perf symbols: Convert lseek + read to pread
authorNamhyung Kim <namhyung@kernel.org>
Thu, 29 Jan 2015 20:02:01 +0000 (17:02 -0300)
committerArnaldo Carvalho de Melo <acme@redhat.com>
Thu, 29 Jan 2015 20:02:01 +0000 (17:02 -0300)
commitc52686f9f888d23ca72f1309e86af8e91d075697
tree7098b1f13486d538e522191c577c632d3c6cb37e
parent42aa276f40730211383e9a9923416f1fb9841d68
perf symbols: Convert lseek + read to pread

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 <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1422518843-25818-40-git-send-email-namhyung@kernel.org
[ Fixed it up when cherry picking it from the multi threaded patchkit ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
tools/perf/util/dso.c