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Minchan reported that perf failed to load vmlinux if --symfs argument doesn't end with '/' character. Fix it by making sure that the '/' path separator is used when composing pathnames with a --symfs provided directory name. Reported-by: Minchan Kim <minchan@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/n/tip-8n4s6b6zvsez5ktanw006125@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>