Steven Rostedt (Red Hat) 8573636ea7 ring-buffer: Use READ_ONCE() for most tail_page access ...

As cpu_buffer->tail_page may be modified by interrupts at almost any time,
the flow of logic is very important. Do not let gcc get smart with
re-reading cpu_buffer->tail_page by adding READ_ONCE() around most of its
accesses.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

2015-11-24 09:29:15 -05:00

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