diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2021-04-02 08:23:25 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2021-05-17 20:01:35 +0200 |
| commit | c2b1063e8feb2115537addce10f36c0c82d11d9b (patch) | |
| tree | 13b7ad872a31852d967f1869e4feeb0e2cbbf227 /kernel/irq/manage.c | |
| parent | d07f6ca923ea0927a1024dfccafc5b53b61cfecc (diff) | |
genirq: Add a IRQF_NO_DEBUG flag
The whole call to note_interrupt() can be avoided or return early when
interrupts would be marked accordingly. For IPI handlers which always
return HANDLED the whole procedure is pretty pointless to begin with.
Add a IRQF_NO_DEBUG flag and mark the interrupt accordingly if supplied
when the interrupt is requested.
When noirqdebug is set on the kernel commandline, then the interrupt is
marked unconditionally so that there is only one condition in the hotpath
to evaluate.
[ clg: Add changelog ]
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/7a8ad02f-63a8-c1aa-fdd1-39d973593d02@kaod.org
Diffstat (limited to 'kernel/irq/manage.c')
| -rw-r--r-- | kernel/irq/manage.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index 4c14356543d9..7bdd09e7d5f0 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -1686,8 +1686,13 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new) if (new->flags & IRQF_PERCPU) { irqd_set(&desc->irq_data, IRQD_PER_CPU); irq_settings_set_per_cpu(desc); + if (new->flags & IRQF_NO_DEBUG) + irq_settings_set_no_debug(desc); } + if (noirqdebug) + irq_settings_set_no_debug(desc); + if (new->flags & IRQF_ONESHOT) desc->istate |= IRQS_ONESHOT; |