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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2015-02-25 11:42:15 -0800 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2015-03-11 13:22:35 -0700 |
| commit | 2a442c9c6453d3d043dfd89f2e03a1deff8a6f06 (patch) | |
| tree | e1aaab3098d09603152104254acf709e71874d94 /arch/x86/include/asm/cpu.h | |
| parent | 8038dad7e888581266c76df15d70ca457a3c5910 (diff) | |
| download | linux-0-day-2a442c9c6453d3d043dfd89f2e03a1deff8a6f06.tar.gz linux-0-day-2a442c9c6453d3d043dfd89f2e03a1deff8a6f06.tar.xz | |
x86: Use common outgoing-CPU-notification code
This commit removes the open-coded CPU-offline notification with new
common code. Among other things, this change avoids calling scheduler
code using RCU from an offline CPU that RCU is ignoring. It also allows
Xen to notice at online time that the CPU did not go offline correctly.
Note that Xen has the surviving CPU carry out some cleanup operations,
so if the surviving CPU times out, these cleanup operations might have
been carried out while the outgoing CPU was still running. It might
therefore be unwise to bring this CPU back online, and this commit
avoids doing so.
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: <x86@kernel.org>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: David Vrabel <david.vrabel@citrix.com>
Cc: <xen-devel@lists.xenproject.org>
Diffstat (limited to 'arch/x86/include/asm/cpu.h')
| -rw-r--r-- | arch/x86/include/asm/cpu.h | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/x86/include/asm/cpu.h b/arch/x86/include/asm/cpu.h index d2b12988d2ed1..bf2caa1dedc5a 100644 --- a/arch/x86/include/asm/cpu.h +++ b/arch/x86/include/asm/cpu.h @@ -34,8 +34,6 @@ extern int _debug_hotplug_cpu(int cpu, int action); #endif #endif -DECLARE_PER_CPU(int, cpu_state); - int mwait_usable(const struct cpuinfo_x86 *); #endif /* _ASM_X86_CPU_H */ |