tracing: Convert seq_buf fields to be like seq_file fields
tracing: Convert seq_buf fields to be like seq_file fields

In facilitating the conversion of seq_file to use seq_buf,
have the seq_buf fields match the types used by seq_file.

Link: http://lkml.kernel.org/r/20141104160222.195301024@goodmis.org

Tested-by: Jiri Kosina <ed58f755cc8caaf10c3e8c731a8b86fb8f13d6cb@suse.cz>
Acked-by: Jiri Kosina <ed58f755cc8caaf10c3e8c731a8b86fb8f13d6cb@suse.cz>
Reviewed-by: Petr Mladek <9cbcfb1260d253e26a699647bd9cbee55818ea4a@suse.cz>
Signed-off-by: Steven Rostedt <43232e92d70cc7aa53504ad0397085ee47bad87f@goodmis.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs