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| author | travis@sgi.com <travis@sgi.com> | 2008-01-30 12:33:11 (GMT) |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 12:33:11 (GMT) |
| commit | 24b0d22b7b63bfc71853faf64e76cd45701ecf2a (patch) | |
| tree | aa8a08a5dce827cdee70b9774f2cf66615b5c4c3 | |
| parent | 2c6b8c030cfca334c3d700ee504036c585c4c6a3 (diff) | |
| download | linux-fsl-qoriq-24b0d22b7b63bfc71853faf64e76cd45701ecf2a.tar.xz | |
x86: change NR_CPUS arrays in smpboot_64
Change the following static arrays sized by NR_CPUS to
per_cpu data variables:
task_struct *idle_thread_array[NR_CPUS];
This is only done if CONFIG_HOTPLUG_CPU is defined
as otherwise, the array is removed after initialization
anyways.
Signed-off-by: Mike Travis <travis@sgi.com>
Reviewed-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| -rw-r--r-- | arch/x86/kernel/smpboot_64.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/arch/x86/kernel/smpboot_64.c b/arch/x86/kernel/smpboot_64.c index 1fea185..50e207a 100644 --- a/arch/x86/kernel/smpboot_64.c +++ b/arch/x86/kernel/smpboot_64.c @@ -111,10 +111,20 @@ DEFINE_PER_CPU(int, cpu_state) = { 0 }; * a new thread. Also avoids complicated thread destroy functionality * for idle threads. */ +#ifdef CONFIG_HOTPLUG_CPU +/* + * Needed only for CONFIG_HOTPLUG_CPU because __cpuinitdata is + * removed after init for !CONFIG_HOTPLUG_CPU. + */ +static DEFINE_PER_CPU(struct task_struct *, idle_thread_array); +#define get_idle_for_cpu(x) (per_cpu(idle_thread_array, x)) +#define set_idle_for_cpu(x,p) (per_cpu(idle_thread_array, x) = (p)) +#else struct task_struct *idle_thread_array[NR_CPUS] __cpuinitdata ; - #define get_idle_for_cpu(x) (idle_thread_array[(x)]) #define set_idle_for_cpu(x,p) (idle_thread_array[(x)] = (p)) +#endif + /* * Currently trivial. Write the real->protected mode |