request_irq() is preferred over setup_irq(). Existing callers of setup_irq() reached mostly via 'init_IRQ()' & 'time_init()', while memory allocators are ready by 'mm_init()'. Per tglx[1], setup_irq() existed in olden days when allocators were not ready by the time early interrupts were initialized. Hence replace setup_irq() by request_irq(). Seldom remove_irq() usage has been observed coupled with setup_irq(), wherever that has been found, it too has been replaced by free_irq(). [1] https://lkml.kernel.org/r/alpine.DEB.2.20.1710191609480.1971@nanos Signed-off-by: afzal mohammed <afzal.mohd.ma@xxxxxxxxx> --- Since cc'ing cover letter to all maintainers/reviewers would be too many, refer for cover letter, https://lkml.kernel.org/r/cover.1581478323.git.afzal.mohd.ma@xxxxxxxxx arch/s390/kernel/irq.c | 8 ++------ drivers/s390/cio/airq.c | 8 ++------ drivers/s390/cio/cio.c | 8 ++------ 3 files changed, 6 insertions(+), 18 deletions(-) diff --git a/arch/s390/kernel/irq.c b/arch/s390/kernel/irq.c index 8371855042dc..6dd90e8d4e3a 100644 --- a/arch/s390/kernel/irq.c +++ b/arch/s390/kernel/irq.c @@ -294,11 +294,6 @@ static irqreturn_t do_ext_interrupt(int irq, void *dummy) return IRQ_HANDLED; } -static struct irqaction external_interrupt = { - .name = "EXT", - .handler = do_ext_interrupt, -}; - void __init init_ext_interrupts(void) { int idx; @@ -308,7 +303,8 @@ void __init init_ext_interrupts(void) irq_set_chip_and_handler(EXT_INTERRUPT, &dummy_irq_chip, handle_percpu_irq); - setup_irq(EXT_INTERRUPT, &external_interrupt); + if (request_irq(EXT_INTERRUPT, do_ext_interrupt, 0, "EXT", NULL)) + pr_err("request_irq() on %s failed\n", "EXT"); } static DEFINE_SPINLOCK(irq_subclass_lock); diff --git a/drivers/s390/cio/airq.c b/drivers/s390/cio/airq.c index 427b2e24a8ce..773208a3bb68 100644 --- a/drivers/s390/cio/airq.c +++ b/drivers/s390/cio/airq.c @@ -105,16 +105,12 @@ static irqreturn_t do_airq_interrupt(int irq, void *dummy) return IRQ_HANDLED; } -static struct irqaction airq_interrupt = { - .name = "AIO", - .handler = do_airq_interrupt, -}; - void __init init_airq_interrupts(void) { irq_set_chip_and_handler(THIN_INTERRUPT, &dummy_irq_chip, handle_percpu_irq); - setup_irq(THIN_INTERRUPT, &airq_interrupt); + if (request_irq(THIN_INTERRUPT, do_airq_interrupt, 0, "AIO", NULL)) + pr_err("request_irq() on %s failed\n", "AIO"); } static inline unsigned long iv_size(unsigned long bits) diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c index 18f5458f90e8..1b87e2e84007 100644 --- a/drivers/s390/cio/cio.c +++ b/drivers/s390/cio/cio.c @@ -563,16 +563,12 @@ static irqreturn_t do_cio_interrupt(int irq, void *dummy) return IRQ_HANDLED; } -static struct irqaction io_interrupt = { - .name = "I/O", - .handler = do_cio_interrupt, -}; - void __init init_cio_interrupts(void) { irq_set_chip_and_handler(IO_INTERRUPT, &dummy_irq_chip, handle_percpu_irq); - setup_irq(IO_INTERRUPT, &io_interrupt); + if (request_irq(IO_INTERRUPT, do_cio_interrupt, 0, "I/O", NULL)) + pr_err("request_irq() on %s failed\n", "I/O"); } #ifdef CONFIG_CCW_CONSOLE -- 2.24.1
