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The --kernel option of perf buildid-list tool should show the running
kernel buildid. The functionality has been lost during other changes of
the related code.
The build_id__sprintf() function should return length of the build-id
string, but it was the length of the build-id raw data instead. Due to
that, some return value checking caused that the final string was not
printed out.
With this patch the build_id__sprintf() returns the correct value, so
the --kernel option works again.
Before:
# perf buildid-list --kernel
#
After:
# perf buildid-list --kernel
972c1edab5bdc06cc224af45d510af662a3c6972
#
Signed-off-by: Michael Petlan <mpetlan@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
LPU-Reference: 1448632089.24573.114.camel@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>