On Wed, 13 Mar 2019 11:09:48 -0400
Joel Fernandes <joel@xxxxxxxxxxxxxxxxx> wrote:
> AFAICS, lockdep does not specifically track when we enter an interrupt, but
> rather only tracks when interrupts are enabled/disabled.
It does:
#define __irq_enter() \
do { \
account_irq_enter_time(current); \
preempt_count_add(HARDIRQ_OFFSET); \
trace_hardirq_enter(); \
} while (0)
# define trace_hardirq_enter() \
do { \
current->hardirq_context++; \
} while (0)
And if the hardirq_context ever does not match "in_irq()" lockdep will
complain loudly.
-- Steve
