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authorFrederic Weisbecker <fweisbec@gmail.com>2009-06-25 22:21:27 +0200
committerIngo Molnar <mingo@elte.hu>2009-06-25 22:25:55 +0200
commit3928ddbe994cce1da1b6365b0db04d5765f254f4 (patch)
tree23419e9b7bb39be5296ef30b8c828ce1bf44f297 /tools/perf/builtin-record.c
parent4418351f06d9ce73acc846158c20186965f920f3 (diff)
downloadop-kernel-dev-3928ddbe994cce1da1b6365b0db04d5765f254f4.zip
op-kernel-dev-3928ddbe994cce1da1b6365b0db04d5765f254f4.tar.gz
perf record: Fix unhandled io return value
Building latest perfcounter fails on the following error: builtin-record.c: In function ‘create_counter’: builtin-record.c:451: erreur: ignoring return value of ‘read’, declared with attribute warn_unused_result make: *** [builtin-record.o] Erreur 1 Just check if we successfully read the perf file descriptor. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <1245961287-5327-1-git-send-email-fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools/perf/builtin-record.c')
-rw-r--r--tools/perf/builtin-record.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 798a56d..d18546f 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -448,7 +448,10 @@ try_again:
}
}
- read(fd[nr_cpu][counter], &read_data, sizeof(read_data));
+ if (read(fd[nr_cpu][counter], &read_data, sizeof(read_data)) == -1) {
+ perror("Unable to read perf file descriptor\n");
+ exit(-1);
+ }
perf_header_attr__add_id(h_attr, read_data.id);
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