From mboxrd@z Thu Jan 1 00:00:00 1970 Message-Id: <20080325220651.822567000@polaris-admin.engr.sgi.com> References: <20080325220650.835342000@polaris-admin.engr.sgi.com> Date: Tue, 25 Mar 2008 15:06:57 -0700 From: Mike Travis Subject: [PATCH 07/10] cpu: change cpu_sys_devices from array to per_cpu variable Content-Disposition: inline; filename=nr_cpus-in-cpu_c Sender: owner-linux-mm@kvack.org Return-Path: To: Andrew Morton Cc: Ingo Molnar , linux-mm@kvack.org, linux-kernel@vger.kernel.org List-ID: Change cpu_sys_devices from array to per_cpu variable in drivers/base/cpu.c. Based on: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86.git (MAINTAINER unknown) Signed-off-by: Mike Travis --- drivers/base/cpu.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) --- linux.trees.git.orig/drivers/base/cpu.c +++ linux.trees.git/drivers/base/cpu.c @@ -18,7 +18,7 @@ struct sysdev_class cpu_sysdev_class = { }; EXPORT_SYMBOL(cpu_sysdev_class); -static struct sys_device *cpu_sys_devices[NR_CPUS]; +static DEFINE_PER_CPU(struct sys_device *, cpu_sys_devices); #ifdef CONFIG_HOTPLUG_CPU static ssize_t show_online(struct sys_device *dev, char *buf) @@ -68,7 +68,7 @@ void unregister_cpu(struct cpu *cpu) sysdev_remove_file(&cpu->sysdev, &attr_online); sysdev_unregister(&cpu->sysdev); - cpu_sys_devices[logical_cpu] = NULL; + per_cpu(cpu_sys_devices, logical_cpu) = NULL; return; } #else /* ... !CONFIG_HOTPLUG_CPU */ @@ -122,7 +122,7 @@ int __cpuinit register_cpu(struct cpu *c if (!error && cpu->hotpluggable) register_cpu_control(cpu); if (!error) - cpu_sys_devices[num] = &cpu->sysdev; + per_cpu(cpu_sys_devices, num) = &cpu->sysdev; if (!error) register_cpu_under_node(num, cpu_to_node(num)); @@ -135,8 +135,8 @@ int __cpuinit register_cpu(struct cpu *c struct sys_device *get_cpu_sysdev(unsigned cpu) { - if (cpu < NR_CPUS) - return cpu_sys_devices[cpu]; + if (cpu < nr_cpu_ids && cpu_possible(cpu)) + return per_cpu(cpu_sys_devices, cpu); else return NULL; } -- -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org