From: travis@sgi.com Date: Wed, 30 Jan 2008 12:33:11 +0000 (+0100) Subject: x86: change NR_CPUS arrays in smpboot_64 X-Git-Tag: v2.6.25-rc1~1143^2~296 X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=24b0d22b7b63bfc71853faf64e76cd45701ecf2a;p=linux-2.6-omap-h63xx.git 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 Reviewed-by: Christoph Lameter Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- diff --git a/arch/x86/kernel/smpboot_64.c b/arch/x86/kernel/smpboot_64.c index 1fea185c9dc..50e207a8261 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