• Linus Torvalds's avatar
    Merge branch 'x86-irq-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip · 8f147727
    Linus Torvalds authored
    Pull x86 irq updates from Ingo Molnar:
     "Here are the main changes in this tree:
    
       - Introduce x86-64 IRQ/exception/debug stack guard pages to detect
         stack overflows immediately and deterministically.
    
       - Clean up over a decade worth of cruft accumulated.
    
      The outcome of this should be more clear-cut faults/crashes when any
      of the low level x86 CPU stacks overflow, instead of silent memory
      corruption and sporadic failures much later on"
    
    * 'x86-irq-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (33 commits)
      x86/irq: Fix outdated comments
      x86/irq/64: Remove stack overflow debug code
      x86/irq/64: Remap the IRQ stack with guard pages
      x86/irq/64: Split the IRQ stack into its own pages
      x86/irq/64: Init hardirq_stack_ptr during CPU hotplug
      x86/irq/32: Handle irq stack allocation failure proper
      x86/irq/32: Invoke irq_ctx_init() from init_IRQ()
      x86/irq/64: Rename irq_stack_ptr to hardirq_stack_ptr
      x86/irq/32: Rename hard/softirq_stack to hard/softirq_stack_ptr
      x86/irq/32: Make irq stack a character array
      x86/irq/32: Define IRQ_STACK_SIZE
      x86/dumpstack/64: Speedup in_exception_stack()
      x86/exceptions: Split debug IST stack
      x86/exceptions: Enable IST guard pages
      x86/exceptions: Disconnect IST index and stack order
      x86/cpu: Remove orig_ist array
      x86/cpu: Prepare TSS.IST setup for guard pages
      x86/dumpstack/64: Use cpu_entry_area instead of orig_ist
      x86/irq/64: Use cpu entry area instead of orig_ist
      x86/traps: Use cpu_entry_area instead of orig_ist
      ...
    8f147727
entry_64.S 46.8 KB