The purpose of this series is to accelerate IRQ entry by avoiding unneccessary trampoline functions like call_do_irq() and call_do_softirq() and by switching to IRQ stack immediately in the exception handler.
For now, it is an RFC as it is still a bit messy. Please provide feedback and I'll improve next year Christophe Leroy (8): powerpc/32: drop ksp_limit based stack overflow detection powerpc/irq: inline call_do_irq() and call_do_softirq() on PPC32 powerpc/irq: don't use current_stack_pointer() in do_IRQ() powerpc/irq: move set_irq_regs() closer to irq_enter/exit() powerpc/irq: move stack overflow verification powerpc/irq: cleanup check_stack_overflow() a bit powerpc/32: use IRQ stack immediately on IRQ exception powerpc/irq: drop softirq stack arch/powerpc/include/asm/asm-prototypes.h | 1 - arch/powerpc/include/asm/irq.h | 3 +- arch/powerpc/include/asm/processor.h | 3 -- arch/powerpc/include/asm/reg.h | 8 ++++ arch/powerpc/kernel/asm-offsets.c | 2 - arch/powerpc/kernel/entry_32.S | 57 ------------------------ arch/powerpc/kernel/head_32.S | 2 +- arch/powerpc/kernel/head_32.h | 32 +++++++++++-- arch/powerpc/kernel/head_40x.S | 4 +- arch/powerpc/kernel/head_8xx.S | 2 +- arch/powerpc/kernel/head_booke.h | 1 - arch/powerpc/kernel/irq.c | 74 +++++++++++++++++++++---------- arch/powerpc/kernel/misc_32.S | 39 ---------------- arch/powerpc/kernel/process.c | 7 --- arch/powerpc/kernel/setup_32.c | 4 +- arch/powerpc/kernel/setup_64.c | 4 +- arch/powerpc/kernel/traps.c | 9 ---- arch/powerpc/lib/sstep.c | 9 ---- 18 files changed, 95 insertions(+), 166 deletions(-) -- 2.13.3
