From: Stas Sergeev Date: Thu, 23 Mar 2006 10:59:44 +0000 (-0800) Subject: [PATCH] Register the boot-cpu in the cpu maps earlier X-Git-Tag: v2.6.17-rc1~1094 X-Git-Url: http://ftp.safe.ca/?p=safe%2Fjmp%2Flinux-2.6;a=commitdiff_plain;h=44fd22992cb76dc51c52cf4b8aff1bc7899bb23c [PATCH] Register the boot-cpu in the cpu maps earlier Register the boot-cpu in the cpu maps earlier to allow the early printk to work, and to fix an obscure deadlock at boot. Signed-off-by: Stas Sergeev Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/init/main.c b/init/main.c index 4c194c4..141e889 100644 --- a/init/main.c +++ b/init/main.c @@ -438,6 +438,15 @@ void __init parse_early_param(void) * Activate the first processor. */ +static void __init boot_cpu_init(void) +{ + int cpu = smp_processor_id(); + /* Mark the boot cpu "present", "online" etc for SMP and UP case */ + cpu_set(cpu, cpu_online_map); + cpu_set(cpu, cpu_present_map); + cpu_set(cpu, cpu_possible_map); +} + asmlinkage void __init start_kernel(void) { char * command_line; @@ -447,17 +456,13 @@ asmlinkage void __init start_kernel(void) * enable them */ lock_kernel(); + boot_cpu_init(); page_address_init(); printk(KERN_NOTICE); printk(linux_banner); setup_arch(&command_line); setup_per_cpu_areas(); - - /* - * Mark the boot cpu "online" so that it can call console drivers in - * printk() and can access its per-cpu storage. - */ - smp_prepare_boot_cpu(); + smp_prepare_boot_cpu(); /* arch-specific boot-cpu hooks */ /* * Set up the scheduler prior starting any interrupts (such as the