The patch titled IRQ_NOPROBE helper functions has been removed from the -mm tree. Its filename was irq_noprobe-helper-functions.patch This patch was dropped because it was merged into mainline or a subsystem tree The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ Subject: IRQ_NOPROBE helper functions From: Ralf Baechle <ralf@xxxxxxxxxxxxxx> Probing non-ISA interrupts using the handle_percpu_irq as their handle_irq method may crash the system because handle_percpu_irq does not check IRQ_WAITING. This for example hits the MIPS Qemu configuration. This patch provides two helper functions set_irq_noprobe and set_irq_probe to set rsp. clear the IRQ_NOPROBE flag. The only current caller is MIPS code but this really belongs into generic code. As an aside, interrupt probing these days has become a mostly obsolete if not dangerous art. I think Linux interrupts should be changed to default to non-probing but that's subject of this patch. Signed-off-by: Ralf Baechle <ralf@xxxxxxxxxxxxxx> Acked-and-tested-by: Rob Landley <rob@xxxxxxxxxxx> Cc: Alan Cox <alan@xxxxxxxxxxxxxxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- include/linux/irq.h | 3 +++ kernel/irq/chip.c | 36 ++++++++++++++++++++++++++++++++++++ 2 files changed, 39 insertions(+) diff -puN include/linux/irq.h~irq_noprobe-helper-functions include/linux/irq.h --- a/include/linux/irq.h~irq_noprobe-helper-functions +++ a/include/linux/irq.h @@ -367,6 +367,9 @@ set_irq_chained_handler(unsigned int irq __set_irq_handler(irq, handle, 1, NULL); } +extern void set_irq_noprobe(unsigned int irq); +extern void set_irq_probe(unsigned int irq); + /* Handle dynamic irq creation and destruction */ extern int create_irq(void); extern void destroy_irq(unsigned int irq); diff -puN kernel/irq/chip.c~irq_noprobe-helper-functions kernel/irq/chip.c --- a/kernel/irq/chip.c~irq_noprobe-helper-functions +++ a/kernel/irq/chip.c @@ -589,3 +589,39 @@ set_irq_chip_and_handler_name(unsigned i set_irq_chip(irq, chip); __set_irq_handler(irq, handle, 0, name); } + +void __init set_irq_noprobe(unsigned int irq) +{ + struct irq_desc *desc; + unsigned long flags; + + if (irq >= NR_IRQS) { + printk(KERN_ERR "Trying to mark IRQ%d non-probeable\n", irq); + + return; + } + + desc = irq_desc + irq; + + spin_lock_irqsave(&desc->lock, flags); + desc->status |= IRQ_NOPROBE; + spin_unlock_irqrestore(&desc->lock, flags); +} + +void __init set_irq_probe(unsigned int irq) +{ + struct irq_desc *desc; + unsigned long flags; + + if (irq >= NR_IRQS) { + printk(KERN_ERR "Trying to mark IRQ%d probeable\n", irq); + + return; + } + + desc = irq_desc + irq; + + spin_lock_irqsave(&desc->lock, flags); + desc->status &= ~IRQ_NOPROBE; + spin_unlock_irqrestore(&desc->lock, flags); +} _ Patches currently in -mm which might be from ralf@xxxxxxxxxxxxxx are origin.patch mips-use-find_task_by_vpid-in-system-calls.patch git-watchdog.patch - To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html