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authorThomas Gleixner <tglx@linutronix.de>2007-03-23 16:08:01 +0100
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-03-23 10:21:02 -0700
commite585bef815c0315f2730d7bb4e15b82602454efd (patch)
tree914d777ba187e656a89075398f81e485885f0aab /include/asm-i386
parent296d93cd0205433489b0689533426ce0a8cf2dec (diff)
[PATCH] i386: add command line option "local_apic_timer_c2_ok"
It turned out that it is almost impossible to trust ACPI, BIOS & Co. regarding the C states. This was the reason to switch the local apic timer off in C2 state already. OTOH there are sane and well behaving systems, which get punished by that decision. Allow the user to confirm that the local apic timer is trustworthy in C2 state. This keeps the default behaviour on the safe side. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/asm-i386')
-rw-r--r--include/asm-i386/apic.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/asm-i386/apic.h b/include/asm-i386/apic.h
index cc6b1652249..a19810a08ae 100644
--- a/include/asm-i386/apic.h
+++ b/include/asm-i386/apic.h
@@ -117,6 +117,7 @@ extern void enable_NMI_through_LVT0 (void * dummy);
#define ARCH_APICTIMER_STOPS_ON_C3 1
extern int timer_over_8254;
+extern int local_apic_timer_c2_ok;
#else /* !CONFIG_X86_LOCAL_APIC */
static inline void lapic_shutdown(void) { }