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lockdep: Prepare for noinstr sections

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Force inlining and prevent instrumentation of all sorts by marking the
functions which are invoked from low level entry code with 'noinstr'.

Split the irqflags tracking into two parts. One which does the heavy
lifting while RCU is watching and the final one which can be invoked after
RCU is turned off.

Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com>
Link: https://lkml.kernel.org/r/20200505134100.484532537@linutronix.de
This commit is contained in:
Peter Zijlstra
2020-03-18 14:22:03 +01:00
committed by Thomas Gleixner
parent 0995a5dfbe
commit c86e9b987c
5 changed files with 71 additions and 22 deletions
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include/linux/sched.h
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@@ -983,6 +983,7 @@ struct task_struct {
unsigned int hardirq_disable_event;
int hardirqs_enabled;
int hardirq_context;
u64 hardirq_chain_key;
unsigned long softirq_disable_ip;
unsigned long softirq_enable_ip;
unsigned int softirq_disable_event;