linux-kernel - [PATCH 1/2] perf tools: Make usage of test_attr_

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Message-Id: <20191001113307.27796-2-bjorn.topel@gmail.com>
Date:   Tue,  1 Oct 2019 13:33:06 +0200
From:   Björn Töpel <bjorn.topel@...il.com>
To:     linux-kernel@...r.kernel.org, acme@...nel.org
Cc:     Björn Töpel <bjorn.topel@...el.com>,
        netdev@...r.kernel.org, bpf@...r.kernel.org, ast@...nel.org,
        daniel@...earbox.net, adrian.hunter@...el.com, jolsa@...nel.org,
        namhyung@...nel.org
Subject: [PATCH 1/2] perf tools: Make usage of test_attr__* optional for perf-sys.h

From: Björn Töpel <bjorn.topel@...el.com>

For users of perf-sys.h outside perf, e.g. samples/bpf/bpf_load.c,
it's convenient not to depend on test_attr__*.

After commit 91854f9a077e ("perf tools: Move everything related to
sys_perf_event_open() to perf-sys.h"), all users of perf-sys.h will
depend on test_attr__enabled and test_attr__open.

This commit enables a user to define HAVE_ATTR_TEST to zero in order
to omit the test dependency.

Fixes: 91854f9a077e ("perf tools: Move everything related to sys_perf_event_open() to perf-sys.h")
Signed-off-by: Björn Töpel <bjorn.topel@...el.com>
---
 tools/perf/perf-sys.h | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/tools/perf/perf-sys.h b/tools/perf/perf-sys.h
index 63e4349a772a..15e458e150bd 100644
--- a/tools/perf/perf-sys.h
+++ b/tools/perf/perf-sys.h
@@ -15,7 +15,9 @@ void test_attr__init(void);
 void test_attr__open(struct perf_event_attr *attr, pid_t pid, int cpu,
 		     int fd, int group_fd, unsigned long flags);
 
-#define HAVE_ATTR_TEST
+#ifndef HAVE_ATTR_TEST
+#define HAVE_ATTR_TEST 1
+#endif
 
 static inline int
 sys_perf_event_open(struct perf_event_attr *attr,
@@ -27,7 +29,7 @@ sys_perf_event_open(struct perf_event_attr *attr,
 	fd = syscall(__NR_perf_event_open, attr, pid, cpu,
 		     group_fd, flags);
 
-#ifdef HAVE_ATTR_TEST
+#if HAVE_ATTR_TEST
 	if (unlikely(test_attr__enabled))
 		test_attr__open(attr, pid, cpu, fd, group_fd, flags);
 #endif
-- 
2.20.1