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| author | Thomas Gleixner <tglx@linutronix.de> | 2019-07-26 23:19:40 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2019-07-31 19:03:35 +0200 |
| commit | 30c937043b2db09ae3408f5534824f9ececdb581 (patch) | |
| tree | 29b30d0553ce00dddfc35a2a75a3bedae9c7fb7b /kernel | |
| parent | 27972765bd0410fc2ef5e86a41de17c71440a2dd (diff) | |
| download | lwn-30c937043b2db09ae3408f5534824f9ececdb581.tar.gz lwn-30c937043b2db09ae3408f5534824f9ececdb581.zip | |
tracing: Use CONFIG_PREEMPTION
CONFIG_PREEMPTION is selected by CONFIG_PREEMPT and by
CONFIG_PREEMPT_RT. Both PREEMPT and PREEMPT_RT require the same
functionality which today depends on CONFIG_PREEMPT.
Switch the conditionals in the tracer over to CONFIG_PREEMPTION.
This is the first step to make the tracer work on RT. The other small
tweaks are submitted separately.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Paul E. McKenney <paulmck@linux.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/20190726212124.409766323@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/Kconfig | 4 | ||||
| -rw-r--r-- | kernel/trace/ftrace.c | 2 | ||||
| -rw-r--r-- | kernel/trace/ring_buffer_benchmark.c | 2 | ||||
| -rw-r--r-- | kernel/trace/trace_events.c | 4 |
4 files changed, 6 insertions, 6 deletions
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig index d2c1fe0b451d..6a64d7772870 100644 --- a/kernel/trace/Kconfig +++ b/kernel/trace/Kconfig @@ -179,7 +179,7 @@ config TRACE_PREEMPT_TOGGLE config PREEMPTIRQ_EVENTS bool "Enable trace events for preempt and irq disable/enable" select TRACE_IRQFLAGS - select TRACE_PREEMPT_TOGGLE if PREEMPT + select TRACE_PREEMPT_TOGGLE if PREEMPTION select GENERIC_TRACER default n help @@ -214,7 +214,7 @@ config PREEMPT_TRACER bool "Preemption-off Latency Tracer" default n depends on !ARCH_USES_GETTIMEOFFSET - depends on PREEMPT + depends on PREEMPTION select GENERIC_TRACER select TRACER_MAX_TRACE select RING_BUFFER_ALLOW_SWAP diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index eca34503f178..a800e867c1a3 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -2814,7 +2814,7 @@ int ftrace_shutdown(struct ftrace_ops *ops, int command) * synchornize_rcu_tasks() will wait for those tasks to * execute and either schedule voluntarily or enter user space. */ - if (IS_ENABLED(CONFIG_PREEMPT)) + if (IS_ENABLED(CONFIG_PREEMPTION)) synchronize_rcu_tasks(); free_ops: diff --git a/kernel/trace/ring_buffer_benchmark.c b/kernel/trace/ring_buffer_benchmark.c index 0564f6db0561..09b0b49f346e 100644 --- a/kernel/trace/ring_buffer_benchmark.c +++ b/kernel/trace/ring_buffer_benchmark.c @@ -267,7 +267,7 @@ static void ring_buffer_producer(void) if (consumer && !(cnt % wakeup_interval)) wake_up_process(consumer); -#ifndef CONFIG_PREEMPT +#ifndef CONFIG_PREEMPTION /* * If we are a non preempt kernel, the 10 second run will * stop everything while it runs. Instead, we will call diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c index c7506bc81b75..5a189fb8ec23 100644 --- a/kernel/trace/trace_events.c +++ b/kernel/trace/trace_events.c @@ -255,12 +255,12 @@ void *trace_event_buffer_reserve(struct trace_event_buffer *fbuffer, local_save_flags(fbuffer->flags); fbuffer->pc = preempt_count(); /* - * If CONFIG_PREEMPT is enabled, then the tracepoint itself disables + * If CONFIG_PREEMPTION is enabled, then the tracepoint itself disables * preemption (adding one to the preempt_count). Since we are * interested in the preempt_count at the time the tracepoint was * hit, we need to subtract one to offset the increment. */ - if (IS_ENABLED(CONFIG_PREEMPT)) + if (IS_ENABLED(CONFIG_PREEMPTION)) fbuffer->pc--; fbuffer->trace_file = trace_file; |