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authorAshok Raj <ashok.raj@intel.com>2005-06-25 14:55:00 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-25 16:24:30 -0700
commit76e4f660d9f4c6d1bb473f72be2988c35eaca948 (patch)
tree3a0b3ae0cc12d6f0d96bf1f3b564f8470e0f72ae /include/asm-x86_64/smp.h
parente6982c671c560da4a0bc5c908cbcbec12bd5991d (diff)
downloadop-kernel-dev-76e4f660d9f4c6d1bb473f72be2988c35eaca948.zip
op-kernel-dev-76e4f660d9f4c6d1bb473f72be2988c35eaca948.tar.gz
[PATCH] x86_64: CPU hotplug support
Experimental CPU hotplug patch for x86_64 ----------------------------------------- This supports logical CPU online and offline. - Test with maxcpus=1, and then kick other cpu's off to test if init code is all cleaned up. CONFIG_SCHED_SMT works as well. - idle threads are forked on demand from keventd threads for clean startup TBD: 1. Not tested on a real NUMA machine (tested with numa=fake=2) 2. Handle ACPI pieces for physical hotplug support. Signed-off-by: Ashok Raj <ashok.raj@intel.com> Acked-by: Andi Kleen <ak@muc.de> Acked-by: Zwane Mwaikambo <zwane@arm.linux.org.uk> Signed-off-by: Shaohua.li<shaohua.li@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-x86_64/smp.h')
-rw-r--r--include/asm-x86_64/smp.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/asm-x86_64/smp.h b/include/asm-x86_64/smp.h
index a7425aa..9c6242f 100644
--- a/include/asm-x86_64/smp.h
+++ b/include/asm-x86_64/smp.h
@@ -77,6 +77,8 @@ extern __inline int hard_smp_processor_id(void)
}
extern int safe_smp_processor_id(void);
+extern int __cpu_disable(void);
+extern void __cpu_die(unsigned int cpu);
#endif /* !ASSEMBLY */
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