Re: [PATCH 4/4] locking/lockdep: Test all incompatible scenario at once in check_irq_usage()

[Yuyang Du]

On Wed, 3 Apr 2019 at 00:05, Frederic Weisbecker <frede...@kernel.org> wrote:
>
> check_prev_add_irq() tests all incompatible scenarios one after the
> other while adding a lock (@next) to a tree dependency (@prev):
>
>         LOCK_USED_IN_HARDIRQ          vs         LOCK_ENABLED_HARDIRQ
>         LOCK_USED_IN_HARDIRQ_READ     vs         LOCK_ENABLED_HARDIRQ
>         LOCK_USED_IN_SOFTIRQ          vs         LOCK_ENABLED_SOFTIRQ
>         LOCK_USED_IN_SOFTIRQ_READ     vs         LOCK_ENABLED_SOFTIRQ

May I ask why

LOCK_USED_IN_*IRQ vs. LOCK_ENABLED_*IRQ_READ

is not tested?

Thanks,
Yuyang