Daniel Walker wrote:
On Thu, 2007-04-26 at 16:26 -0400, Peter Keilty wrote:+ .mask = (1LL << 40) - 1, + .mult = 0, /*to be caluclated*/ + .shift = 16, + .is_continuous = 1, };You should use CLOCKSOURCE_MASK() here ..
It is correct in patch 3, I believe.
diff --git a/include/linux/clocksource.h b/include/linux/clocksource.h index daa4940..a20b4d6 100644 --- a/include/linux/clocksource.h +++ b/include/linux/clocksource.h @@ -61,6 +61,9 @@ struct clocksource { u32 shift; unsigned long flags; cycle_t (*vread)(void); +#ifdef CONFIG_IA64 + void *fsys_mmio_ptr; /* used by fsyscall asm code */ +#endifCould you explain in detail why this is needed?
This ptr is needed to hold the mmio address to read the cycle value. The fast ia64 path utilizies a special gate page which can allow user code to execute small amount of kernel code, normal calling a function not done and so the address is need. The fast syscall path executes onuser stack, between user/kernel state. And if the the fast path has to fallback
to the slow syscall code the vread will be needed and used. Hope this helps.
Daniel
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