Steven Rostedt (Red Hat) 10e83fd01c ring-buffer: Use rb_page_size() instead of open coded head_page size
There's a helper function to get a ring buffer page size (the number
of bytes of data recorded on the page), called rb_page_size().
Use that instead of open coding it.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2014-07-23 19:45:12 -04:00
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