[PATCH] set cpu_state for CPU hotplug (ia64)
Shaohua Li [Sat, 25 Jun 2005 21:55:05 +0000 (14:55 -0700)]
Dead CPU notifies online CPU that it's dead using cpu_state variable.
After switching to physical cpu hotplug, we forgot setting the variable.
This patch fixes it.  Currently only __cpu_die uses it.  We changed other
locations for consistency in case others use it.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Acked-by: Ashok Raj <ashok.raj@intel.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/ia64/kernel/smpboot.c

index a888ddc..623b0a5 100644 (file)
@@ -346,6 +346,7 @@ smp_callin (void)
        lock_ipi_calllock();
        cpu_set(cpuid, cpu_online_map);
        unlock_ipi_calllock();
+       per_cpu(cpu_state, cpuid) = CPU_ONLINE;
 
        smp_setup_percpu_timer();
 
@@ -611,6 +612,7 @@ void __devinit smp_prepare_boot_cpu(void)
 {
        cpu_set(smp_processor_id(), cpu_online_map);
        cpu_set(smp_processor_id(), cpu_callin_map);
+       per_cpu(cpu_state, smp_processor_id()) = CPU_ONLINE;
 }
 
 /*
@@ -775,6 +777,7 @@ __cpu_up (unsigned int cpu)
        if (cpu_isset(cpu, cpu_callin_map))
                return -EINVAL;
 
+       per_cpu(cpu_state, cpu) = CPU_UP_PREPARE;
        /* Processor goes to start_secondary(), sets online flag */
        ret = do_boot_cpu(sapicid, cpu);
        if (ret < 0)