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Impact: Restructure WARN_ONs in ring_buffer.c The current WARN_ON macros in ring_buffer.c are quite ugly. This patch cleans them up and uses a single RB_WARN_ON that returns the value of the condition. This allows the caller to abort the function if the condition is true. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>