   tip-bot for Arnaldo Carvalho de Melo <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     jolsa@...nel.org, tglx@...utronix.de, wangnan0@...wei.com,
        linux-kernel@...r.kernel.org, hpa@...or.com, dsahern@...il.com,
        acme@...hat.com, namhyung@...nel.org, adrian.hunter@...el.com,
        mingo@...nel.org
Subject: [tip:perf/core] tools include compiler-gcc: Add __pure attribute
 helper

Commit-ID:  6e1690c4c0b540930f08295b6a95c8660b257745
Gitweb:     https://git.kernel.org/tip/6e1690c4c0b540930f08295b6a95c8660b257745
Author:     Arnaldo Carvalho de Melo <acme@...hat.com>
AuthorDate: Thu, 17 May 2018 15:12:36 -0300
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Thu, 17 May 2018 15:17:21 -0300

tools include compiler-gcc: Add __pure attribute helper

Adopt it from the kernel sources, will be used soon.

Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: David Ahern <dsahern@...il.com>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Wang Nan <wangnan0@...wei.com>
Link: https://lkml.kernel.org/n/tip-oubheiqj8edo5rzewt11cbn0@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/include/linux/compiler-gcc.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/include/linux/compiler-gcc.h b/tools/include/linux/compiler-gcc.h
index a3a4427441bf..70fe61295733 100644
--- a/tools/include/linux/compiler-gcc.h
+++ b/tools/include/linux/compiler-gcc.h
@@ -21,6 +21,9 @@
 /* &a[0] degrades to a pointer: a different type from an array */
 #define __must_be_array(a)	BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0]))
 
+#ifndef __pure
+#define  __pure		__attribute__((pure))
+#endif
 #define  noinline	__attribute__((noinline))
 #ifndef __packed
 #define __packed	__attribute__((packed))