perf report: Count number of entries separately
The hists->nr_entries is counted in multiple places so that they can confuse readers of the code. This is a preparation of later change and do not intend any functional difference. Note that report__collapse_hists() now changed to return nothing since its return value (nr_samples) is only for checking if there's any data in the input file and this can be acheived by checking ->nr_entries. Signed-off-by: NNamhyung Kim <namhyung@kernel.org> Link: http://lkml.kernel.org/r/1398327843-31845-2-git-send-email-namhyung@kernel.orgSigned-off-by: NJiri Olsa <jolsa@kernel.org>
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