When dso_cache__read() is called, it reads data from the given offset
using lseek + normal read syscall. It can be combined to a single
pread syscall.
Signed-off-by: Namhyung Kim <namhy...@kernel.org>
---
tools/perf/util/dso.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
index d8ee1fd826e7..95c8d5a2b934 100644
--- a/tools/perf/util/dso.c
+++ b/tools/perf/util/dso.c
@@ -593,10 +593,7 @@ dso_cache__read(struct dso *dso, struct machine *machine,
}
}
- if (-1 == lseek(dso->data.fd, cache_offset, SEEK_SET))
- goto err_unlock;
-
- ret = read(dso->data.fd, cache->data, DSO__DATA_CACHE_SIZE);
+ ret = pread(dso->data.fd, cache->data, DSO__DATA_CACHE_SIZE,
cache_offset);
if (ret <= 0)
goto err_unlock;
--
2.1.3
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