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| author | Ralf Baechle | 2009-06-23 11:00:31 +0200 |
|---|---|---|
| committer | Ralf Baechle | 2009-06-24 19:34:40 +0200 |
| commit | 1b2bc75c1bde6581d2694cb3ed7fb06b69685008 (patch) | |
| tree | 800fc23052bccb1fbf8acfbaabbf5648c69daa9e /arch/mips/kernel/smp-up.c | |
| parent | DMA: txx9dmac: use dma_unmap_single if DMA_COMPL_{SRC,DEST}_UNMAP_SINGLE set (diff) | |
| download | kernel-qcow2-linux-1b2bc75c1bde6581d2694cb3ed7fb06b69685008.tar.gz kernel-qcow2-linux-1b2bc75c1bde6581d2694cb3ed7fb06b69685008.tar.xz kernel-qcow2-linux-1b2bc75c1bde6581d2694cb3ed7fb06b69685008.zip | |
MIPS: Add arch generic CPU hotplug
Each platform has to add support for CPU hotplugging itself by providing
suitable definitions for the cpu_disable and cpu_die of the smp_ops
methods and setting SYS_SUPPORTS_HOTPLUG_CPU. A platform should only set
SYS_SUPPORTS_HOTPLUG_CPU once all it's smp_ops definitions have the
necessary changes. This patch contains the changes to the dummy smp_ops
definition for uni-processor systems.
Parts of the code contributed by Cavium Inc.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/kernel/smp-up.c')
| -rw-r--r-- | arch/mips/kernel/smp-up.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/mips/kernel/smp-up.c b/arch/mips/kernel/smp-up.c index 878e3733bbb2..2508d55d68fd 100644 --- a/arch/mips/kernel/smp-up.c +++ b/arch/mips/kernel/smp-up.c @@ -55,6 +55,18 @@ static void __init up_prepare_cpus(unsigned int max_cpus) { } +#ifdef CONFIG_HOTPLUG_CPU +static int up_cpu_disable(void) +{ + return -ENOSYS; +} + +static void up_cpu_die(unsigned int cpu) +{ + BUG(); +} +#endif + struct plat_smp_ops up_smp_ops = { .send_ipi_single = up_send_ipi_single, .send_ipi_mask = up_send_ipi_mask, @@ -64,4 +76,8 @@ struct plat_smp_ops up_smp_ops = { .boot_secondary = up_boot_secondary, .smp_setup = up_smp_setup, .prepare_cpus = up_prepare_cpus, +#ifdef CONFIG_HOTPLUG_CPU + .cpu_disable = up_cpu_disable, + .cpu_die = up_cpu_die, +#endif }; |