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| author | Robert Richter <robert.richter@amd.com> | 2008-09-24 11:25:31 +0200 |
|---|---|---|
| committer | Robert Richter <robert.richter@amd.com> | 2008-09-24 11:25:31 +0200 |
| commit | f78e80209cf143be49f268c340431ae9fa3abb74 (patch) | |
| tree | 820fa64b688099dfdd93d27ba03252738ca5c7e2 /kernel/smp.c | |
| parent | 4c168eaf7ea39f25a45a3d8c7eebc3fedb633a1d (diff) | |
| parent | 24342c34a022ee90839873d91396045e12ef1090 (diff) | |
Merge commit 'v2.6.27-rc5' into tip/oprofile
Conflicts:
arch/x86/oprofile/nmi_int.c
Diffstat (limited to 'kernel/smp.c')
| -rw-r--r-- | kernel/smp.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/kernel/smp.c b/kernel/smp.c index 782e2b93e465..f362a8553777 100644 --- a/kernel/smp.c +++ b/kernel/smp.c @@ -210,8 +210,10 @@ int smp_call_function_single(int cpu, void (*func) (void *info), void *info, { struct call_single_data d; unsigned long flags; - /* prevent preemption and reschedule on another processor */ + /* prevent preemption and reschedule on another processor, + as well as CPU removal */ int me = get_cpu(); + int err = 0; /* Can deadlock when called with interrupts disabled */ WARN_ON(irqs_disabled()); @@ -220,7 +222,7 @@ int smp_call_function_single(int cpu, void (*func) (void *info), void *info, local_irq_save(flags); func(info); local_irq_restore(flags); - } else { + } else if ((unsigned)cpu < NR_CPUS && cpu_online(cpu)) { struct call_single_data *data = NULL; if (!wait) { @@ -236,10 +238,12 @@ int smp_call_function_single(int cpu, void (*func) (void *info), void *info, data->func = func; data->info = info; generic_exec_single(cpu, data); + } else { + err = -ENXIO; /* CPU not online */ } put_cpu(); - return 0; + return err; } EXPORT_SYMBOL(smp_call_function_single); |