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| author | Chris Metcalf <cmetcalf@tilera.com> | 2013-08-07 19:36:54 +0400 |
|---|---|---|
| committer | Chris Metcalf <cmetcalf@tilera.com> | 2013-08-14 00:26:01 +0400 |
| commit | bc1a298f4e04833db4c430df59b90039f0170515 (patch) | |
| tree | 802da739309efeab62317f62ec4f1989f3f7d8dd /arch/tile/kernel/smpboot.c | |
| parent | 1182b69cb24c4f7d7ee8c8afe41b5ab2bc05a15b (diff) | |
| download | linux-bc1a298f4e04833db4c430df59b90039f0170515.tar.xz | |
tile: support CONFIG_PREEMPT
This change adds support for CONFIG_PREEMPT (full kernel preemption).
In addition to the core support, this change includes a number
of places where we fix up uses of smp_processor_id() and per-cpu
variables. I also eliminate the PAGE_HOME_HERE and PAGE_HOME_UNKNOWN
values for page homing, as it turns out they weren't being used.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Diffstat (limited to 'arch/tile/kernel/smpboot.c')
| -rw-r--r-- | arch/tile/kernel/smpboot.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/arch/tile/kernel/smpboot.c b/arch/tile/kernel/smpboot.c index 44bab29bf2f3..dee7f13c5854 100644 --- a/arch/tile/kernel/smpboot.c +++ b/arch/tile/kernel/smpboot.c @@ -142,13 +142,15 @@ static struct cpumask cpu_started __cpuinitdata; */ static void __cpuinit start_secondary(void) { - int cpuid = smp_processor_id(); + int cpuid; + + preempt_disable(); + + cpuid = smp_processor_id(); /* Set our thread pointer appropriately. */ set_my_cpu_offset(__per_cpu_offset[cpuid]); - preempt_disable(); - /* * In large machines even this will slow us down, since we * will be contending for for the printk spinlock. |