ring-buffer: Add enum names for the context levels
Instead of having hard coded numbers for the context levels, use enums to describe them more. Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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@ -399,6 +399,23 @@ struct rb_irq_work {
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bool wakeup_full;
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bool wakeup_full;
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};
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};
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/*
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* Used for which event context the event is in.
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* NMI = 0
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* IRQ = 1
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* SOFTIRQ = 2
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* NORMAL = 3
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*
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* See trace_recursive_lock() comment below for more details.
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*/
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enum {
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RB_CTX_NMI,
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RB_CTX_IRQ,
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RB_CTX_SOFTIRQ,
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RB_CTX_NORMAL,
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RB_CTX_MAX
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};
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/*
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/*
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* head_page == tail_page && head == tail then buffer is empty.
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* head_page == tail_page && head == tail then buffer is empty.
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*/
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*/
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@ -2173,7 +2190,7 @@ static unsigned rb_calculate_event_length(unsigned length)
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/* zero length can cause confusions */
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/* zero length can cause confusions */
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if (!length)
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if (!length)
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length = 1;
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length++;
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if (length > RB_MAX_SMALL_DATA || RB_FORCE_8BYTE_ALIGNMENT)
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if (length > RB_MAX_SMALL_DATA || RB_FORCE_8BYTE_ALIGNMENT)
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length += sizeof(event.array[0]);
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length += sizeof(event.array[0]);
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@ -2631,13 +2648,13 @@ trace_recursive_lock(struct ring_buffer_per_cpu *cpu_buffer)
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if (in_interrupt()) {
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if (in_interrupt()) {
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if (in_nmi())
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if (in_nmi())
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bit = 0;
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bit = RB_CTX_NMI;
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else if (in_irq())
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else if (in_irq())
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bit = 1;
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bit = RB_CTX_IRQ;
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else
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else
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bit = 2;
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bit = RB_CTX_SOFTIRQ;
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} else
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} else
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bit = 3;
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bit = RB_CTX_NORMAL;
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if (unlikely(val & (1 << bit)))
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if (unlikely(val & (1 << bit)))
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return 1;
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return 1;
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