From c1e3b377ad48febba6f91b8ae42c44ee4d4ab45e Mon Sep 17 00:00:00 2001 From: Zhao Yakui Date: Tue, 24 Jun 2008 17:58:53 +0800 Subject: ACPI: Create "idle=halt" bootparam "idle=halt" limits the idle loop to using the halt instruction. No MWAIT, no IO accesses, no C-states deeper than C1. If something is broken in the idle code, "idle=halt" is a less severe workaround than "idle=poll" which disables all power savings. Signed-off-by: Zhao Yakui Signed-off-by: Len Brown Signed-off-by: Andi Kleen --- include/asm-ia64/processor.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/asm-ia64') diff --git a/include/asm-ia64/processor.h b/include/asm-ia64/processor.h index 6aff126fc07..f36e28a5f61 100644 --- a/include/asm-ia64/processor.h +++ b/include/asm-ia64/processor.h @@ -763,6 +763,7 @@ prefetchw (const void *x) #define spin_lock_prefetch(x) prefetchw(x) extern unsigned long boot_option_idle_override; +extern unsigned long idle_halt; #endif /* !__ASSEMBLY__ */ -- cgit v1.2.3