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authorOGAWA Hirofumi <hirofumi@mail.parknet.co.jp>2007-12-03 17:17:10 +0100
committerIngo Molnar <mingo@elte.hu>2007-12-03 17:17:10 +0100
commitc86c7fbc829e27e2a4093f98ded9fbd75e515adb (patch)
tree310d217b4b2e582d84798e65dac309f1d173f1ad /include
parent92d499d991ec4f5cbd00d6f33967eab9d3ee8d6c (diff)
downloadop-kernel-dev-c86c7fbc829e27e2a4093f98ded9fbd75e515adb.zip
op-kernel-dev-c86c7fbc829e27e2a4093f98ded9fbd75e515adb.tar.gz
x86: disable hpet on shutdown
If HPET was enabled by pci quirks, we use i8253 as initial clockevent because pci quirks doesn't run until pci is initialized. The above means the kernel (or something) is assuming HPET legacy replacement is disabled and can use i8253 at boot. If we used kexec, it isn't true. So, this patch disables HPET legacy replacement for kexec in machine_shutdown(). Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Acked-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include')
-rw-r--r--include/asm-x86/hpet.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/asm-x86/hpet.h b/include/asm-x86/hpet.h
index b1f3c1e..ad8d6e7 100644
--- a/include/asm-x86/hpet.h
+++ b/include/asm-x86/hpet.h
@@ -61,6 +61,7 @@ extern unsigned long force_hpet_address;
extern int hpet_force_user;
extern int is_hpet_enabled(void);
extern int hpet_enable(void);
+extern void hpet_disable(void);
extern unsigned long hpet_readl(unsigned long a);
extern void force_hpet_resume(void);
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