ring-buffer: Use READ_ONCE() for most tail_page access

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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>

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Steven Rostedt (Red Hat) 2015-11-17 14:03:11 -05:00 • committed by Steven Rostedt

parent 3cbd6a43be

commit 8573636ea7

1 changed files with 11 additions and 7 deletions

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kernel/trace/ring_buffer.c

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