perf record: Simplify perf_record__write

1. Since all callers either test if it is less than zero or assign its
   result to an int variable, convert it from ssize_t to int;

2. There is just one use for the 'session' variable, so use rec->session
   directly instead;

3. No need to store the result of perf_data_file__write, since that
   result is either 'size' or -1, the later making the error result to
   be stored in 'errno' and accessed thru printf's %m in the pr_err
   call.

Cc: Adrian Hunter <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Mike Galbraith <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Stephane Eranian <[email protected]>
Link: http://lkml.kernel.org/n/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

0 files changed, 0 insertions, 0 deletions