From 24b0d22b7b63bfc71853faf64e76cd45701ecf2a Mon Sep 17 00:00:00 2001 From: "travis@sgi.com" Date: Wed, 30 Jan 2008 13:33:11 +0100 Subject: [PATCH] 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 --- arch/x86/kernel/smpboot_64.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/arch/x86/kernel/smpboot_64.c b/arch/x86/kernel/smpboot_64.c index 1fea185c9dca..50e207a8261f 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 -- 2.20.1