BMC/Intel-BMC/linux.git/arch/arm/include/asm/hardirq.h, branch dev

Merge branch 'devel-stable' into for-next

2013-11-12T10:58:59+00:00

Conflicts: arch/arm/include/asm/atomic.h arch/arm/include/asm/hardirq.h arch/arm/kernel/smp.c

ARM: 7872/1: Support arch_irq_work_raise() via self IPIs

2013-11-07T00:21:26+00:00

By default, IRQ work is run from the tick interrupt (see irq_work_run() in update_process_times()). When we're in full NOHZ mode, restarting the tick requires the use of IRQ work and if the only place we run IRQ work is in the tick interrupt we have an unbreakable cycle. Implement arch_irq_work_raise() via self IPIs to break this cycle and get the tick started again. Note that we implement this via IPIs which are only available on SMP builds. This shouldn't be a problem because full NOHZ is only supported on SMP builds anyway. Signed-off-by: Stephen Boyd Reviewed-by: Kevin Hilman Cc: Frederic Weisbecker Signed-off-by: Russell King

ARM: SMP: basic IPI triggered completion support

2013-09-23T22:47:26+00:00

We need a mechanism to let an inbound CPU signal that it is alive before even getting into the kernel environment i.e. from early assembly code. Using an IPI is the simplest way to achieve that. This adds some basic infrastructure to register a struct completion pointer to be "completed" when the dedicated IPI for this task is received. Signed-off-by: Nicolas Pitre

ARM: 7536/1: smp: Formalize an IPI for wakeup

2012-09-19T20:52:08+00:00

Remove the offset from ipi_msg_type and assume that SGI0 is the wakeup interrupt now that all WFI hotplug users call gic_raise_softirq() with 0 instead of 1. This allows us to track how many wakeup interrupts are sent and also removes the unknown IPI printk message for WFI hotplug based systems. Reviewed-by: Nicolas Pitre Signed-off-by: Stephen Boyd Signed-off-by: Russell King

ARM: 7140/1: remove NR_IRQS dependency for ARM-specific HARDIRQ_BITS definition

2011-12-06T11:14:01+00:00

As a first step towards removing NR_IRQS, remove the ARM customization of HARDIRQ_BITS based on NR_IRQS. The generic code in already has a default value of 10 for HARDIRQ_BITS which is the max used on ARM, so let's just remove the NR_IRQS based customization and use the generic default. Signed-off-by: Kevin Hilman Acked-by: Nicolas Pitre Signed-off-by: Russell King

ARM: gic: consolidate PPI handling

2011-10-23T12:32:29+00:00

PPI handling is a bit of an odd beast. It uses its own low level handling code and is hardwired to the local timers (hence lacking a registration interface). Instead, switch the low handling to the normal SPI handling code. PPIs are handled by the handle_percpu_devid_irq flow. This also allows the removal of some duplicated code. Cc: Kukjin Kim Cc: David Brown Cc: Bryan Huntsman Cc: Tony Lindgren Cc: Paul Mundt Cc: Magnus Damm Cc: Thomas Gleixner Acked-by: David Brown Tested-by: David Brown Tested-by: Shawn Guo Signed-off-by: Marc Zyngier

ARM: SMP: collect IPI and local timer IRQs for /proc/stat

2010-12-20T15:08:01+00:00

The IPI and local timer interrupts weren't being properly accounted for in /proc/stat. Collect them from the irq_stat structure, and return their sum. Reviewed-by: Catalin Marinas Signed-off-by: Russell King

ARM: SMP: provide individual IPI interrupt statistics

2010-12-20T15:08:01+00:00

This separates out the individual IPI interrupt counts from the total IPI count, which allows better visibility of what IPIs are being used for. Reviewed-by: Catalin Marinas Signed-off-by: Russell King

ARM: SMP: move ipi_count into irq_stat structure

2010-12-20T15:06:58+00:00

Move the ipi_count into irq_stat, which allows the ipi_data structure to be entirely removed. Reviewed-by: Catalin Marinas Signed-off-by: Russell King

ARM: SMP: provide accessors for irq_stat data

2010-12-20T15:06:58+00:00

Provide __inc_irq_stat() and __get_irq_stat() to increment and read the irq stat counters. Reviewed-by: Catalin Marinas Signed-off-by: Russell King