linux-kernel - [tip:perf/urgent] perf llvm: Use strerror_r instead of the thread unsafe strerror one

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Date:	Thu, 24 Mar 2016 00:45:10 -0700
From:	tip-bot for Arnaldo Carvalho de Melo <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	hpa@...or.com, jolsa@...nel.org, mingo@...nel.org,
	adrian.hunter@...el.com, wangnan0@...wei.com, tglx@...utronix.de,
	linux-kernel@...r.kernel.org, namhyung@...nel.org, acme@...hat.com
Subject: [tip:perf/urgent] perf llvm: Use strerror_r instead of the thread
 unsafe strerror one

Commit-ID:  76267147f233f347dbd8f4f8c05492e5ea0a7dce
Gitweb:     http://git.kernel.org/tip/76267147f233f347dbd8f4f8c05492e5ea0a7dce
Author:     Arnaldo Carvalho de Melo <acme@...hat.com>
AuthorDate: Wed, 23 Mar 2016 17:42:21 -0300
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Wed, 23 Mar 2016 17:42:21 -0300

perf llvm: Use strerror_r instead of the thread unsafe strerror one

Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Wang Nan <wangnan0@...wei.com>
Link: http://lkml.kernel.org/n/tip-5njrq9dltckgm624omw9ljgu@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/llvm-utils.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/tools/perf/util/llvm-utils.c b/tools/perf/util/llvm-utils.c
index aab855f..33071d6 100644
--- a/tools/perf/util/llvm-utils.c
+++ b/tools/perf/util/llvm-utils.c
@@ -98,11 +98,12 @@ read_from_pipe(const char *cmd, void **p_buf, size_t *p_read_sz)
 	void *buf = NULL;
 	FILE *file = NULL;
 	size_t read_sz = 0, buf_sz = 0;
+	char serr[STRERR_BUFSIZE];
 
 	file = popen(cmd, "r");
 	if (!file) {
 		pr_err("ERROR: unable to popen cmd: %s\n",
-		       strerror(errno));
+		       strerror_r(errno, serr, sizeof(serr)));
 		return -EINVAL;
 	}
 
@@ -136,7 +137,7 @@ read_from_pipe(const char *cmd, void **p_buf, size_t *p_read_sz)
 
 	if (ferror(file)) {
 		pr_err("ERROR: error occurred when reading from pipe: %s\n",
-		       strerror(errno));
+		       strerror_r(errno, serr, sizeof(serr)));
 		err = -EIO;
 		goto errout;
 	}
@@ -370,7 +371,7 @@ int llvm__compile_bpf(const char *path, void **p_obj_buf,
 	if (nr_cpus_avail <= 0) {
 		pr_err(
 "WARNING:\tunable to get available CPUs in this system: %s\n"
-"        \tUse 128 instead.\n", strerror(errno));
+"        \tUse 128 instead.\n", strerror_r(errno, serr, sizeof(serr)));
 		nr_cpus_avail = 128;
 	}
 	snprintf(nr_cpus_avail_str, sizeof(nr_cpus_avail_str), "%d",