This series adds a configuration option to allow MIPS kernels using CONFIG_GENERIC_IRQ_IPI to use only a single IPI per CPU rather than the usual 2. This allows these kernels to boot on hardware with insufficient interrupts for the usual 2 / CPU. It may also prove more flexible in allowing greater numbers of IPI functions to be delivered without using up additional per CPU interrupts. For example this mechanism may be extended to address the potential for deadlock in arch_trigger_cpumask_backtrace recently pointed out by Huacai Chen. Matt Redfearn (2): MIPS: SMP: Group CONFIG_GENERIC_IRQ_IPI together MIPS: SMP: Introduce CONFIG_SMP_SINGLE_IPI arch/mips/Kconfig | 11 +++++ arch/mips/kernel/smp.c | 106 +++++++++++++++++++++++++++++++++++++++++++++---- 2 files changed, 110 insertions(+), 7 deletions(-) -- 2.7.4
