On Mon, 2007-10-15 at 17:28 +1000, Benjamin Herrenschmidt wrote: > This adds the low level irq tracing hooks to the powerpc architecture > needed to enable full lockdep functionality > > Some rework from Johannes initial version, removing the asm trampoline that > isn't needed (thus improving perfs) and fixing a couple of bugs such as > incorrect initial preempt_count on the softirq alternate stack.
Cool. I always wanted to look into seeing if I could remove that but never got around to it. Thanks! > --- linux-work.orig/include/asm-powerpc/irqflags.h 2007-10-15 > 17:10:12.000000000 +1000 > +++ linux-work/include/asm-powerpc/irqflags.h 2007-10-15 17:11:09.000000000 > +1000 > /* > - * Do the CPU's IRQ-state tracing from assembly code. We call a > - * C function, so save all the C-clobbered registers: > + * Most of the CPU's IRQ-state tracing is done from assembly code; we > + * have to call a C function so call a wrapper that saves all the > + * C-clobbered registers. > */ That comment is now wrong, it should probably be removed. johannes
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